pulsar/spec/editor-spec.coffee

clipboard = require 'clipboard'

describe "Editor", ->
  [buffer, editor, lineLengths] = []

  convertToHardTabs = (buffer) ->
    buffer.setText(buffer.getText().replace(/[ ]{2}/g, "\t"))

  describe "with an initial line option", ->
    beforeEach ->
      editor = atom.project.openSync('sample.js', initialLine: 2)
      buffer = editor.buffer

    it "opens the file and positions the cursor on line 2", ->
      expect(editor.getCursor().getBufferPosition().row).toEqual 2

  describe "with default options", ->
    beforeEach ->
      atom.packages.activatePackage('language-javascript', sync: true)
      editor = atom.project.openSync('sample.js', autoIndent: false)
      buffer = editor.buffer
      lineLengths = buffer.getLines().map (line) -> line.length

    describe "@deserialize(state)", ->
      it "restores selections and folds based on markers in the buffer", ->
        editor.setSelectedBufferRange([[1, 2], [3, 4]])
        editor.addSelectionForBufferRange([[5, 6], [7, 5]], isReversed: true)
        editor.foldBufferRow(4)
        expect(editor.isFoldedAtBufferRow(4)).toBeTruthy()

        editor2 = atom.deserializers.deserialize(editor.serialize())

        expect(editor2.id).toBe editor.id
        expect(editor2.getBuffer().getPath()).toBe editor.getBuffer().getPath()
        expect(editor2.getSelectedBufferRanges()).toEqual [[[1, 2], [3, 4]], [[5, 6], [7, 5]]]
        expect(editor2.getSelection(1).isReversed()).toBeTruthy()
        expect(editor2.isFoldedAtBufferRow(4)).toBeTruthy()

    describe ".copy()", ->
      it "returns a different edit session with the same initial state", ->
        editor.setSelectedBufferRange([[1, 2], [3, 4]])
        editor.addSelectionForBufferRange([[5, 6], [7, 8]], isReversed: true)
        editor.foldBufferRow(4)
        expect(editor.isFoldedAtBufferRow(4)).toBeTruthy()

        editor2 = editor.copy()
        expect(editor2.id).not.toBe editor.id
        expect(editor2.getSelectedBufferRanges()).toEqual editor.getSelectedBufferRanges()
        expect(editor2.getSelection(1).isReversed()).toBeTruthy()
        expect(editor2.isFoldedAtBufferRow(4)).toBeTruthy()

        # editor2 can now diverge from its origin edit session
        editor2.getSelection().setBufferRange([[2, 1], [4, 3]])
        expect(editor2.getSelectedBufferRanges()).not.toEqual editor.getSelectedBufferRanges()
        editor2.unfoldBufferRow(4)
        expect(editor2.isFoldedAtBufferRow(4)).not.toBe editor.isFoldedAtBufferRow(4)

    describe "config defaults", ->
      it "uses the `editor.tabLength`, `editor.softWrap`, and `editor.softTabs` config values", ->
        atom.config.set('editor.tabLength', 4)
        atom.config.set('editor.softWrap', true)
        atom.config.set('editor.softTabs', false)
        editor1 = atom.project.openSync('a')
        expect(editor1.getTabLength()).toBe 4
        expect(editor1.getSoftWrap()).toBe true
        expect(editor1.getSoftTabs()).toBe false

        atom.config.set('editor.tabLength', 100)
        atom.config.set('editor.softWrap', false)
        atom.config.set('editor.softTabs', true)
        editor2 = atom.project.openSync('b')
        expect(editor2.getTabLength()).toBe 100
        expect(editor2.getSoftWrap()).toBe false
        expect(editor2.getSoftTabs()).toBe true

    describe "title", ->
      describe ".getTitle()", ->
        it "uses the basename of the buffer's path as its title, or 'untitled' if the path is undefined", ->
          expect(editor.getTitle()).toBe 'sample.js'
          buffer.setPath(undefined)
          expect(editor.getTitle()).toBe 'untitled'

      describe ".getLongTitle()", ->
        it "appends the name of the containing directory to the basename of the file", ->
          expect(editor.getLongTitle()).toBe 'sample.js - fixtures'
          buffer.setPath(undefined)
          expect(editor.getLongTitle()).toBe 'untitled'

      it "emits 'title-changed' events when the underlying buffer path", ->
        titleChangedHandler = jasmine.createSpy("titleChangedHandler")
        editor.on 'title-changed', titleChangedHandler

        buffer.setPath('/foo/bar/baz.txt')
        buffer.setPath(undefined)
        expect(titleChangedHandler.callCount).toBe 2

    describe "cursor", ->
      describe ".getCursor()", ->
        it "returns the most recently created cursor", ->
          editor.addCursorAtScreenPosition([1, 0])
          lastCursor = editor.addCursorAtScreenPosition([2, 0])
          expect(editor.getCursor()).toBe lastCursor

      describe ".setCursorScreenPosition(screenPosition)", ->
        it "clears a goal column established by vertical movement", ->
          # set a goal column by moving down
          editor.setCursorScreenPosition(row: 3, column: lineLengths[3])
          editor.moveCursorDown()
          expect(editor.getCursorScreenPosition().column).not.toBe 6

          # clear the goal column by explicitly setting the cursor position
          editor.setCursorScreenPosition([4,6])
          expect(editor.getCursorScreenPosition().column).toBe 6

          editor.moveCursorDown()
          expect(editor.getCursorScreenPosition().column).toBe 6

        it "merges multiple cursors", ->
          editor.setCursorScreenPosition([0, 0])
          editor.addCursorAtScreenPosition([0, 1])
          [cursor1, cursor2] = editor.getCursors()
          editor.setCursorScreenPosition([4, 7])
          expect(editor.getCursors().length).toBe 1
          expect(editor.getCursors()).toEqual [cursor1]
          expect(editor.getCursorScreenPosition()).toEqual [4, 7]

        describe "when soft-wrap is enabled and code is folded", ->
          beforeEach ->
            editor.setSoftWrap(true)
            editor.setEditorWidthInChars(50)
            editor.createFold(2, 3)

          it "positions the cursor at the buffer position that corresponds to the given screen position", ->
            editor.setCursorScreenPosition([9, 0])
            expect(editor.getCursorBufferPosition()).toEqual [8, 11]

      describe ".moveCursorUp()", ->
        it "moves the cursor up", ->
          editor.setCursorScreenPosition([2, 2])
          editor.moveCursorUp()
          expect(editor.getCursorScreenPosition()).toEqual [1, 2]

        it "retains the goal column across lines of differing length", ->
          expect(lineLengths[6]).toBeGreaterThan(32)
          editor.setCursorScreenPosition(row: 6, column: 32)

          editor.moveCursorUp()
          expect(editor.getCursorScreenPosition().column).toBe lineLengths[5]

          editor.moveCursorUp()
          expect(editor.getCursorScreenPosition().column).toBe lineLengths[4]

          editor.moveCursorUp()
          expect(editor.getCursorScreenPosition().column).toBe 32

        describe "when the cursor is on the first line", ->
          it "moves the cursor to the beginning of the line, but retains the goal column", ->
            editor.setCursorScreenPosition([0, 4])
            editor.moveCursorUp()
            expect(editor.getCursorScreenPosition()).toEqual([0, 0])

            editor.moveCursorDown()
            expect(editor.getCursorScreenPosition()).toEqual([1, 4])

        describe "when there is a selection", ->
          beforeEach ->
            editor.setSelectedBufferRange([[4, 9],[5, 10]])

          it "moves above the selection", ->
            cursor = editor.getCursor()
            editor.moveCursorUp()
            expect(cursor.getBufferPosition()).toEqual [3, 9]

        it "merges cursors when they overlap", ->
          editor.addCursorAtScreenPosition([1, 0])
          [cursor1, cursor2] = editor.getCursors()

          editor.moveCursorUp()
          expect(editor.getCursors()).toEqual [cursor1]
          expect(cursor1.getBufferPosition()).toEqual [0,0]

      describe ".moveCursorDown()", ->
        it "moves the cursor down", ->
          editor.setCursorScreenPosition([2, 2])
          editor.moveCursorDown()
          expect(editor.getCursorScreenPosition()).toEqual [3, 2]

        it "retains the goal column across lines of differing length", ->
          editor.setCursorScreenPosition(row: 3, column: lineLengths[3])

          editor.moveCursorDown()
          expect(editor.getCursorScreenPosition().column).toBe lineLengths[4]

          editor.moveCursorDown()
          expect(editor.getCursorScreenPosition().column).toBe lineLengths[5]

          editor.moveCursorDown()
          expect(editor.getCursorScreenPosition().column).toBe lineLengths[3]

        describe "when the cursor is on the last line", ->
          it "moves the cursor to the end of line, but retains the goal column when moving back up", ->
            lastLineIndex = buffer.getLines().length - 1
            lastLine = buffer.lineForRow(lastLineIndex)
            expect(lastLine.length).toBeGreaterThan(0)

            editor.setCursorScreenPosition(row: lastLineIndex, column: editor.getTabLength())
            editor.moveCursorDown()
            expect(editor.getCursorScreenPosition()).toEqual(row: lastLineIndex, column: lastLine.length)

            editor.moveCursorUp()
            expect(editor.getCursorScreenPosition().column).toBe editor.getTabLength()

          it "retains a goal column of 0 when moving back up", ->
            lastLineIndex = buffer.getLines().length - 1
            lastLine = buffer.lineForRow(lastLineIndex)
            expect(lastLine.length).toBeGreaterThan(0)

            editor.setCursorScreenPosition(row: lastLineIndex, column: 0)
            editor.moveCursorDown()
            editor.moveCursorUp()
            expect(editor.getCursorScreenPosition().column).toBe 0

        describe "when there is a selection", ->
          beforeEach ->
            editor.setSelectedBufferRange([[4, 9],[5, 10]])

          it "moves below the selection", ->
            cursor = editor.getCursor()
            editor.moveCursorDown()
            expect(cursor.getBufferPosition()).toEqual [6, 10]

        it "merges cursors when they overlap", ->
          editor.setCursorScreenPosition([12, 2])
          editor.addCursorAtScreenPosition([11, 2])
          [cursor1, cursor2] = editor.getCursors()

          editor.moveCursorDown()
          expect(editor.getCursors()).toEqual [cursor1]
          expect(cursor1.getBufferPosition()).toEqual [12,2]

      describe ".moveCursorLeft()", ->
        it "moves the cursor by one column to the left", ->
          editor.setCursorScreenPosition([1, 8])
          editor.moveCursorLeft()
          expect(editor.getCursorScreenPosition()).toEqual [1, 7]

        describe "when the cursor is in the first column", ->
          describe "when there is a previous line", ->
            it "wraps to the end of the previous line", ->
              editor.setCursorScreenPosition(row: 1, column: 0)
              editor.moveCursorLeft()
              expect(editor.getCursorScreenPosition()).toEqual(row: 0, column: buffer.lineForRow(0).length)

          describe "when the cursor is on the first line", ->
            it "remains in the same position (0,0)", ->
              editor.setCursorScreenPosition(row: 0, column: 0)
              editor.moveCursorLeft()
              expect(editor.getCursorScreenPosition()).toEqual(row: 0, column: 0)

        describe "when softTabs is enabled and the cursor is preceded by leading whitespace", ->
          it "skips tabLength worth of whitespace at a time", ->
            editor.setCursorBufferPosition([5, 6])

            editor.moveCursorLeft()
            expect(editor.getCursorBufferPosition()).toEqual [5, 4]

        describe "when there is a selection", ->
          beforeEach ->
            editor.setSelectedBufferRange([[5, 22],[5, 27]])

          it "moves to the left of the selection", ->
            cursor = editor.getCursor()
            editor.moveCursorLeft()
            expect(cursor.getBufferPosition()).toEqual [5, 22]

            editor.moveCursorLeft()
            expect(cursor.getBufferPosition()).toEqual [5, 21]

        it "merges cursors when they overlap", ->
          editor.setCursorScreenPosition([0, 0])
          editor.addCursorAtScreenPosition([0, 1])

          [cursor1, cursor2] = editor.getCursors()
          editor.moveCursorLeft()
          expect(editor.getCursors()).toEqual [cursor1]
          expect(cursor1.getBufferPosition()).toEqual [0,0]

      describe ".moveCursorRight()", ->
        it "moves the cursor by one column to the right", ->
          editor.setCursorScreenPosition([3, 3])
          editor.moveCursorRight()
          expect(editor.getCursorScreenPosition()).toEqual [3, 4]

        describe "when the cursor is on the last column of a line", ->
          describe "when there is a subsequent line", ->
            it "wraps to the beginning of the next line", ->
              editor.setCursorScreenPosition([0, buffer.lineForRow(0).length])
              editor.moveCursorRight()
              expect(editor.getCursorScreenPosition()).toEqual [1, 0]

          describe "when the cursor is on the last line", ->
            it "remains in the same position", ->
              lastLineIndex = buffer.getLines().length - 1
              lastLine = buffer.lineForRow(lastLineIndex)
              expect(lastLine.length).toBeGreaterThan(0)

              lastPosition = { row: lastLineIndex, column: lastLine.length }
              editor.setCursorScreenPosition(lastPosition)
              editor.moveCursorRight()

              expect(editor.getCursorScreenPosition()).toEqual(lastPosition)

        describe "when there is a selection", ->
          beforeEach ->
            editor.setSelectedBufferRange([[5, 22],[5, 27]])

          it "moves to the left of the selection", ->
            cursor = editor.getCursor()
            editor.moveCursorRight()
            expect(cursor.getBufferPosition()).toEqual [5, 27]

            editor.moveCursorRight()
            expect(cursor.getBufferPosition()).toEqual [5, 28]

        it "merges cursors when they overlap", ->
          editor.setCursorScreenPosition([12, 2])
          editor.addCursorAtScreenPosition([12, 1])
          [cursor1, cursor2] = editor.getCursors()

          editor.moveCursorRight()
          expect(editor.getCursors()).toEqual [cursor1]
          expect(cursor1.getBufferPosition()).toEqual [12,2]

      describe ".moveCursorToTop()", ->
        it "moves the cursor to the top of the buffer", ->
          editor.setCursorScreenPosition [11,1]
          editor.addCursorAtScreenPosition [12,0]
          editor.moveCursorToTop()
          expect(editor.getCursors().length).toBe 1
          expect(editor.getCursorBufferPosition()).toEqual [0,0]

      describe ".moveCursorToBottom()", ->
        it "moves the cusor to the bottom of the buffer", ->
          editor.setCursorScreenPosition [0,0]
          editor.addCursorAtScreenPosition [1,0]
          editor.moveCursorToBottom()
          expect(editor.getCursors().length).toBe 1
          expect(editor.getCursorBufferPosition()).toEqual [12,2]

      describe ".moveCursorToBeginningOfLine()", ->
        describe "when soft wrap is on", ->
          it "moves cursor to the beginning of the screen line", ->
            editor.setSoftWrap(true)
            editor.setEditorWidthInChars(10)
            editor.setCursorScreenPosition([1, 2])
            editor.moveCursorToBeginningOfLine()
            cursor = editor.getCursor()
            expect(cursor.getScreenPosition()).toEqual [1, 0]

        describe "when soft wrap is off", ->
          it "moves cursor to the beginning of then line", ->
            editor.setCursorScreenPosition [0,5]
            editor.addCursorAtScreenPosition [1,7]
            editor.moveCursorToBeginningOfLine()
            expect(editor.getCursors().length).toBe 2
            [cursor1, cursor2] = editor.getCursors()
            expect(cursor1.getBufferPosition()).toEqual [0,0]
            expect(cursor2.getBufferPosition()).toEqual [1,0]

      describe ".moveCursorToEndOfLine()", ->
        describe "when soft wrap is on", ->
          it "moves cursor to the beginning of the screen line", ->
            editor.setSoftWrap(true)
            editor.setEditorWidthInChars(10)
            editor.setCursorScreenPosition([1, 2])
            editor.moveCursorToEndOfLine()
            cursor = editor.getCursor()
            expect(cursor.getScreenPosition()).toEqual [1, 9]

        describe "when soft wrap is off", ->
          it "moves cursor to the end of line", ->
            editor.setCursorScreenPosition [0,0]
            editor.addCursorAtScreenPosition [1,0]
            editor.moveCursorToEndOfLine()
            expect(editor.getCursors().length).toBe 2
            [cursor1, cursor2] = editor.getCursors()
            expect(cursor1.getBufferPosition()).toEqual [0,29]
            expect(cursor2.getBufferPosition()).toEqual [1,30]

      describe ".moveCursorToFirstCharacterOfLine()", ->
        describe "when soft wrap is on", ->
          it "moves to the first character of the current screen line or the beginning of the screen line if it's already on the first character", ->
            editor.setSoftWrap(true)
            editor.setEditorWidthInChars(10)
            editor.setCursorScreenPosition [2,5]
            editor.addCursorAtScreenPosition [8,7]

            editor.moveCursorToFirstCharacterOfLine()
            [cursor1, cursor2] = editor.getCursors()
            expect(cursor1.getScreenPosition()).toEqual [2,0]
            expect(cursor2.getScreenPosition()).toEqual [8,4]

            editor.moveCursorToFirstCharacterOfLine()
            expect(cursor1.getScreenPosition()).toEqual [2,0]
            expect(cursor2.getScreenPosition()).toEqual [8,0]

        describe "when soft wrap is off", ->
          it "moves to the first character of the current line or the beginning of the line if it's already on the first character", ->
            editor.setCursorScreenPosition [0,5]
            editor.addCursorAtScreenPosition [1,7]

            editor.moveCursorToFirstCharacterOfLine()
            [cursor1, cursor2] = editor.getCursors()
            expect(cursor1.getBufferPosition()).toEqual [0,0]
            expect(cursor2.getBufferPosition()).toEqual [1,2]

            editor.moveCursorToFirstCharacterOfLine()
            expect(cursor1.getBufferPosition()).toEqual [0,0]
            expect(cursor2.getBufferPosition()).toEqual [1,0]

      describe ".moveCursorToBeginningOfWord()", ->
        it "moves the cursor to the beginning of the word", ->
          editor.setCursorBufferPosition [0, 8]
          editor.addCursorAtBufferPosition [1, 12]
          editor.addCursorAtBufferPosition [3, 0]
          [cursor1, cursor2, cursor3] = editor.getCursors()

          editor.moveCursorToBeginningOfWord()

          expect(cursor1.getBufferPosition()).toEqual [0, 4]
          expect(cursor2.getBufferPosition()).toEqual [1, 11]
          expect(cursor3.getBufferPosition()).toEqual [2, 39]

        it "does not fail at position [0, 0]", ->
          editor.setCursorBufferPosition([0, 0])
          editor.moveCursorToBeginningOfWord()

        it "treats lines with only whitespace as a word", ->
          editor.setCursorBufferPosition([11, 0])
          editor.moveCursorToBeginningOfWord()
          expect(editor.getCursorBufferPosition()).toEqual [10, 0]

        it "works when the current line is blank", ->
          editor.setCursorBufferPosition([10, 0])
          editor.moveCursorToBeginningOfWord()
          expect(editor.getCursorBufferPosition()).toEqual [9, 2]

      describe ".moveCursorToPreviousWordBoundary()", ->
        it "moves the cursor to the previous word boundary", ->
          editor.setCursorBufferPosition [0, 8]
          editor.addCursorAtBufferPosition [2, 0]
          editor.addCursorAtBufferPosition [2, 4]
          editor.addCursorAtBufferPosition [3, 14]
          [cursor1, cursor2, cursor3, cursor4] = editor.getCursors()

          editor.moveCursorToPreviousWordBoundary()

          expect(cursor1.getBufferPosition()).toEqual [0, 4]
          expect(cursor2.getBufferPosition()).toEqual [1, 30]
          expect(cursor3.getBufferPosition()).toEqual [2, 0]
          expect(cursor4.getBufferPosition()).toEqual [3, 13]

      describe ".moveCursorToNextWordBoundary()", ->
        it "moves the cursor to the previous word boundary", ->
          editor.setCursorBufferPosition [0, 8]
          editor.addCursorAtBufferPosition [2, 40]
          editor.addCursorAtBufferPosition [3, 0]
          editor.addCursorAtBufferPosition [3, 30]
          [cursor1, cursor2, cursor3, cursor4] = editor.getCursors()

          editor.moveCursorToNextWordBoundary()

          expect(cursor1.getBufferPosition()).toEqual [0, 13]
          expect(cursor2.getBufferPosition()).toEqual [3, 0]
          expect(cursor3.getBufferPosition()).toEqual [3, 4]
          expect(cursor4.getBufferPosition()).toEqual [3, 31]

      describe ".moveCursorToEndOfWord()", ->
        it "moves the cursor to the end of the word", ->
          editor.setCursorBufferPosition [0, 6]
          editor.addCursorAtBufferPosition [1, 10]
          editor.addCursorAtBufferPosition [2, 40]
          [cursor1, cursor2, cursor3] = editor.getCursors()

          editor.moveCursorToEndOfWord()

          expect(cursor1.getBufferPosition()).toEqual [0, 13]
          expect(cursor2.getBufferPosition()).toEqual [1, 12]
          expect(cursor3.getBufferPosition()).toEqual [3, 7]

        it "does not blow up when there is no next word", ->
          editor.setCursorBufferPosition [Infinity, Infinity]
          endPosition = editor.getCursorBufferPosition()
          editor.moveCursorToEndOfWord()
          expect(editor.getCursorBufferPosition()).toEqual endPosition

        it "treats lines with only whitespace as a word", ->
          editor.setCursorBufferPosition([9, 4])
          editor.moveCursorToEndOfWord()
          expect(editor.getCursorBufferPosition()).toEqual [10, 0]

        it "works when the current line is blank", ->
          editor.setCursorBufferPosition([10, 0])
          editor.moveCursorToEndOfWord()
          expect(editor.getCursorBufferPosition()).toEqual [11, 8]

      describe ".moveCursorToBeginningOfNextWord()", ->
        it "moves the cursor before the first character of the next word", ->
          editor.setCursorBufferPosition [0,6]
          editor.addCursorAtBufferPosition [1,11]
          editor.addCursorAtBufferPosition [2,0]
          [cursor1, cursor2, cursor3] = editor.getCursors()

          editor.moveCursorToBeginningOfNextWord()

          expect(cursor1.getBufferPosition()).toEqual [0, 14]
          expect(cursor2.getBufferPosition()).toEqual [1, 13]
          expect(cursor3.getBufferPosition()).toEqual [2, 4]

          # When the cursor is on whitespace
          editor.setText("ab cde- ")
          editor.setCursorBufferPosition [0,2]
          cursor = editor.getCursor()
          editor.moveCursorToBeginningOfNextWord()

          expect(cursor.getBufferPosition()).toEqual [0, 3]

        it "does not blow up when there is no next word", ->
          editor.setCursorBufferPosition [Infinity, Infinity]
          endPosition = editor.getCursorBufferPosition()
          editor.moveCursorToBeginningOfNextWord()
          expect(editor.getCursorBufferPosition()).toEqual endPosition

        it "treats lines with only whitespace as a word", ->
          editor.setCursorBufferPosition([9, 4])
          editor.moveCursorToBeginningOfNextWord()
          expect(editor.getCursorBufferPosition()).toEqual [10, 0]

        it "works when the current line is blank", ->
          editor.setCursorBufferPosition([10, 0])
          editor.moveCursorToBeginningOfNextWord()
          expect(editor.getCursorBufferPosition()).toEqual [11, 9]

      describe ".getCurrentParagraphBufferRange()", ->
        it "returns the buffer range of the current paragraph, delimited by blank lines or the beginning / end of the file", ->
          buffer.setText """
              I am the first paragraph,
            bordered by the beginning of
            the file
            #{'   '}

              I am the second paragraph
            with blank lines above and below
            me.

            I am the last paragraph,
            bordered by the end of the file.
          """

          # in a paragraph
          editor.setCursorBufferPosition([1, 7])
          expect(editor.getCurrentParagraphBufferRange()).toEqual [[0, 0], [2, 8]]

          editor.setCursorBufferPosition([7, 1])
          expect(editor.getCurrentParagraphBufferRange()).toEqual [[5, 0], [7, 3]]

          editor.setCursorBufferPosition([9, 10])
          expect(editor.getCurrentParagraphBufferRange()).toEqual [[9, 0], [10, 32]]

          # between paragraphs
          editor.setCursorBufferPosition([3, 1])
          expect(editor.getCurrentParagraphBufferRange()).toBeUndefined()

      describe "cursor-moved events", ->
        cursorMovedHandler = null

        beforeEach ->
          editor.foldBufferRow(4)
          editor.setSelectedBufferRange([[8, 1], [9, 0]])
          cursorMovedHandler = jasmine.createSpy("cursorMovedHandler")
          editor.on 'cursor-moved', cursorMovedHandler

        describe "when the position of the cursor changes", ->
          it "emits a cursor-moved event", ->
            buffer.insert([9, 0], '...')
            expect(cursorMovedHandler).toHaveBeenCalledWith(
              oldBufferPosition: [9, 0]
              oldScreenPosition: [6, 0]
              newBufferPosition: [9, 3]
              newScreenPosition: [6, 3]
              textChanged: true
            )

        describe "when the position of the associated selection's tail changes, but not the cursor's position", ->
          it "does not emit a cursor-moved event", ->
            buffer.insert([8, 0], '...')
            expect(cursorMovedHandler).not.toHaveBeenCalled()

      describe "addCursorAtScreenPosition(screenPosition)", ->
        describe "when a cursor already exists at the position", ->
          it "returns the existing cursor", ->
            cursor1 = editor.addCursorAtScreenPosition([0,2])
            cursor2 = editor.addCursorAtScreenPosition([0,2])
            expect(cursor2.marker).toBe cursor1.marker

      describe "addCursorAtBufferPosition(bufferPosition)", ->
        describe "when a cursor already exists at the position", ->
          it "returns the existing cursor", ->
            cursor1 = editor.addCursorAtBufferPosition([1,4])
            cursor2 = editor.addCursorAtBufferPosition([1,4])
            expect(cursor2.marker).toBe cursor1.marker

    describe "selection", ->
      selection = null

      beforeEach ->
        selection = editor.getSelection()

      describe ".selectUp/Down/Left/Right()", ->
        it "expands each selection to its cursor's new location", ->
          editor.setSelectedBufferRanges([[[0,9], [0,13]], [[3,16], [3,21]]])
          [selection1, selection2] = editor.getSelections()

          editor.selectRight()
          expect(selection1.getBufferRange()).toEqual [[0,9], [0,14]]
          expect(selection2.getBufferRange()).toEqual [[3,16], [3,22]]

          editor.selectLeft()
          editor.selectLeft()
          expect(selection1.getBufferRange()).toEqual [[0,9], [0,12]]
          expect(selection2.getBufferRange()).toEqual [[3,16], [3,20]]

          editor.selectDown()
          expect(selection1.getBufferRange()).toEqual [[0,9], [1,12]]
          expect(selection2.getBufferRange()).toEqual [[3,16], [4,20]]

          editor.selectUp()
          expect(selection1.getBufferRange()).toEqual [[0,9], [0,12]]
          expect(selection2.getBufferRange()).toEqual [[3,16], [3,20]]

        it "merges selections when they intersect when moving down", ->
          editor.setSelectedBufferRanges([[[0,9], [0,13]], [[1,10], [1,20]], [[2,15], [3,25]]])
          [selection1, selection2, selection3] = editor.getSelections()

          editor.selectDown()
          expect(editor.getSelections()).toEqual [selection1]
          expect(selection1.getScreenRange()).toEqual([[0, 9], [4, 25]])
          expect(selection1.isReversed()).toBeFalsy()

        it "merges selections when they intersect when moving up", ->
          editor.setSelectedBufferRanges([[[0,9], [0,13]], [[1,10], [1,20]]], isReversed: true)
          [selection1, selection2] = editor.getSelections()

          editor.selectUp()

          expect(editor.getSelections().length).toBe 1
          expect(editor.getSelections()).toEqual [selection1]
          expect(selection1.getScreenRange()).toEqual([[0, 0], [1, 20]])
          expect(selection1.isReversed()).toBeTruthy()

        it "merges selections when they intersect when moving left", ->
          editor.setSelectedBufferRanges([[[0,9], [0,13]], [[0,14], [1,20]]], isReversed: true)
          [selection1, selection2] = editor.getSelections()

          editor.selectLeft()
          expect(editor.getSelections()).toEqual [selection1]
          expect(selection1.getScreenRange()).toEqual([[0, 8], [1, 20]])
          expect(selection1.isReversed()).toBeTruthy()

        it "merges selections when they intersect when moving right", ->
          editor.setSelectedBufferRanges([[[0,9], [0,13]], [[0,14], [1,20]]])
          [selection1, selection2] = editor.getSelections()

          editor.selectRight()
          expect(editor.getSelections()).toEqual [selection1]
          expect(selection1.getScreenRange()).toEqual([[0, 9], [1, 21]])
          expect(selection1.isReversed()).toBeFalsy()

      describe ".selectToScreenPosition(screenPosition)", ->
        it "expands the last selection to the given position", ->
          editor.setSelectedBufferRange([[3, 0], [4, 5]])
          editor.addCursorAtScreenPosition([5, 6])
          editor.selectToScreenPosition([6, 2])

          selections = editor.getSelections()
          expect(selections.length).toBe 2
          [selection1, selection2] = selections
          expect(selection1.getScreenRange()).toEqual [[3, 0], [4, 5]]
          expect(selection2.getScreenRange()).toEqual [[5, 6], [6, 2]]

        it "merges selections if they intersect, maintaining the directionality of the last selection", ->
          editor.setCursorScreenPosition([4, 10])
          editor.selectToScreenPosition([5, 27])
          editor.addCursorAtScreenPosition([3, 10])
          editor.selectToScreenPosition([6, 27])

          selections = editor.getSelections()
          expect(selections.length).toBe 1
          [selection1] = selections
          expect(selection1.getScreenRange()).toEqual [[3, 10], [6, 27]]
          expect(selection1.isReversed()).toBeFalsy()

          editor.addCursorAtScreenPosition([7, 4])
          editor.selectToScreenPosition([4, 11])

          selections = editor.getSelections()
          expect(selections.length).toBe 1
          [selection1] = selections
          expect(selection1.getScreenRange()).toEqual [[3, 10], [7, 4]]
          expect(selection1.isReversed()).toBeTruthy()

      describe ".selectToTop()", ->
        it "selects text from cusor position to the top of the buffer", ->
          editor.setCursorScreenPosition [11,2]
          editor.addCursorAtScreenPosition [10,0]
          editor.selectToTop()
          expect(editor.getCursors().length).toBe 1
          expect(editor.getCursorBufferPosition()).toEqual [0,0]
          expect(editor.getSelection().getBufferRange()).toEqual [[0,0], [11,2]]
          expect(editor.getSelection().isReversed()).toBeTruthy()

      describe ".selectToBottom()", ->
        it "selects text from cusor position to the bottom of the buffer", ->
          editor.setCursorScreenPosition [10,0]
          editor.addCursorAtScreenPosition [9,3]
          editor.selectToBottom()
          expect(editor.getCursors().length).toBe 1
          expect(editor.getCursorBufferPosition()).toEqual [12,2]
          expect(editor.getSelection().getBufferRange()).toEqual [[9,3], [12,2]]
          expect(editor.getSelection().isReversed()).toBeFalsy()

      describe ".selectAll()", ->
        it "selects the entire buffer", ->
          editor.selectAll()
          expect(editor.getSelection().getBufferRange()).toEqual buffer.getRange()

      describe ".selectToBeginningOfLine()", ->
        it "selects text from cusor position to beginning of line", ->
          editor.setCursorScreenPosition [12,2]
          editor.addCursorAtScreenPosition [11,3]

          editor.selectToBeginningOfLine()

          expect(editor.getCursors().length).toBe 2
          [cursor1, cursor2] = editor.getCursors()
          expect(cursor1.getBufferPosition()).toEqual [12,0]
          expect(cursor2.getBufferPosition()).toEqual [11,0]

          expect(editor.getSelections().length).toBe 2
          [selection1, selection2] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[12,0], [12,2]]
          expect(selection1.isReversed()).toBeTruthy()
          expect(selection2.getBufferRange()).toEqual [[11,0], [11,3]]
          expect(selection2.isReversed()).toBeTruthy()

      describe ".selectToEndOfLine()", ->
        it "selects text from cusor position to end of line", ->
          editor.setCursorScreenPosition [12,0]
          editor.addCursorAtScreenPosition [11,3]

          editor.selectToEndOfLine()

          expect(editor.getCursors().length).toBe 2
          [cursor1, cursor2] = editor.getCursors()
          expect(cursor1.getBufferPosition()).toEqual [12,2]
          expect(cursor2.getBufferPosition()).toEqual [11,44]

          expect(editor.getSelections().length).toBe 2
          [selection1, selection2] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[12,0], [12,2]]
          expect(selection1.isReversed()).toBeFalsy()
          expect(selection2.getBufferRange()).toEqual [[11,3], [11,44]]
          expect(selection2.isReversed()).toBeFalsy()

      describe ".selectLine()", ->
        it "selects the entire line (including newlines) at given row", ->
          editor.setCursorScreenPosition([1, 2])
          editor.selectLine()
          expect(editor.getSelectedBufferRange()).toEqual [[1,0], [2,0]]
          expect(editor.getSelectedText()).toBe "  var sort = function(items) {\n"

          editor.setCursorScreenPosition([12, 2])
          editor.selectLine()
          expect(editor.getSelectedBufferRange()).toEqual [[12,0], [12,2]]

      describe ".selectToBeginningOfWord()", ->
        it "selects text from cusor position to beginning of word", ->
          editor.setCursorScreenPosition [0,13]
          editor.addCursorAtScreenPosition [3,49]

          editor.selectToBeginningOfWord()

          expect(editor.getCursors().length).toBe 2
          [cursor1, cursor2] = editor.getCursors()
          expect(cursor1.getBufferPosition()).toEqual [0,4]
          expect(cursor2.getBufferPosition()).toEqual [3,47]

          expect(editor.getSelections().length).toBe 2
          [selection1, selection2] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[0,4], [0,13]]
          expect(selection1.isReversed()).toBeTruthy()
          expect(selection2.getBufferRange()).toEqual [[3,47], [3,49]]
          expect(selection2.isReversed()).toBeTruthy()

      describe ".selectToEndOfWord()", ->
        it "selects text from cusor position to end of word", ->
          editor.setCursorScreenPosition [0,4]
          editor.addCursorAtScreenPosition [3,48]

          editor.selectToEndOfWord()

          expect(editor.getCursors().length).toBe 2
          [cursor1, cursor2] = editor.getCursors()
          expect(cursor1.getBufferPosition()).toEqual [0,13]
          expect(cursor2.getBufferPosition()).toEqual [3,50]

          expect(editor.getSelections().length).toBe 2
          [selection1, selection2] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[0,4], [0,13]]
          expect(selection1.isReversed()).toBeFalsy()
          expect(selection2.getBufferRange()).toEqual [[3,48], [3,50]]
          expect(selection2.isReversed()).toBeFalsy()

      describe ".selectToBeginningOfNextWord()", ->
        it "selects text from cusor position to beginning of next word", ->
          editor.setCursorScreenPosition [0,4]
          editor.addCursorAtScreenPosition [3,48]

          editor.selectToBeginningOfNextWord()

          expect(editor.getCursors().length).toBe 2
          [cursor1, cursor2] = editor.getCursors()
          expect(cursor1.getBufferPosition()).toEqual [0,14]
          expect(cursor2.getBufferPosition()).toEqual [3,51]

          expect(editor.getSelections().length).toBe 2
          [selection1, selection2] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[0,4], [0,14]]
          expect(selection1.isReversed()).toBeFalsy()
          expect(selection2.getBufferRange()).toEqual [[3,48], [3,51]]
          expect(selection2.isReversed()).toBeFalsy()

      describe ".selectToPreviousWordBoundary()", ->
        it "select to the previous word boundary", ->
          editor.setCursorBufferPosition [0, 8]
          editor.addCursorAtBufferPosition [2, 0]
          editor.addCursorAtBufferPosition [3, 4]
          editor.addCursorAtBufferPosition [3, 14]

          editor.selectToPreviousWordBoundary()

          expect(editor.getSelections().length).toBe 4
          [selection1, selection2, selection3, selection4] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[0,8], [0,4]]
          expect(selection1.isReversed()).toBeTruthy()
          expect(selection2.getBufferRange()).toEqual [[2,0], [1,30]]
          expect(selection2.isReversed()).toBeTruthy()
          expect(selection3.getBufferRange()).toEqual [[3,4], [3,0]]
          expect(selection3.isReversed()).toBeTruthy()
          expect(selection4.getBufferRange()).toEqual [[3,14], [3,13]]
          expect(selection4.isReversed()).toBeTruthy()

      describe ".selectToNextWordBoundary()", ->
        it "select to the next word boundary", ->
          editor.setCursorBufferPosition [0, 8]
          editor.addCursorAtBufferPosition [2, 40]
          editor.addCursorAtBufferPosition [4, 0]
          editor.addCursorAtBufferPosition [3, 30]

          editor.selectToNextWordBoundary()

          expect(editor.getSelections().length).toBe 4
          [selection1, selection2, selection3, selection4] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[0,8], [0,13]]
          expect(selection1.isReversed()).toBeFalsy()
          expect(selection2.getBufferRange()).toEqual [[2,40], [3,0]]
          expect(selection2.isReversed()).toBeFalsy()
          expect(selection3.getBufferRange()).toEqual [[4,0], [4,4]]
          expect(selection3.isReversed()).toBeFalsy()
          expect(selection4.getBufferRange()).toEqual [[3,30], [3,31]]
          expect(selection4.isReversed()).toBeFalsy()

      describe ".selectWord()", ->
        describe "when the cursor is inside a word", ->
          it "selects the entire word", ->
            editor.setCursorScreenPosition([0, 8])
            editor.selectWord()
            expect(editor.getSelectedText()).toBe 'quicksort'

        describe "when the cursor is between two words", ->
          it "selects the word the cursor is on", ->
            editor.setCursorScreenPosition([0, 4])
            editor.selectWord()
            expect(editor.getSelectedText()).toBe 'quicksort'

            editor.setCursorScreenPosition([0, 3])
            editor.selectWord()
            expect(editor.getSelectedText()).toBe 'var'


        describe "when the cursor is inside a region of whitespace", ->
          it "selects the whitespace region", ->
            editor.setCursorScreenPosition([5, 2])
            editor.selectWord()
            expect(editor.getSelectedBufferRange()).toEqual [[5, 0], [5, 6]]

            editor.setCursorScreenPosition([5, 0])
            editor.selectWord()
            expect(editor.getSelectedBufferRange()).toEqual [[5, 0], [5, 6]]

        describe "when the cursor is at the end of the text", ->
          it "select the previous word", ->
            editor.buffer.append 'word'
            editor.moveCursorToBottom()
            editor.selectWord()
            expect(editor.getSelectedBufferRange()).toEqual [[12, 2], [12, 6]]

      describe ".selectToFirstCharacterOfLine()", ->
        it "moves to the first character of the current line or the beginning of the line if it's already on the first character", ->
          editor.setCursorScreenPosition [0,5]
          editor.addCursorAtScreenPosition [1,7]

          editor.selectToFirstCharacterOfLine()

          [cursor1, cursor2] = editor.getCursors()
          expect(cursor1.getBufferPosition()).toEqual [0,0]
          expect(cursor2.getBufferPosition()).toEqual [1,2]

          expect(editor.getSelections().length).toBe 2
          [selection1, selection2] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[0,0], [0,5]]
          expect(selection1.isReversed()).toBeTruthy()
          expect(selection2.getBufferRange()).toEqual [[1,2], [1,7]]
          expect(selection2.isReversed()).toBeTruthy()

          editor.selectToFirstCharacterOfLine()
          [selection1, selection2] = editor.getSelections()
          expect(selection1.getBufferRange()).toEqual [[0,0], [0,5]]
          expect(selection1.isReversed()).toBeTruthy()
          expect(selection2.getBufferRange()).toEqual [[1,0], [1,7]]
          expect(selection2.isReversed()).toBeTruthy()

      describe ".setSelectedBufferRanges(ranges)", ->
        it "clears existing selections and creates selections for each of the given ranges", ->
          editor.setSelectedBufferRanges([[[2, 2], [3, 3]], [[4, 4], [5, 5]]])
          expect(editor.getSelectedBufferRanges()).toEqual [[[2, 2], [3, 3]], [[4, 4], [5, 5]]]

          editor.setSelectedBufferRanges([[[5, 5], [6, 6]]])
          expect(editor.getSelectedBufferRanges()).toEqual [[[5, 5], [6, 6]]]

        it "merges intersecting selections", ->
          editor.setSelectedBufferRanges([[[2, 2], [3, 3]], [[3, 0], [5, 5]]])
          expect(editor.getSelectedBufferRanges()).toEqual [[[2, 2], [5, 5]]]

        it "recyles existing selection instances", ->
          selection = editor.getSelection()
          editor.setSelectedBufferRanges([[[2, 2], [3, 3]], [[4, 4], [5, 5]]])

          [selection1, selection2] = editor.getSelections()
          expect(selection1).toBe selection
          expect(selection1.getBufferRange()).toEqual [[2, 2], [3, 3]]

        describe "when the preserveFolds option is false (the default)", ->
          it "removes folds that contain the selections", ->
            editor.setSelectedBufferRange([[0,0], [0,0]])
            editor.createFold(1, 4)
            editor.createFold(2, 3)
            editor.createFold(6, 8)
            editor.createFold(10, 11)

            editor.setSelectedBufferRanges([[[2, 2], [3, 3]], [[6, 6], [7, 7]]])
            expect(editor.lineForScreenRow(1).fold).toBeUndefined()
            expect(editor.lineForScreenRow(2).fold).toBeUndefined()
            expect(editor.lineForScreenRow(6).fold).toBeUndefined()
            expect(editor.lineForScreenRow(10).fold).toBeDefined()

        describe "when the preserve folds option is true", ->
          it "does not remove folds that contain the selections", ->
            editor.setSelectedBufferRange([[0,0], [0,0]])
            editor.createFold(1, 4)
            editor.createFold(6, 8)
            editor.setSelectedBufferRanges([[[2, 2], [3, 3]], [[6, 0], [6, 1]]], preserveFolds: true)
            expect(editor.isFoldedAtBufferRow(1)).toBeTruthy()
            expect(editor.isFoldedAtBufferRow(6)).toBeTruthy()

      describe ".selectMarker(marker)", ->
        describe "if the marker is valid", ->
          it "selects the marker's range and returns the selected range", ->
            marker = editor.markBufferRange([[0, 1], [3, 3]])
            expect(editor.selectMarker(marker)).toEqual [[0, 1], [3, 3]]
            expect(editor.getSelectedBufferRange()).toEqual [[0, 1], [3, 3]]

        describe "if the marker is invalid", ->
          it "does not change the selection and returns a falsy value", ->
            marker = editor.markBufferRange([[0, 1], [3, 3]])
            marker.destroy()
            expect(editor.selectMarker(marker)).toBeFalsy()
            expect(editor.getSelectedBufferRange()).toEqual [[0, 0], [0, 0]]

      describe ".addSelectionBelow()", ->
        describe "when the selection is non-empty", ->
          it "selects the same region of the line below current selections if possible", ->
            editor.setSelectedBufferRange([[3, 16], [3, 21]])
            editor.addSelectionForBufferRange([[3, 25], [3, 34]])
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 16], [3, 21]]
              [[3, 25], [3, 34]]
              [[4, 16], [4, 21]]
              [[4, 25], [4, 29]]
            ]
            for cursor in editor.getCursors()
              expect(cursor.isVisible()).toBeFalsy()

          it "skips lines that are too short to create a non-empty selection", ->
            editor.setSelectedBufferRange([[3, 31], [3, 38]])
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 31], [3, 38]]
              [[6, 31], [6, 38]]
            ]

          it "honors the original selection's range (goal range) when adding across shorter lines", ->
            editor.setSelectedBufferRange([[3, 22], [3, 38]])
            editor.addSelectionBelow()
            editor.addSelectionBelow()
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 22], [3, 38]]
              [[4, 22], [4, 29]]
              [[5, 22], [5, 30]]
              [[6, 22], [6, 38]]
            ]

          it "clears selection goal ranges when the selection changes", ->
            editor.setSelectedBufferRange([[3, 22], [3, 38]])
            editor.addSelectionBelow()
            editor.selectLeft()
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 22], [3, 37]]
              [[4, 22], [4, 29]]
              [[5, 22], [5, 28]]
            ]

            # goal range from previous add selection is honored next time
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 22], [3, 37]]
              [[4, 22], [4, 29]]
              [[5, 22], [5, 30]] # select to end of line 5 because line 4's goal range was reset by line 3 previously
              [[6, 22], [6, 28]]
            ]

        describe "when the selection is empty", ->
          it "does not skip lines that are shorter than the current column", ->
            editor.setCursorBufferPosition([3, 36])
            editor.addSelectionBelow()
            editor.addSelectionBelow()
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 36], [3, 36]]
              [[4, 29], [4, 29]]
              [[5, 30], [5, 30]]
              [[6, 36], [6, 36]]
            ]

          it "skips empty lines when the column is non-zero", ->
            editor.setCursorBufferPosition([9, 4])
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[9, 4], [9, 4]]
              [[11, 4], [11, 4]]
            ]

          it "does not skip empty lines when the column is zero", ->
            editor.setCursorBufferPosition([9, 0])
            editor.addSelectionBelow()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[9, 0], [9, 0]]
              [[10, 0], [10, 0]]
            ]

      describe ".addSelectionAbove()", ->
        describe "when the selection is non-empty", ->
          it "selects the same region of the line above current selections if possible", ->
            editor.setSelectedBufferRange([[3, 16], [3, 21]])
            editor.addSelectionForBufferRange([[3, 37], [3, 44]])
            editor.addSelectionAbove()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[2, 16], [2, 21]]
              [[2, 37], [2, 40]]
              [[3, 16], [3, 21]]
              [[3, 37], [3, 44]]
            ]
            for cursor in editor.getCursors()
              expect(cursor.isVisible()).toBeFalsy()

          it "skips lines that are too short to create a non-empty selection", ->
            editor.setSelectedBufferRange([[6, 31], [6, 38]])
            editor.addSelectionAbove()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 31], [3, 38]]
              [[6, 31], [6, 38]]
            ]

          it "honors the original selection's range (goal range) when adding across shorter lines", ->
            editor.setSelectedBufferRange([[6, 22], [6, 38]])
            editor.addSelectionAbove()
            editor.addSelectionAbove()
            editor.addSelectionAbove()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 22], [3, 38]]
              [[4, 22], [4, 29]]
              [[5, 22], [5, 30]]
              [[6, 22], [6, 38]]
            ]

        describe "when the selection is empty", ->
          it "does not skip lines that are shorter than the current column", ->
            editor.setCursorBufferPosition([6, 36])
            editor.addSelectionAbove()
            editor.addSelectionAbove()
            editor.addSelectionAbove()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[3, 36], [3, 36]]
              [[4, 29], [4, 29]]
              [[5, 30], [5, 30]]
              [[6, 36], [6, 36]]
            ]

          it "skips empty lines when the column is non-zero", ->
            editor.setCursorBufferPosition([11, 4])
            editor.addSelectionAbove()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[9, 4], [9, 4]]
              [[11, 4], [11, 4]]
            ]

          it "does not skip empty lines when the column is zero", ->
            editor.setCursorBufferPosition([10, 0])
            editor.addSelectionAbove()
            expect(editor.getSelectedBufferRanges()).toEqual [
              [[9, 0], [9, 0]]
              [[10, 0], [10, 0]]
            ]

      describe ".consolidateSelections()", ->
        it "destroys all selections but the most recent, returning true if any selections were destroyed", ->
          editor.setSelectedBufferRange([[3, 16], [3, 21]])
          selection1 = editor.getSelection()
          selection2 = editor.addSelectionForBufferRange([[3, 25], [3, 34]])
          selection3 = editor.addSelectionForBufferRange([[8, 4], [8, 10]])

          expect(editor.getSelections()).toEqual [selection1, selection2, selection3]
          expect(editor.consolidateSelections()).toBeTruthy()
          expect(editor.getSelections()).toEqual [selection3]
          expect(selection3.isEmpty()).toBeFalsy()
          expect(editor.consolidateSelections()).toBeFalsy()
          expect(editor.getSelections()).toEqual [selection3]

      describe "when the cursor is moved while there is a selection", ->
        makeSelection = -> selection.setBufferRange [[1, 2], [1, 5]]

        it "clears the selection", ->
          makeSelection()
          editor.moveCursorDown()
          expect(selection.isEmpty()).toBeTruthy()

          makeSelection()
          editor.moveCursorUp()
          expect(selection.isEmpty()).toBeTruthy()

          makeSelection()
          editor.moveCursorLeft()
          expect(selection.isEmpty()).toBeTruthy()

          makeSelection()
          editor.moveCursorRight()
          expect(selection.isEmpty()).toBeTruthy()

          makeSelection()
          editor.setCursorScreenPosition([3, 3])
          expect(selection.isEmpty()).toBeTruthy()

      it "does not share selections between different edit sessions for the same buffer", ->
        editor2 = atom.project.openSync('sample.js')
        editor.setSelectedBufferRanges([[[1, 2], [3, 4]], [[5, 6], [7, 8]]])
        editor2.setSelectedBufferRanges([[[8, 7], [6, 5]], [[4, 3], [2, 1]]])
        expect(editor2.getSelectedBufferRanges()).not.toEqual editor.getSelectedBufferRanges()

    describe "buffer manipulation", ->
      describe ".insertText(text)", ->
        describe "when there are multiple empty selections", ->
          describe "when the cursors are on the same line", ->
            it "inserts the given text at the location of each cursor and moves the cursors to the end of each cursor's inserted text", ->
              editor.setCursorScreenPosition([1, 2])
              editor.addCursorAtScreenPosition([1, 5])

              editor.insertText('xxx')

              expect(buffer.lineForRow(1)).toBe '  xxxvarxxx sort = function(items) {'
              [cursor1, cursor2] = editor.getCursors()

              expect(cursor1.getBufferPosition()).toEqual [1, 5]
              expect(cursor2.getBufferPosition()).toEqual [1, 11]

          describe "when the cursors are on different lines", ->
            it "inserts the given text at the location of each cursor and moves the cursors to the end of each cursor's inserted text", ->
              editor.setCursorScreenPosition([1, 2])
              editor.addCursorAtScreenPosition([2, 4])

              editor.insertText('xxx')

              expect(buffer.lineForRow(1)).toBe '  xxxvar sort = function(items) {'
              expect(buffer.lineForRow(2)).toBe '    xxxif (items.length <= 1) return items;'
              [cursor1, cursor2] = editor.getCursors()

              expect(cursor1.getBufferPosition()).toEqual [1, 5]
              expect(cursor2.getBufferPosition()).toEqual [2, 7]

        describe "when there are multiple non-empty selections", ->
          describe "when the selections are on the same line", ->
            it "replaces each selection range with the inserted characters", ->
              editor.setSelectedBufferRanges([[[0,4], [0,13]], [[0,22], [0,24]]])
              editor.insertText("x")

              [cursor1, cursor2] = editor.getCursors()
              [selection1, selection2] = editor.getSelections()

              expect(cursor1.getScreenPosition()).toEqual [0, 5]
              expect(cursor2.getScreenPosition()).toEqual [0, 15]
              expect(selection1.isEmpty()).toBeTruthy()
              expect(selection2.isEmpty()).toBeTruthy()

              expect(editor.lineForBufferRow(0)).toBe "var x = functix () {"

          describe "when the selections are on different lines", ->
            it "replaces each selection with the given text, clears the selections, and places the cursor at the end of each selection's inserted text", ->
              editor.setSelectedBufferRanges([[[1, 0], [1, 2]], [[2, 0], [2, 4]]])

              editor.insertText('xxx')

              expect(buffer.lineForRow(1)).toBe 'xxxvar sort = function(items) {'
              expect(buffer.lineForRow(2)).toBe 'xxxif (items.length <= 1) return items;'
              [selection1, selection2] = editor.getSelections()

              expect(selection1.isEmpty()).toBeTruthy()
              expect(selection1.cursor.getBufferPosition()).toEqual [1, 3]
              expect(selection2.isEmpty()).toBeTruthy()
              expect(selection2.cursor.getBufferPosition()).toEqual [2, 3]

        describe "when there is a selection that ends on a folded line", ->
          it "destroys the selection", ->
            editor.createFold(2,4)
            editor.setSelectedBufferRange([[1,0], [2,0]])
            editor.insertText('holy cow')
            expect(editor.lineForScreenRow(2).fold).toBeUndefined()

      describe ".insertNewline()", ->
        describe "when there is a single cursor", ->
          describe "when the cursor is at the beginning of a line", ->
            it "inserts an empty line before it", ->
              editor.setCursorScreenPosition(row: 1, column: 0)

              editor.insertNewline()

              expect(buffer.lineForRow(1)).toBe ''
              expect(editor.getCursorScreenPosition()).toEqual(row: 2, column: 0)

          describe "when the cursor is in the middle of a line", ->
            it "splits the current line to form a new line", ->
              editor.setCursorScreenPosition(row: 1, column: 6)
              originalLine = buffer.lineForRow(1)
              lineBelowOriginalLine = buffer.lineForRow(2)

              editor.insertNewline()

              expect(buffer.lineForRow(1)).toBe originalLine[0...6]
              expect(buffer.lineForRow(2)).toBe originalLine[6..]
              expect(buffer.lineForRow(3)).toBe lineBelowOriginalLine
              expect(editor.getCursorScreenPosition()).toEqual(row: 2, column: 0)

          describe "when the cursor is on the end of a line", ->
            it "inserts an empty line after it", ->
              editor.setCursorScreenPosition(row: 1, column: buffer.lineForRow(1).length)

              editor.insertNewline()

              expect(buffer.lineForRow(2)).toBe ''
              expect(editor.getCursorScreenPosition()).toEqual(row: 2, column: 0)

        describe "when there are multiple cursors", ->
          describe "when the cursors are on the same line", ->
            it "breaks the line at the cursor locations", ->
              editor.setCursorScreenPosition([3, 13])
              editor.addCursorAtScreenPosition([3, 38])

              editor.insertNewline()

              expect(editor.lineForBufferRow(3)).toBe "    var pivot"
              expect(editor.lineForBufferRow(4)).toBe " = items.shift(), current"
              expect(editor.lineForBufferRow(5)).toBe ", left = [], right = [];"
              expect(editor.lineForBufferRow(6)).toBe "    while(items.length > 0) {"

              [cursor1, cursor2] = editor.getCursors()
              expect(cursor1.getBufferPosition()).toEqual [4, 0]
              expect(cursor2.getBufferPosition()).toEqual [5, 0]

          describe "when the cursors are on different lines", ->
            it "inserts newlines at each cursor location", ->
              editor.setCursorScreenPosition([3, 0])
              editor.addCursorAtScreenPosition([6, 0])

              editor.insertText("\n")
              expect(editor.lineForBufferRow(3)).toBe ""
              expect(editor.lineForBufferRow(4)).toBe "    var pivot = items.shift(), current, left = [], right = [];"
              expect(editor.lineForBufferRow(5)).toBe "    while(items.length > 0) {"
              expect(editor.lineForBufferRow(6)).toBe "      current = items.shift();"
              expect(editor.lineForBufferRow(7)).toBe ""
              expect(editor.lineForBufferRow(8)).toBe "      current < pivot ? left.push(current) : right.push(current);"
              expect(editor.lineForBufferRow(9)).toBe "    }"

              [cursor1, cursor2] = editor.getCursors()
              expect(cursor1.getBufferPosition()).toEqual [4,0]
              expect(cursor2.getBufferPosition()).toEqual [8,0]

      describe ".insertNewlineBelow()", ->
        describe "when the operation is undone", ->
          it "places the cursor back at the previous location", ->
            editor.setCursorBufferPosition([0,2])
            editor.insertNewlineBelow()
            expect(editor.getCursorBufferPosition()).toEqual [1,0]
            editor.undo()
            expect(editor.getCursorBufferPosition()).toEqual [0,2]

        it "inserts a newline below the cursor's current line, autoindents it, and moves the cursor to the end of the line", ->
          atom.config.set("editor.autoIndent", true)
          editor.insertNewlineBelow()
          expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
          expect(buffer.lineForRow(1)).toBe "  "
          expect(editor.getCursorBufferPosition()).toEqual [1, 2]

      describe ".insertNewlineAbove()", ->
        describe "when the cursor is on first line", ->
          it "inserts a newline on the first line and moves the cursor to the first line", ->
            editor.setCursorBufferPosition([0])
            editor.insertNewlineAbove()
            expect(editor.getCursorBufferPosition()).toEqual [0,0]
            expect(editor.lineForBufferRow(0)).toBe ''
            expect(editor.lineForBufferRow(1)).toBe 'var quicksort = function () {'
            expect(editor.buffer.getLineCount()).toBe 14

        describe "when the cursor is not on the first line", ->
          it "inserts a newline above the current line and moves the cursor to the inserted line", ->
            editor.setCursorBufferPosition([3,4])
            editor.insertNewlineAbove()
            expect(editor.getCursorBufferPosition()).toEqual [3,0]
            expect(editor.lineForBufferRow(3)).toBe ''
            expect(editor.lineForBufferRow(4)).toBe '    var pivot = items.shift(), current, left = [], right = [];'
            expect(editor.buffer.getLineCount()).toBe 14

            editor.undo()
            expect(editor.getCursorBufferPosition()).toEqual [3,4]

      describe ".backspace()", ->
        describe "when there is a single cursor", ->
          changeScreenRangeHandler = null

          beforeEach ->
            selection = editor.getLastSelection()
            changeScreenRangeHandler = jasmine.createSpy('changeScreenRangeHandler')
            selection.on 'screen-range-changed', changeScreenRangeHandler

          describe "when the cursor is on the middle of the line", ->
            it "removes the character before the cursor", ->
              editor.setCursorScreenPosition(row: 1, column: 7)
              expect(buffer.lineForRow(1)).toBe "  var sort = function(items) {"

              editor.backspace()

              line = buffer.lineForRow(1)
              expect(line).toBe "  var ort = function(items) {"
              expect(editor.getCursorScreenPosition()).toEqual {row: 1, column: 6}
              expect(changeScreenRangeHandler).toHaveBeenCalled()
              expect(editor.getCursor().isVisible()).toBeTruthy()

          describe "when the cursor is at the beginning of a line", ->
            it "joins it with the line above", ->
              originalLine0 = buffer.lineForRow(0)
              expect(originalLine0).toBe "var quicksort = function () {"
              expect(buffer.lineForRow(1)).toBe "  var sort = function(items) {"

              editor.setCursorScreenPosition(row: 1, column: 0)
              editor.backspace()

              line0 = buffer.lineForRow(0)
              line1 = buffer.lineForRow(1)
              expect(line0).toBe "var quicksort = function () {  var sort = function(items) {"
              expect(line1).toBe "    if (items.length <= 1) return items;"
              expect(editor.getCursorScreenPosition()).toEqual [0, originalLine0.length]

              expect(changeScreenRangeHandler).toHaveBeenCalled()

          describe "when the cursor is at the first column of the first line", ->
            it "does nothing, but doesn't raise an error", ->
              editor.setCursorScreenPosition(row: 0, column: 0)
              editor.backspace()

          describe "when the cursor is on the first column of a line below a fold", ->
            it "deletes the folded lines", ->
              editor.setCursorScreenPosition([4,0])
              editor.foldCurrentRow()
              editor.setCursorScreenPosition([5,0])
              editor.backspace()

              expect(buffer.lineForRow(4)).toBe "    return sort(left).concat(pivot).concat(sort(right));"
              expect(buffer.lineForRow(4).fold).toBeUndefined()

          describe "when the cursor is in the middle of a line below a fold", ->
            it "backspaces as normal", ->
              editor.setCursorScreenPosition([4,0])
              editor.foldCurrentRow()
              editor.setCursorScreenPosition([5,5])
              editor.backspace()

              expect(buffer.lineForRow(7)).toBe "    }"
              expect(buffer.lineForRow(8)).toBe "    eturn sort(left).concat(pivot).concat(sort(right));"

          describe "when the cursor is on a folded screen line", ->
            it "deletes all of the folded lines along with the fold", ->
              editor.setCursorBufferPosition([3, 0])
              editor.foldCurrentRow()
              editor.backspace()

              expect(buffer.lineForRow(1)).toBe ""
              expect(buffer.lineForRow(2)).toBe "  return sort(Array.apply(this, arguments));"
              expect(editor.getCursorScreenPosition()).toEqual [1, 0]

        describe "when there are multiple cursors", ->
          describe "when cursors are on the same line", ->
            it "removes the characters preceding each cursor", ->
              editor.setCursorScreenPosition([3, 13])
              editor.addCursorAtScreenPosition([3, 38])

              editor.backspace()

              expect(editor.lineForBufferRow(3)).toBe "    var pivo = items.shift(), curren, left = [], right = [];"

              [cursor1, cursor2] = editor.getCursors()
              expect(cursor1.getBufferPosition()).toEqual [3, 12]
              expect(cursor2.getBufferPosition()).toEqual [3, 36]

              [selection1, selection2] = editor.getSelections()
              expect(selection1.isEmpty()).toBeTruthy()
              expect(selection2.isEmpty()).toBeTruthy()

          describe "when cursors are on different lines", ->
            describe "when the cursors are in the middle of their lines", ->
              it "removes the characters preceding each cursor", ->
                editor.setCursorScreenPosition([3, 13])
                editor.addCursorAtScreenPosition([4, 10])

                editor.backspace()

                expect(editor.lineForBufferRow(3)).toBe "    var pivo = items.shift(), current, left = [], right = [];"
                expect(editor.lineForBufferRow(4)).toBe "    whileitems.length > 0) {"

                [cursor1, cursor2] = editor.getCursors()
                expect(cursor1.getBufferPosition()).toEqual [3, 12]
                expect(cursor2.getBufferPosition()).toEqual [4, 9]

                [selection1, selection2] = editor.getSelections()
                expect(selection1.isEmpty()).toBeTruthy()
                expect(selection2.isEmpty()).toBeTruthy()

            describe "when the cursors are on the first column of their lines", ->
              it "removes the newlines preceding each cursor", ->
                editor.setCursorScreenPosition([3, 0])
                editor.addCursorAtScreenPosition([6, 0])

                editor.backspace()
                expect(editor.lineForBufferRow(2)).toBe "    if (items.length <= 1) return items;    var pivot = items.shift(), current, left = [], right = [];"
                expect(editor.lineForBufferRow(3)).toBe "    while(items.length > 0) {"
                expect(editor.lineForBufferRow(4)).toBe "      current = items.shift();      current < pivot ? left.push(current) : right.push(current);"
                expect(editor.lineForBufferRow(5)).toBe "    }"

                [cursor1, cursor2] = editor.getCursors()
                expect(cursor1.getBufferPosition()).toEqual [2,40]
                expect(cursor2.getBufferPosition()).toEqual [4,30]

        describe "when there is a single selection", ->
          it "deletes the selection, but not the character before it", ->
            editor.setSelectedBufferRange([[0,5], [0,9]])
            editor.backspace()
            expect(editor.buffer.lineForRow(0)).toBe 'var qsort = function () {'

          describe "when the selection ends on a folded line", ->
            it "preserves the fold", ->
              editor.setSelectedBufferRange([[3,0], [4,0]])
              editor.foldBufferRow(4)
              editor.backspace()

              expect(buffer.lineForRow(3)).toBe "    while(items.length > 0) {"
              expect(editor.lineForScreenRow(3).fold).toBeDefined()

        describe "when there are multiple selections", ->
          it "removes all selected text", ->
            editor.setSelectedBufferRanges([[[0,4], [0,13]], [[0,16], [0,24]]])
            editor.backspace()
            expect(editor.lineForBufferRow(0)).toBe 'var  =  () {'

      describe ".backspaceToBeginningOfWord()", ->
        describe "when no text is selected", ->
          it "deletes all text between the cursor and the beginning of the word", ->
            editor.setCursorBufferPosition([1, 24])
            editor.addCursorAtBufferPosition([3, 5])
            [cursor1, cursor2] = editor.getCursors()

            editor.backspaceToBeginningOfWord()
            expect(buffer.lineForRow(1)).toBe '  var sort = function(ems) {'
            expect(buffer.lineForRow(3)).toBe '    ar pivot = items.shift(), current, left = [], right = [];'
            expect(cursor1.getBufferPosition()).toEqual [1, 22]
            expect(cursor2.getBufferPosition()).toEqual [3, 4]

            editor.backspaceToBeginningOfWord()
            expect(buffer.lineForRow(1)).toBe '  var sort = functionems) {'
            expect(buffer.lineForRow(2)).toBe '    if (items.length <= 1) return itemsar pivot = items.shift(), current, left = [], right = [];'
            expect(cursor1.getBufferPosition()).toEqual [1, 21]
            expect(cursor2.getBufferPosition()).toEqual [2, 39]

            editor.backspaceToBeginningOfWord()
            expect(buffer.lineForRow(1)).toBe '  var sort = ems) {'
            expect(buffer.lineForRow(2)).toBe '    if (items.length <= 1) return ar pivot = items.shift(), current, left = [], right = [];'
            expect(cursor1.getBufferPosition()).toEqual [1, 13]
            expect(cursor2.getBufferPosition()).toEqual [2, 34]

        describe "when text is selected", ->
          it "deletes only selected text", ->
            editor.setSelectedBufferRanges([[[1, 24], [1, 27]], [[2, 0], [2, 4]]])
            editor.backspaceToBeginningOfWord()
            expect(buffer.lineForRow(1)).toBe '  var sort = function(it) {'
            expect(buffer.lineForRow(2)).toBe 'if (items.length <= 1) return items;'

      describe ".backspaceToBeginningOfLine()", ->
        describe "when no text is selected", ->
          it "deletes all text between the cursor and the beginning of the line", ->
            editor.setCursorBufferPosition([1, 24])
            editor.addCursorAtBufferPosition([2, 5])
            [cursor1, cursor2] = editor.getCursors()

            editor.backspaceToBeginningOfLine()
            expect(buffer.lineForRow(1)).toBe 'ems) {'
            expect(buffer.lineForRow(2)).toBe 'f (items.length <= 1) return items;'
            expect(cursor1.getBufferPosition()).toEqual [1, 0]
            expect(cursor2.getBufferPosition()).toEqual [2, 0]

          describe "when at the beginning of the line", ->
            it "deletes the newline", ->
              editor.setCursorBufferPosition([2])
              editor.backspaceToBeginningOfLine()
              expect(buffer.lineForRow(1)).toBe '  var sort = function(items) {    if (items.length <= 1) return items;'

        describe "when text is selected", ->
          it "still deletes all text to begginning of the line", ->
            editor.setSelectedBufferRanges([[[1, 24], [1, 27]], [[2, 0], [2, 4]]])
            editor.backspaceToBeginningOfLine()
            expect(buffer.lineForRow(1)).toBe 'ems) {'
            expect(buffer.lineForRow(2)).toBe '    if (items.length <= 1) return items;'

      describe ".delete()", ->
        describe "when there is a single cursor", ->
          describe "when the cursor is on the middle of a line", ->
            it "deletes the character following the cursor", ->
              editor.setCursorScreenPosition([1, 6])
              editor.delete()
              expect(buffer.lineForRow(1)).toBe '  var ort = function(items) {'

          describe "when the cursor is on the end of a line", ->
            it "joins the line with the following line", ->
              editor.setCursorScreenPosition([1, buffer.lineForRow(1).length])
              editor.delete()
              expect(buffer.lineForRow(1)).toBe '  var sort = function(items) {    if (items.length <= 1) return items;'

          describe "when the cursor is on the last column of the last line", ->
            it "does nothing, but doesn't raise an error", ->
              editor.setCursorScreenPosition([12, buffer.lineForRow(12).length])
              editor.delete()
              expect(buffer.lineForRow(12)).toBe '};'

          describe "when the cursor is on the end of a line above a fold", ->
            it "only deletes the lines inside the fold", ->
              editor.foldBufferRow(4)
              editor.setCursorScreenPosition([3, Infinity])
              cursorPositionBefore = editor.getCursorScreenPosition()

              editor.delete()

              expect(buffer.lineForRow(3)).toBe "    var pivot = items.shift(), current, left = [], right = [];"
              expect(buffer.lineForRow(4)).toBe "    return sort(left).concat(pivot).concat(sort(right));"
              expect(editor.getCursorScreenPosition()).toEqual cursorPositionBefore

          describe "when the cursor is in the middle a line above a fold", ->
            it "deletes as normal", ->
              editor.foldBufferRow(4)
              editor.setCursorScreenPosition([3, 4])
              cursorPositionBefore = editor.getCursorScreenPosition()

              editor.delete()

              expect(buffer.lineForRow(3)).toBe "    ar pivot = items.shift(), current, left = [], right = [];"
              expect(editor.lineForScreenRow(4).fold).toBeDefined()
              expect(editor.getCursorScreenPosition()).toEqual [3, 4]

          describe "when the cursor is on a folded line", ->
            it "removes the lines contained by the fold", ->
              editor.setSelectedBufferRange([[2, 0], [2, 0]])
              editor.createFold(2,4)
              editor.createFold(2,6)
              oldLine7 = buffer.lineForRow(7)
              oldLine8 = buffer.lineForRow(8)

              editor.delete()
              expect(editor.lineForScreenRow(2).text).toBe oldLine7
              expect(editor.lineForScreenRow(3).text).toBe oldLine8

        describe "when there are multiple cursors", ->
          describe "when cursors are on the same line", ->
            it "removes the characters following each cursor", ->
              editor.setCursorScreenPosition([3, 13])
              editor.addCursorAtScreenPosition([3, 38])

              editor.delete()

              expect(editor.lineForBufferRow(3)).toBe "    var pivot= items.shift(), current left = [], right = [];"

              [cursor1, cursor2] = editor.getCursors()
              expect(cursor1.getBufferPosition()).toEqual [3, 13]
              expect(cursor2.getBufferPosition()).toEqual [3, 37]

              [selection1, selection2] = editor.getSelections()
              expect(selection1.isEmpty()).toBeTruthy()
              expect(selection2.isEmpty()).toBeTruthy()

          describe "when cursors are on different lines", ->
            describe "when the cursors are in the middle of the lines", ->
              it "removes the characters following each cursor", ->
                editor.setCursorScreenPosition([3, 13])
                editor.addCursorAtScreenPosition([4, 10])

                editor.delete()

                expect(editor.lineForBufferRow(3)).toBe "    var pivot= items.shift(), current, left = [], right = [];"
                expect(editor.lineForBufferRow(4)).toBe "    while(tems.length > 0) {"

                [cursor1, cursor2] = editor.getCursors()
                expect(cursor1.getBufferPosition()).toEqual [3, 13]
                expect(cursor2.getBufferPosition()).toEqual [4, 10]

                [selection1, selection2] = editor.getSelections()
                expect(selection1.isEmpty()).toBeTruthy()
                expect(selection2.isEmpty()).toBeTruthy()

            describe "when the cursors are at the end of their lines", ->
              it "removes the newlines following each cursor", ->
                editor.setCursorScreenPosition([0, 29])
                editor.addCursorAtScreenPosition([1, 30])

                editor.delete()

                expect(editor.lineForBufferRow(0)).toBe "var quicksort = function () {  var sort = function(items) {    if (items.length <= 1) return items;"

                [cursor1, cursor2] = editor.getCursors()
                expect(cursor1.getBufferPosition()).toEqual [0,29]
                expect(cursor2.getBufferPosition()).toEqual [0,59]

        describe "when there is a single selection", ->
          it "deletes the selection, but not the character following it", ->
            editor.setSelectedBufferRanges([[[1, 24], [1, 27]], [[2, 0], [2, 4]]])
            editor.delete()
            expect(buffer.lineForRow(1)).toBe '  var sort = function(it) {'
            expect(buffer.lineForRow(2)).toBe 'if (items.length <= 1) return items;'
            expect(editor.getSelection().isEmpty()).toBeTruthy()

        describe "when there are multiple selections", ->
          describe "when selections are on the same line", ->
            it "removes all selected text", ->
              editor.setSelectedBufferRanges([[[0,4], [0,13]], [[0,16], [0,24]]])
              editor.delete()
              expect(editor.lineForBufferRow(0)).toBe 'var  =  () {'

      describe ".deleteToEndOfWord()", ->
        describe "when no text is selected", ->
          it "deletes to the end of the word", ->
            editor.setCursorBufferPosition([1, 24])
            editor.addCursorAtBufferPosition([2, 5])
            [cursor1, cursor2] = editor.getCursors()

            editor.deleteToEndOfWord()
            expect(buffer.lineForRow(1)).toBe '  var sort = function(it) {'
            expect(buffer.lineForRow(2)).toBe '    i (items.length <= 1) return items;'
            expect(cursor1.getBufferPosition()).toEqual [1, 24]
            expect(cursor2.getBufferPosition()).toEqual [2, 5]

            editor.deleteToEndOfWord()
            expect(buffer.lineForRow(1)).toBe '  var sort = function(it {'
            expect(buffer.lineForRow(2)).toBe '    iitems.length <= 1) return items;'
            expect(cursor1.getBufferPosition()).toEqual [1, 24]
            expect(cursor2.getBufferPosition()).toEqual [2, 5]

        describe "when text is selected", ->
          it "deletes only selected text", ->
            editor.setSelectedBufferRange([[1, 24], [1, 27]])
            editor.deleteToEndOfWord()
            expect(buffer.lineForRow(1)).toBe '  var sort = function(it) {'

      describe ".indent()", ->
        describe "when the selection is empty", ->
          describe "when autoIndent is disabled", ->
            describe "if 'softTabs' is true (the default)", ->
              it "inserts 'tabLength' spaces into the buffer", ->
                tabRegex = new RegExp("^[ ]{#{editor.getTabLength()}}")
                expect(buffer.lineForRow(0)).not.toMatch(tabRegex)
                editor.indent()
                expect(buffer.lineForRow(0)).toMatch(tabRegex)

            describe "if 'softTabs' is false", ->
              it "insert a \t into the buffer", ->
                editor.setSoftTabs(false)
                expect(buffer.lineForRow(0)).not.toMatch(/^\t/)
                editor.indent()
                expect(buffer.lineForRow(0)).toMatch(/^\t/)

          describe "when autoIndent is enabled", ->
            describe "when the cursor's column is less than the suggested level of indentation", ->
              describe "when 'softTabs' is true (the default)", ->
                it "moves the cursor to the end of the leading whitespace and inserts enough whitespace to bring the line to the suggested level of indentaion", ->
                  buffer.insert([5, 0], "  \n")
                  editor.setCursorBufferPosition [5, 0]
                  editor.indent(autoIndent: true)
                  expect(buffer.lineForRow(5)).toMatch /^\s+$/
                  expect(buffer.lineForRow(5).length).toBe 6
                  expect(editor.getCursorBufferPosition()).toEqual [5, 6]

              describe "when 'softTabs' is false", ->
                it "moves the cursor to the end of the leading whitespace and inserts enough tabs to bring the line to the suggested level of indentaion", ->
                  convertToHardTabs(buffer)
                  editor.setSoftTabs(false)
                  buffer.insert([5, 0], "\t\n")
                  editor.setCursorBufferPosition [5, 0]
                  editor.indent(autoIndent: true)
                  expect(buffer.lineForRow(5)).toMatch /^\t\t\t$/
                  expect(editor.getCursorBufferPosition()).toEqual [5, 3]

            describe "when the line's indent level is greater than the suggested level of indentation", ->
              describe "when 'softTabs' is true (the default)", ->
                it "moves the cursor to the end of the leading whitespace and inserts 'tabLength' spaces into the buffer", ->
                  buffer.insert([7, 0], "      \n")
                  editor.setCursorBufferPosition [7, 2]
                  editor.indent(autoIndent: true)
                  expect(buffer.lineForRow(7)).toMatch /^\s+$/
                  expect(buffer.lineForRow(7).length).toBe 8
                  expect(editor.getCursorBufferPosition()).toEqual [7, 8]

              describe "when 'softTabs' is false", ->
                it "moves the cursor to the end of the leading whitespace and inserts \t into the buffer", ->
                  convertToHardTabs(buffer)
                  editor.setSoftTabs(false)
                  buffer.insert([7, 0], "\t\t\t\n")
                  editor.setCursorBufferPosition [7, 1]
                  editor.indent(autoIndent: true)
                  expect(buffer.lineForRow(7)).toMatch /^\t\t\t\t$/
                  expect(editor.getCursorBufferPosition()).toEqual [7, 4]

        describe "when the selection is not empty", ->
          it "indents the selected lines", ->
            editor.setSelectedBufferRange([[0, 0], [10, 0]])
            selection = editor.getSelection()
            spyOn(selection, "indentSelectedRows")
            editor.indent()
            expect(selection.indentSelectedRows).toHaveBeenCalled()

        describe "if editor.softTabs is false", ->
          it "inserts a tab character into the buffer", ->
            editor.setSoftTabs(false)
            expect(buffer.lineForRow(0)).not.toMatch(/^\t/)
            editor.indent()
            expect(buffer.lineForRow(0)).toMatch(/^\t/)
            expect(editor.getCursorBufferPosition()).toEqual [0, 1]
            expect(editor.getCursorScreenPosition()).toEqual [0, editor.getTabLength()]

            editor.indent()
            expect(buffer.lineForRow(0)).toMatch(/^\t\t/)
            expect(editor.getCursorBufferPosition()).toEqual [0, 2]
            expect(editor.getCursorScreenPosition()).toEqual [0, editor.getTabLength() * 2]

      describe "pasteboard operations", ->
        beforeEach ->
          editor.setSelectedBufferRanges([[[0, 4], [0, 13]], [[1, 6], [1, 10]]])

        describe ".cutSelectedText()", ->
          it "removes the selected text from the buffer and places it on the pasteboard", ->
            editor.cutSelectedText()
            expect(buffer.lineForRow(0)).toBe "var  = function () {"
            expect(buffer.lineForRow(1)).toBe "  var  = function(items) {"

            expect(clipboard.readText()).toBe 'quicksort\nsort'

        describe ".cutToEndOfLine()", ->
          describe "when soft wrap is on", ->
            it "cuts up to the end of the line", ->
              editor.setSoftWrap(true)
              editor.setEditorWidthInChars(10)
              editor.setCursorScreenPosition([2, 2])
              editor.cutToEndOfLine()
              expect(editor.lineForScreenRow(2).text).toBe '=  () {'

          describe "when soft wrap is off", ->
            describe "when nothing is selected", ->
              it "cuts up to the end of the line", ->
                editor.setCursorBufferPosition([2, 20])
                editor.addCursorAtBufferPosition([3, 20])
                editor.cutToEndOfLine()
                expect(buffer.lineForRow(2)).toBe '    if (items.length'
                expect(buffer.lineForRow(3)).toBe '    var pivot = item'
                expect(atom.pasteboard.read()[0]).toBe ' <= 1) return items;\ns.shift(), current, left = [], right = [];'

            describe "when text is selected", ->
              it "only cuts the selected text, not to the end of the line", ->
                editor.setSelectedBufferRanges([[[2,20], [2, 30]], [[3, 20], [3, 20]]])

                editor.cutToEndOfLine()

                expect(buffer.lineForRow(2)).toBe '    if (items.lengthurn items;'
                expect(buffer.lineForRow(3)).toBe '    var pivot = item'
                expect(atom.pasteboard.read()[0]).toBe ' <= 1) ret\ns.shift(), current, left = [], right = [];'

        describe ".copySelectedText()", ->
          it "copies selected text onto the clipboard", ->
            editor.copySelectedText()
            expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
            expect(buffer.lineForRow(1)).toBe "  var sort = function(items) {"
            expect(clipboard.readText()).toBe 'quicksort\nsort'

        describe ".pasteText()", ->
          it "pastes text into the buffer", ->
            atom.pasteboard.write('first')
            editor.pasteText()
            expect(editor.buffer.lineForRow(0)).toBe "var first = function () {"
            expect(buffer.lineForRow(1)).toBe "  var first = function(items) {"

      describe ".indentSelectedRows()", ->
        describe "when nothing is selected", ->
          describe "when softTabs is enabled", ->
            it "indents line and retains selection", ->
              editor.setSelectedBufferRange([[0,3], [0,3]])
              editor.indentSelectedRows()
              expect(buffer.lineForRow(0)).toBe "  var quicksort = function () {"
              expect(editor.getSelectedBufferRange()).toEqual [[0, 3 + editor.getTabLength()], [0, 3 + editor.getTabLength()]]

          describe "when softTabs is disabled", ->
            it "indents line and retains selection", ->
              convertToHardTabs(buffer)
              editor.setSoftTabs(false)
              editor.setSelectedBufferRange([[0,3], [0,3]])
              editor.indentSelectedRows()
              expect(buffer.lineForRow(0)).toBe "\tvar quicksort = function () {"
              expect(editor.getSelectedBufferRange()).toEqual [[0, 3 + 1], [0, 3 + 1]]

        describe "when one line is selected", ->
          describe "when softTabs is enabled", ->
            it "indents line and retains selection", ->
              editor.setSelectedBufferRange([[0,4], [0,14]])
              editor.indentSelectedRows()
              expect(buffer.lineForRow(0)).toBe "#{editor.getTabText()}var quicksort = function () {"
              expect(editor.getSelectedBufferRange()).toEqual [[0, 4 + editor.getTabLength()], [0, 14 + editor.getTabLength()]]

          describe "when softTabs is disabled", ->
            it "indents line and retains selection", ->
              convertToHardTabs(buffer)
              editor.setSoftTabs(false)
              editor.setSelectedBufferRange([[0,4], [0,14]])
              editor.indentSelectedRows()
              expect(buffer.lineForRow(0)).toBe "\tvar quicksort = function () {"
              expect(editor.getSelectedBufferRange()).toEqual [[0, 4 + 1], [0, 14 + 1]]

        describe "when multiple lines are selected", ->
          describe "when softTabs is enabled", ->
            it "indents selected lines (that are not empty) and retains selection", ->
              editor.setSelectedBufferRange([[9,1], [11,15]])
              editor.indentSelectedRows()
              expect(buffer.lineForRow(9)).toBe "    };"
              expect(buffer.lineForRow(10)).toBe ""
              expect(buffer.lineForRow(11)).toBe "    return sort(Array.apply(this, arguments));"
              expect(editor.getSelectedBufferRange()).toEqual [[9, 1 + editor.getTabLength()], [11, 15 + editor.getTabLength()]]

            it "does not indent the last row if the selection ends at column 0", ->
              editor.setSelectedBufferRange([[9,1], [11,0]])
              editor.indentSelectedRows()
              expect(buffer.lineForRow(9)).toBe "    };"
              expect(buffer.lineForRow(10)).toBe ""
              expect(buffer.lineForRow(11)).toBe "  return sort(Array.apply(this, arguments));"
              expect(editor.getSelectedBufferRange()).toEqual [[9, 1 + editor.getTabLength()], [11, 0]]

          describe "when softTabs is disabled", ->
            it "indents selected lines (that are not empty) and retains selection", ->
              convertToHardTabs(buffer)
              editor.setSoftTabs(false)
              editor.setSelectedBufferRange([[9,1], [11,15]])
              editor.indentSelectedRows()
              expect(buffer.lineForRow(9)).toBe "\t\t};"
              expect(buffer.lineForRow(10)).toBe ""
              expect(buffer.lineForRow(11)).toBe "\t\treturn sort(Array.apply(this, arguments));"
              expect(editor.getSelectedBufferRange()).toEqual [[9, 1 + 1], [11, 15 + 1]]

      describe ".outdentSelectedRows()", ->
        describe "when nothing is selected", ->
          it "outdents line and retains selection", ->
            editor.setSelectedBufferRange([[1,3], [1,3]])
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(1)).toBe "var sort = function(items) {"
            expect(editor.getSelectedBufferRange()).toEqual [[1, 3 - editor.getTabLength()], [1, 3 - editor.getTabLength()]]

          it "outdents when indent is less than a tab length", ->
            editor.insertText(' ')
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"

          it "outdents a single hard tab when indent is multiple hard tabs and and the session is using soft tabs", ->
            editor.insertText('\t\t')
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe "\tvar quicksort = function () {"
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"

          it "outdents when a mix of hard tabs and soft tabs are used", ->
            editor.insertText('\t   ')
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe "   var quicksort = function () {"
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe " var quicksort = function () {"
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"

        describe "when one line is selected", ->
          it "outdents line and retains editor", ->
            editor.setSelectedBufferRange([[1,4], [1,14]])
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(1)).toBe "var sort = function(items) {"
            expect(editor.getSelectedBufferRange()).toEqual [[1, 4 - editor.getTabLength()], [1, 14 - editor.getTabLength()]]

        describe "when multiple lines are selected", ->
          it "outdents selected lines and retains editor", ->
            editor.setSelectedBufferRange([[0,1], [3,15]])
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
            expect(buffer.lineForRow(1)).toBe "var sort = function(items) {"
            expect(buffer.lineForRow(2)).toBe "  if (items.length <= 1) return items;"
            expect(buffer.lineForRow(3)).toBe "  var pivot = items.shift(), current, left = [], right = [];"
            expect(editor.getSelectedBufferRange()).toEqual [[0, 1], [3, 15 - editor.getTabLength()]]

          it "does not outdent the last line of the selection if it ends at column 0", ->
            editor.setSelectedBufferRange([[0,1], [3,0]])
            editor.outdentSelectedRows()
            expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
            expect(buffer.lineForRow(1)).toBe "var sort = function(items) {"
            expect(buffer.lineForRow(2)).toBe "  if (items.length <= 1) return items;"
            expect(buffer.lineForRow(3)).toBe "    var pivot = items.shift(), current, left = [], right = [];"

            expect(editor.getSelectedBufferRange()).toEqual [[0, 1], [3, 0]]

      describe ".toggleLineCommentsInSelection()", ->
        it "toggles comments on the selected lines", ->
          editor.setSelectedBufferRange([[4, 5], [7, 5]])
          editor.toggleLineCommentsInSelection()

          expect(buffer.lineForRow(4)).toBe "    // while(items.length > 0) {"
          expect(buffer.lineForRow(5)).toBe "    //   current = items.shift();"
          expect(buffer.lineForRow(6)).toBe "    //   current < pivot ? left.push(current) : right.push(current);"
          expect(buffer.lineForRow(7)).toBe "    // }"
          expect(editor.getSelectedBufferRange()).toEqual [[4, 8], [7, 8]]

          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(4)).toBe "    while(items.length > 0) {"
          expect(buffer.lineForRow(5)).toBe "      current = items.shift();"
          expect(buffer.lineForRow(6)).toBe "      current < pivot ? left.push(current) : right.push(current);"
          expect(buffer.lineForRow(7)).toBe "    }"

        it "does not comment the last line of a non-empty selection if it ends at column 0", ->
          editor.setSelectedBufferRange([[4, 5], [7, 0]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(4)).toBe "    // while(items.length > 0) {"
          expect(buffer.lineForRow(5)).toBe "    //   current = items.shift();"
          expect(buffer.lineForRow(6)).toBe "    //   current < pivot ? left.push(current) : right.push(current);"
          expect(buffer.lineForRow(7)).toBe "    }"

        it "uncomments lines if all lines match the comment regex", ->
          editor.setSelectedBufferRange([[0, 0], [0, 1]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(0)).toBe "// var quicksort = function () {"

          editor.setSelectedBufferRange([[0, 0], [2, Infinity]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(0)).toBe "// // var quicksort = function () {"
          expect(buffer.lineForRow(1)).toBe "//   var sort = function(items) {"
          expect(buffer.lineForRow(2)).toBe "//     if (items.length <= 1) return items;"

          editor.setSelectedBufferRange([[0, 0], [2, Infinity]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(0)).toBe "// var quicksort = function () {"
          expect(buffer.lineForRow(1)).toBe "  var sort = function(items) {"
          expect(buffer.lineForRow(2)).toBe "    if (items.length <= 1) return items;"

          editor.setSelectedBufferRange([[0, 0], [0, Infinity]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"

        it "uncomments commented lines separated by an empty line", ->
          editor.setSelectedBufferRange([[0, 0], [1, Infinity]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(0)).toBe "// var quicksort = function () {"
          expect(buffer.lineForRow(1)).toBe "//   var sort = function(items) {"

          buffer.insert([0, Infinity], '\n')

          editor.setSelectedBufferRange([[0, 0], [2, Infinity]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(0)).toBe "var quicksort = function () {"
          expect(buffer.lineForRow(1)).toBe ""
          expect(buffer.lineForRow(2)).toBe "  var sort = function(items) {"

        it "preserves selection emptiness", ->
          editor.setCursorBufferPosition([4, 0])
          editor.toggleLineCommentsInSelection()
          expect(editor.getSelection().isEmpty()).toBeTruthy()

        it "does not explode if the current language mode has no comment regex", ->
          editor.destroy()
          editor = atom.project.openSync(null, autoIndent: false)
          editor.setSelectedBufferRange([[4, 5], [4, 5]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(4)).toBe "    while(items.length > 0) {"

        it "uncomments when the line lacks the trailing whitespace in the comment regex", ->
          editor.setCursorBufferPosition([10, 0])
          editor.toggleLineCommentsInSelection()

          expect(buffer.lineForRow(10)).toBe "// "
          expect(editor.getSelectedBufferRange()).toEqual [[10, 3], [10, 3]]
          editor.backspace()
          expect(buffer.lineForRow(10)).toBe "//"

          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(10)).toBe ""
          expect(editor.getSelectedBufferRange()).toEqual [[10, 0], [10, 0]]

        it "uncomments when the line has leading whitespace", ->
          editor.setCursorBufferPosition([10, 0])
          editor.toggleLineCommentsInSelection()

          expect(buffer.lineForRow(10)).toBe "// "
          editor.moveCursorToBeginningOfLine()
          editor.insertText("  ")
          editor.setSelectedBufferRange([[10, 0], [10, 0]])
          editor.toggleLineCommentsInSelection()
          expect(buffer.lineForRow(10)).toBe "  "

      describe ".undo() and .redo()", ->
        it "undoes/redoes the last change", ->
          editor.insertText("foo")
          editor.undo()
          expect(buffer.lineForRow(0)).not.toContain "foo"

          editor.redo()
          expect(buffer.lineForRow(0)).toContain "foo"

        it "batches the undo / redo of changes caused by multiple cursors", ->
          editor.setCursorScreenPosition([0, 0])
          editor.addCursorAtScreenPosition([1, 0])

          editor.insertText("foo")
          editor.backspace()

          expect(buffer.lineForRow(0)).toContain "fovar"
          expect(buffer.lineForRow(1)).toContain "fo "

          editor.undo()

          expect(buffer.lineForRow(0)).toContain "foo"
          expect(buffer.lineForRow(1)).toContain "foo"

          editor.redo()

          expect(buffer.lineForRow(0)).not.toContain "foo"
          expect(buffer.lineForRow(0)).toContain "fovar"

        it "restores the selected ranges after undo and redo", ->
          editor.setSelectedBufferRanges([[[1, 6], [1, 10]], [[1, 22], [1, 27]]])
          editor.delete()
          editor.delete()

          selections = editor.getSelections()
          expect(buffer.lineForRow(1)).toBe '  var = function( {'

          expect(editor.getSelectedBufferRanges()).toEqual [[[1, 6], [1, 6]], [[1, 17], [1, 17]]]

          editor.undo()
          expect(editor.getSelectedBufferRanges()).toEqual [[[1, 6], [1, 6]], [[1, 18], [1, 18]]]

          editor.undo()
          expect(editor.getSelectedBufferRanges()).toEqual [[[1, 6], [1, 10]], [[1, 22], [1, 27]]]

          editor.redo()
          expect(editor.getSelectedBufferRanges()).toEqual [[[1, 6], [1, 6]], [[1, 18], [1, 18]]]

        xit "restores folds after undo and redo", ->
          editor.foldBufferRow(1)
          editor.setSelectedBufferRange([[1, 0], [10, Infinity]], preserveFolds: true)
          expect(editor.isFoldedAtBufferRow(1)).toBeTruthy()

          editor.insertText """
            \  // testing
              function foo() {
                return 1 + 2;
              }
          """
          expect(editor.isFoldedAtBufferRow(1)).toBeFalsy()
          editor.foldBufferRow(2)

          editor.undo()
          expect(editor.isFoldedAtBufferRow(1)).toBeTruthy()
          expect(editor.isFoldedAtBufferRow(9)).toBeTruthy()
          expect(editor.isFoldedAtBufferRow(10)).toBeFalsy()

          editor.redo()
          expect(editor.isFoldedAtBufferRow(1)).toBeFalsy()
          expect(editor.isFoldedAtBufferRow(2)).toBeTruthy()

      describe "begin/commitTransaction()", ->
        it "restores the selection when the transaction is undone/redone", ->
          buffer.setText('1234')
          editor.setSelectedBufferRange([[0, 1], [0, 3]])
          editor.beginTransaction()

          editor.delete()
          editor.moveCursorToEndOfLine()
          editor.insertText('5')
          expect(buffer.getText()).toBe '145'

          editor.commitTransaction()

          editor.undo()
          expect(buffer.getText()).toBe '1234'
          expect(editor.getSelectedBufferRange()).toEqual [[0, 1], [0, 3]]

          editor.redo()
          expect(buffer.getText()).toBe '145'
          expect(editor.getSelectedBufferRange()).toEqual [[0, 3], [0, 3]]

      describe "when the buffer is changed (via its direct api, rather than via than edit session)", ->
        it "moves the cursor so it is in the same relative position of the buffer", ->
          expect(editor.getCursorScreenPosition()).toEqual [0, 0]
          editor.addCursorAtScreenPosition([0, 5])
          editor.addCursorAtScreenPosition([1, 0])
          [cursor1, cursor2, cursor3] = editor.getCursors()

          buffer.insert([0, 1], 'abc')

          expect(cursor1.getScreenPosition()).toEqual [0, 0]
          expect(cursor2.getScreenPosition()).toEqual [0, 8]
          expect(cursor3.getScreenPosition()).toEqual [1, 0]

        it "does not destroy cursors or selections when a change encompasses them", ->
          cursor = editor.getCursor()
          cursor.setBufferPosition [3, 3]
          editor.buffer.delete([[3, 1], [3, 5]])
          expect(cursor.getBufferPosition()).toEqual [3, 1]
          expect(editor.getCursors().indexOf(cursor)).not.toBe -1

          selection = editor.getLastSelection()
          selection.setBufferRange [[3, 5], [3, 10]]
          editor.buffer.delete [[3, 3], [3, 8]]
          expect(selection.getBufferRange()).toEqual [[3, 3], [3, 5]]
          expect(editor.getSelections().indexOf(selection)).not.toBe -1

        it "merges cursors when the change causes them to overlap", ->
          editor.setCursorScreenPosition([0, 0])
          editor.addCursorAtScreenPosition([0, 2])
          editor.addCursorAtScreenPosition([1, 2])

          [cursor1, cursor2, cursor3] = editor.getCursors()
          expect(editor.getCursors().length).toBe 3

          buffer.delete([[0, 0], [0, 2]])

          expect(editor.getCursors().length).toBe 2
          expect(editor.getCursors()).toEqual [cursor1, cursor3]
          expect(cursor1.getBufferPosition()).toEqual [0,0]
          expect(cursor3.getBufferPosition()).toEqual [1,2]

    describe ".deleteLine()", ->
      it "deletes the first line when the cursor is there", ->
        editor.getCursor().moveToTop()
        line1 = buffer.lineForRow(1)
        count = buffer.getLineCount()
        expect(buffer.lineForRow(0)).not.toBe(line1)
        editor.deleteLine()
        expect(buffer.lineForRow(0)).toBe(line1)
        expect(buffer.getLineCount()).toBe(count - 1)

      it "deletes the last line when the cursor is there", ->
        count = buffer.getLineCount()
        secondToLastLine = buffer.lineForRow(count - 2)
        expect(buffer.lineForRow(count - 1)).not.toBe(secondToLastLine)
        editor.getCursor().moveToBottom()
        editor.deleteLine()
        newCount = buffer.getLineCount()
        expect(buffer.lineForRow(newCount - 1)).toBe(secondToLastLine)
        expect(newCount).toBe(count - 1)

      it "deletes whole lines when partial lines are selected", ->
        editor.setSelectedBufferRange([[0, 2], [1, 2]])
        line2 = buffer.lineForRow(2)
        count = buffer.getLineCount()
        expect(buffer.lineForRow(0)).not.toBe(line2)
        expect(buffer.lineForRow(1)).not.toBe(line2)
        editor.deleteLine()
        expect(buffer.lineForRow(0)).toBe(line2)
        expect(buffer.getLineCount()).toBe(count - 2)

      it "only deletes first line if only newline is selected on second line", ->
        editor.setSelectedBufferRange([[0, 2], [1, 0]])
        line1 = buffer.lineForRow(1)
        count = buffer.getLineCount()
        expect(buffer.lineForRow(0)).not.toBe(line1)
        editor.deleteLine()
        expect(buffer.lineForRow(0)).toBe(line1)
        expect(buffer.getLineCount()).toBe(count - 1)

      it "deletes the entire region when invoke on a folded region", ->
        editor.foldBufferRow(1)
        editor.getCursor().moveToTop()
        editor.getCursor().moveDown()
        expect(buffer.getLineCount()).toBe(13)
        editor.deleteLine()
        expect(buffer.getLineCount()).toBe(4)

      it "deletes the entire file from the bottom up", ->
        count = buffer.getLineCount()
        expect(count).toBeGreaterThan(0)
        for line in [0...count]
          editor.getCursor().moveToBottom()
          editor.deleteLine()
        expect(buffer.getLineCount()).toBe(1)
        expect(buffer.getText()).toBe('')

      it "deletes the entire file from the top down", ->
        count = buffer.getLineCount()
        expect(count).toBeGreaterThan(0)
        for line in [0...count]
          editor.getCursor().moveToTop()
          editor.deleteLine()
        expect(buffer.getLineCount()).toBe(1)
        expect(buffer.getText()).toBe('')

      describe "when soft wrap is enabled", ->
        it "deletes the entire line that the cursor is on", ->
          editor.setSoftWrap(true)
          editor.setEditorWidthInChars(10)
          editor.setCursorBufferPosition([6])

          line7 = buffer.lineForRow(7)
          count = buffer.getLineCount()
          expect(buffer.lineForRow(6)).not.toBe(line7)
          editor.deleteLine()
          expect(buffer.lineForRow(6)).toBe(line7)
          expect(buffer.getLineCount()).toBe(count - 1)

      describe "when the line being deleted preceeds a fold, and the command is undone", ->
        it "restores the line and preserves the fold", ->
          editor.setCursorBufferPosition([4])
          editor.foldCurrentRow()
          expect(editor.isFoldedAtScreenRow(4)).toBeTruthy()
          editor.setCursorBufferPosition([3])
          editor.deleteLine()
          expect(editor.isFoldedAtScreenRow(3)).toBeTruthy()
          expect(buffer.lineForRow(3)).toBe '    while(items.length > 0) {'
          editor.undo()
          expect(editor.isFoldedAtScreenRow(4)).toBeTruthy()
          expect(buffer.lineForRow(3)).toBe '    var pivot = items.shift(), current, left = [], right = [];'

    describe ".replaceSelectedText(options, fn)", ->
      describe "when no text is selected", ->
        it "inserts the text returned from the function at the cursor position", ->
          editor.replaceSelectedText {}, -> '123'
          expect(buffer.lineForRow(0)).toBe '123var quicksort = function () {'

          editor.replaceSelectedText {selectWordIfEmpty: true}, -> 'var'
          editor.setCursorBufferPosition([0])
          expect(buffer.lineForRow(0)).toBe 'var quicksort = function () {'

          editor.setCursorBufferPosition([10])
          editor.replaceSelectedText null, -> ''
          expect(buffer.lineForRow(10)).toBe ''

      describe "when text is selected", ->
        it "replaces the selected text with the text returned from the function", ->
          editor.setSelectedBufferRange([[0, 1], [0, 3]])
          editor.replaceSelectedText {}, -> 'ia'
          expect(buffer.lineForRow(0)).toBe 'via quicksort = function () {'

    describe ".transpose()", ->
      it "swaps two characters", ->
        editor.buffer.setText("abc")
        editor.setCursorScreenPosition([0, 1])
        editor.transpose()
        expect(editor.lineForBufferRow(0)).toBe 'bac'

      it "reverses a selection", ->
        editor.buffer.setText("xabcz")
        editor.setSelectedBufferRange([[0, 1], [0, 4]])
        editor.transpose()
        expect(editor.lineForBufferRow(0)).toBe 'xcbaz'

    describe ".upperCase()", ->
      describe "when there is no selection", ->
        it "upper cases the current word", ->
          editor.buffer.setText("aBc")
          editor.setCursorScreenPosition([0, 1])
          editor.upperCase()
          expect(editor.lineForBufferRow(0)).toBe 'ABC'
          expect(editor.getSelectedBufferRange()).toEqual [[0, 1], [0, 1]]

      describe "when there is a selection", ->
        it "upper cases the current selection", ->
          editor.buffer.setText("abc")
          editor.setSelectedBufferRange([[0,0], [0,2]])
          editor.upperCase()
          expect(editor.lineForBufferRow(0)).toBe 'ABc'
          expect(editor.getSelectedBufferRange()).toEqual [[0, 0], [0, 2]]

    describe ".lowerCase()", ->
      describe "when there is no selection", ->
        it "lower cases the current word", ->
          editor.buffer.setText("aBC")
          editor.setCursorScreenPosition([0, 1])
          editor.lowerCase()
          expect(editor.lineForBufferRow(0)).toBe 'abc'
          expect(editor.getSelectedBufferRange()).toEqual [[0, 1], [0, 1]]

      describe "when there is a selection", ->
        it "lower cases the current selection", ->
          editor.buffer.setText("ABC")
          editor.setSelectedBufferRange([[0,0], [0,2]])
          editor.lowerCase()
          expect(editor.lineForBufferRow(0)).toBe 'abC'
          expect(editor.getSelectedBufferRange()).toEqual [[0, 0], [0, 2]]

    describe "soft-tabs detection", ->
      it "assigns soft / hard tabs based on the contents of the buffer, or uses the default if unknown", ->
        editor = atom.project.openSync('sample.js', softTabs: false)
        expect(editor.getSoftTabs()).toBeTruthy()

        editor = atom.project.openSync('sample-with-tabs.coffee', softTabs: true)
        expect(editor.getSoftTabs()).toBeFalsy()

        editor = atom.project.openSync(null, softTabs: false)
        expect(editor.getSoftTabs()).toBeFalsy()

    describe ".indentLevelForLine(line)", ->
      it "returns the indent level when the line has only leading whitespace", ->
        expect(editor.indentLevelForLine("    hello")).toBe(2)
        expect(editor.indentLevelForLine("   hello")).toBe(1.5)

      it "returns the indent level when the line has only leading tabs", ->
        expect(editor.indentLevelForLine("\t\thello")).toBe(2)

      it "returns the indent level when the line has mixed leading whitespace and tabs", ->
        expect(editor.indentLevelForLine("\t  hello")).toBe(2)
        expect(editor.indentLevelForLine("  \thello")).toBe(2)
        expect(editor.indentLevelForLine("  \t hello")).toBe(2.5)
        expect(editor.indentLevelForLine("  \t \thello")).toBe(3.5)

    describe "when the buffer is reloaded", ->
      it "preserves the current cursor position", ->
        editor.setCursorScreenPosition([0, 1])
        editor.buffer.reload()
        expect(editor.getCursorScreenPosition()).toEqual [0,1]

    describe "when a better-matched grammar is added to syntax", ->
      it "switches to the better-matched grammar and re-tokenizes the buffer", ->
        editor.destroy()
        jsGrammar = atom.syntax.selectGrammar('a.js')
        atom.syntax.removeGrammar(jsGrammar)

        editor = atom.project.openSync('sample.js', autoIndent: false)
        expect(editor.getGrammar()).toBe atom.syntax.nullGrammar
        expect(editor.lineForScreenRow(0).tokens.length).toBe 1

        atom.syntax.addGrammar(jsGrammar)
        expect(editor.getGrammar()).toBe jsGrammar
        expect(editor.lineForScreenRow(0).tokens.length).toBeGreaterThan 1

    describe "auto-indent", ->
      copyText = (text, {startColumn}={}) ->
        startColumn ?= 0
        editor.setCursorBufferPosition([0, 0])
        editor.insertText(text)
        numberOfNewlines = text.match(/\n/g)?.length
        endColumn = text.match(/[^\n]*$/)[0]?.length
        editor.getSelection().setBufferRange([[0,startColumn], [numberOfNewlines,endColumn]])
        editor.cutSelectedText()

      describe "editor.autoIndent", ->
        describe "when editor.autoIndent is false (default)", ->
          describe "when `indent` is triggered", ->
            it "does not auto-indent the line", ->
              editor.setCursorBufferPosition([1, 30])
              editor.insertText("\n ")
              expect(editor.lineForBufferRow(2)).toBe " "

              atom.config.set("editor.autoIndent", false)
              editor.indent()
              expect(editor.lineForBufferRow(2)).toBe "   "

        describe "when editor.autoIndent is true", ->
          beforeEach ->
            atom.config.set("editor.autoIndent", true)

          describe "when `indent` is triggered", ->
            it "auto-indents the line", ->
              editor.setCursorBufferPosition([1, 30])
              editor.insertText("\n ")
              expect(editor.lineForBufferRow(2)).toBe " "

              atom.config.set("editor.autoIndent", true)
              editor.indent()
              expect(editor.lineForBufferRow(2)).toBe "    "

          describe "when a newline is added", ->
            describe "when the line preceding the newline adds a new level of indentation", ->
              it "indents the newline to one additional level of indentation beyond the preceding line", ->
                editor.setCursorBufferPosition([1, Infinity])
                editor.insertText('\n')
                expect(editor.indentationForBufferRow(2)).toBe editor.indentationForBufferRow(1) + 1

            describe "when the line preceding the newline does't add a level of indentation", ->
              it "indents the new line to the same level a as the preceding line", ->
                editor.setCursorBufferPosition([5, 13])
                editor.insertText('\n')
                expect(editor.indentationForBufferRow(6)).toBe editor.indentationForBufferRow(5)

            describe "when the line preceding the newline is a comment", ->
              it "maintains the indent of the commented line", ->
                editor.setCursorBufferPosition([0, 0])
                editor.insertText('    //')
                editor.setCursorBufferPosition([0, Infinity])
                editor.insertText('\n')
                expect(editor.indentationForBufferRow(1)).toBe 2

            it "does not indent the line preceding the newline", ->
              editor.setCursorBufferPosition([2, 0])
              editor.insertText('  var this-line-should-be-indented-more\n')
              expect(editor.indentationForBufferRow(1)).toBe 1

              atom.config.set("editor.autoIndent", true)
              editor.setCursorBufferPosition([2, Infinity])
              editor.insertText('\n')
              expect(editor.indentationForBufferRow(1)).toBe 1
              expect(editor.indentationForBufferRow(2)).toBe 1

          describe "when inserted text matches a decrease indent pattern", ->
            describe "when the preceding line matches an increase indent pattern", ->
              it "decreases the indentation to match that of the preceding line", ->
                editor.setCursorBufferPosition([1, Infinity])
                editor.insertText('\n')
                expect(editor.indentationForBufferRow(2)).toBe editor.indentationForBufferRow(1) + 1
                editor.insertText('}')
                expect(editor.indentationForBufferRow(2)).toBe editor.indentationForBufferRow(1)

            describe "when the preceding line doesn't match an increase indent pattern", ->
              it "decreases the indentation to be one level below that of the preceding line", ->
                editor.setCursorBufferPosition([3, Infinity])
                editor.insertText('\n    ')
                expect(editor.indentationForBufferRow(4)).toBe editor.indentationForBufferRow(3)
                editor.insertText('}')
                expect(editor.indentationForBufferRow(4)).toBe editor.indentationForBufferRow(3) - 1

              it "doesn't break when decreasing the indentation on a row that has no indentation", ->
                editor.setCursorBufferPosition([12, Infinity])
                editor.insertText("\n}; # too many closing brackets!")
                expect(editor.lineForBufferRow(13)).toBe "}; # too many closing brackets!"

          describe "when inserted text does not match a decrease indent pattern", ->
            it "does not the indentation", ->
              editor.setCursorBufferPosition([12, 0])
              editor.insertText('  ')
              expect(editor.lineForBufferRow(12)).toBe '  };'
              editor.insertText('\t\t')
              expect(editor.lineForBufferRow(12)).toBe '  \t\t};'

          describe "when the current line does not match a decrease indent pattern", ->
            it "leaves the line unchanged", ->
              editor.setCursorBufferPosition([2, 4])
              expect(editor.indentationForBufferRow(2)).toBe editor.indentationForBufferRow(1) + 1
              editor.insertText('foo')
              expect(editor.indentationForBufferRow(2)).toBe editor.indentationForBufferRow(1) + 1

      describe "editor.normalizeIndentOnPaste", ->
        beforeEach ->
          atom.config.set('editor.normalizeIndentOnPaste', true)

        it "does not normalize the indentation level of the text when editor.normalizeIndentOnPaste is false", ->
          copyText("   function() {\nvar cool = 1;\n  }\n")
          atom.config.set('editor.normalizeIndentOnPaste', false)
          editor.setCursorBufferPosition([5, 2])
          editor.pasteText()
          expect(editor.lineForBufferRow(5)).toBe "     function() {"
          expect(editor.lineForBufferRow(6)).toBe "var cool = 1;"
          expect(editor.lineForBufferRow(7)).toBe "  }"

        describe "when the inserted text contains no newlines", ->
          it "does not adjust the indentation level of the text", ->
            editor.setCursorBufferPosition([5, 2])
            editor.insertText("foo", indentBasis: 5)
            expect(editor.lineForBufferRow(5)).toBe "  foo    current = items.shift();"

          it "does not adjust the whitespace if there are preceding characters", ->
            copyText(" foo")
            editor.setCursorBufferPosition([5, 30])
            editor.pasteText()

            expect(editor.lineForBufferRow(5)).toBe "      current = items.shift(); foo"

        describe "when the inserted text contains newlines", ->
          describe "when the cursor is preceded only by whitespace characters", ->
            it "normalizes indented lines to the cursor's current indentation level", ->
              copyText("    while (true) {\n      foo();\n    }\n", {startColumn: 2})
              editor.setCursorBufferPosition([3, 4])
              editor.pasteText()

              expect(editor.lineForBufferRow(3)).toBe "    while (true) {"
              expect(editor.lineForBufferRow(4)).toBe "      foo();"
              expect(editor.lineForBufferRow(5)).toBe "    }"
              expect(editor.lineForBufferRow(6)).toBe "var pivot = items.shift(), current, left = [], right = [];"

          describe "when the cursor is preceded by non-whitespace characters", ->
            it "normalizes the indentation level of all lines based on the level of the existing first line", ->
              copyText("    while (true) {\n      foo();\n    }\n", {startColumn: 0})
              editor.setCursorBufferPosition([1, Infinity])
              editor.pasteText()

              expect(editor.lineForBufferRow(1)).toBe "  var sort = function(items) {while (true) {"
              expect(editor.lineForBufferRow(2)).toBe "    foo();"
              expect(editor.lineForBufferRow(3)).toBe "  }"
              expect(editor.lineForBufferRow(4)).toBe ""

      it "autoIndentSelectedRows auto-indents the selection", ->
        editor.setCursorBufferPosition([2, 0])
        editor.insertText("function() {\ninside=true\n}\n  i=1\n")
        editor.getSelection().setBufferRange([[2,0], [6,0]])
        editor.autoIndentSelectedRows()

        expect(editor.lineForBufferRow(2)).toBe "    function() {"
        expect(editor.lineForBufferRow(3)).toBe "      inside=true"
        expect(editor.lineForBufferRow(4)).toBe "    }"
        expect(editor.lineForBufferRow(5)).toBe "    i=1"

    describe ".destroy()", ->
      it "destroys all markers associated with the edit session", ->
        expect(buffer.getMarkerCount()).toBeGreaterThan 0
        editor.destroy()
        expect(buffer.getMarkerCount()).toBe 0

    describe ".joinLine()", ->
      describe "when no text is selected", ->
        describe "when the line below isn't empty", ->
          it "joins the line below with the current line separated by a space and moves the cursor to the start of line that was moved up", ->
            editor.joinLine()
            expect(editor.lineForBufferRow(0)).toBe 'var quicksort = function () { var sort = function(items) {'
            expect(editor.getCursorBufferPosition()).toEqual [0, 30]

        describe "when the line below is empty", ->
          it "deletes the line below and moves the cursor to the end of the line", ->
            editor.setCursorBufferPosition([9])
            editor.joinLine()
            expect(editor.lineForBufferRow(9)).toBe '  };'
            expect(editor.lineForBufferRow(10)).toBe '  return sort(Array.apply(this, arguments));'
            expect(editor.getCursorBufferPosition()).toEqual [9, 4]

        describe "when the cursor is on the last row", ->
          it "does nothing", ->
            editor.setCursorBufferPosition([Infinity, Infinity])
            editor.joinLine()
            expect(editor.lineForBufferRow(12)).toBe '};'

      describe "when text is selected", ->
        describe "when the selection does not span multiple lines", ->
          it "joins the line below with the current line separated by a space and retains the selected text", ->
            editor.setSelectedBufferRange([[0, 1], [0, 3]])
            editor.joinLine()
            expect(editor.lineForBufferRow(0)).toBe 'var quicksort = function () { var sort = function(items) {'
            expect(editor.getSelectedBufferRange()).toEqual [[0, 1], [0, 3]]

        describe "when the selection spans multiple lines", ->
          it "joins all selected lines separated by a space and retains the selected text", ->
            editor.setSelectedBufferRange([[9, 3], [12, 1]])
            editor.joinLine()
            expect(editor.lineForBufferRow(9)).toBe '  }; return sort(Array.apply(this, arguments)); };'
            expect(editor.getSelectedBufferRange()).toEqual [[9, 3], [9, 49]]

    describe ".shouldPromptToSave()", ->
      it "returns false when an edit session's buffer is in use by more than one session", ->
        expect(editor.shouldPromptToSave()).toBeFalsy()
        buffer.setText('changed')
        expect(editor.shouldPromptToSave()).toBeTruthy()
        editor2 = atom.project.openSync('sample.js', autoIndent: false)
        expect(editor.shouldPromptToSave()).toBeFalsy()
        editor2.destroy()
        expect(editor.shouldPromptToSave()).toBeTruthy()

    describe "when the edit session contains surrogate pair characters", ->
      it "correctly backspaces over them", ->
        editor.setText('\uD835\uDF97\uD835\uDF97\uD835\uDF97')
        editor.moveCursorToBottom()
        editor.backspace()
        expect(editor.getText()).toBe '\uD835\uDF97\uD835\uDF97'
        editor.backspace()
        expect(editor.getText()).toBe '\uD835\uDF97'
        editor.backspace()
        expect(editor.getText()).toBe ''

      it "correctly deletes over them", ->
        editor.setText('\uD835\uDF97\uD835\uDF97\uD835\uDF97')
        editor.moveCursorToTop()
        editor.delete()
        expect(editor.getText()).toBe '\uD835\uDF97\uD835\uDF97'
        editor.delete()
        expect(editor.getText()).toBe '\uD835\uDF97'
        editor.delete()
        expect(editor.getText()).toBe ''

      it "correctly moves over them", ->
        editor.setText('\uD835\uDF97\uD835\uDF97\uD835\uDF97\n')
        editor.moveCursorToTop()
        editor.moveCursorRight()
        expect(editor.getCursorBufferPosition()).toEqual [0, 2]
        editor.moveCursorRight()
        expect(editor.getCursorBufferPosition()).toEqual [0, 4]
        editor.moveCursorRight()
        expect(editor.getCursorBufferPosition()).toEqual [0, 6]
        editor.moveCursorRight()
        expect(editor.getCursorBufferPosition()).toEqual [1, 0]
        editor.moveCursorLeft()
        expect(editor.getCursorBufferPosition()).toEqual [0, 6]
        editor.moveCursorLeft()
        expect(editor.getCursorBufferPosition()).toEqual [0, 4]
        editor.moveCursorLeft()
        expect(editor.getCursorBufferPosition()).toEqual [0, 2]
        editor.moveCursorLeft()
        expect(editor.getCursorBufferPosition()).toEqual [0, 0]