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101 lines
2.9 KiB
CoffeeScript
101 lines
2.9 KiB
CoffeeScript
UndoManager = require 'undo-manager'
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Buffer = require 'buffer'
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Range = require 'range'
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describe "UndoManager", ->
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[buffer, undoManager] = []
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beforeEach ->
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buffer = new Buffer(require.resolve('fixtures/sample.js'))
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undoManager = buffer.undoManager
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afterEach ->
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buffer.destroy()
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describe ".undo()", ->
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it "undoes the last change", ->
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buffer.change(new Range([0, 5], [0, 9]), '')
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buffer.insert([0, 6], 'h')
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buffer.insert([0, 10], 'y')
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expect(buffer.lineForRow(0)).toContain 'qshorty'
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undoManager.undo()
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expect(buffer.lineForRow(0)).toContain 'qshort'
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expect(buffer.lineForRow(0)).not.toContain 'qshorty'
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undoManager.undo()
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expect(buffer.lineForRow(0)).toContain 'qsort'
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undoManager.undo()
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expect(buffer.lineForRow(0)).toContain 'quicksort'
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it "does not throw an exception when there is nothing to undo", ->
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undoManager.undo()
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describe ".redo()", ->
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beforeEach ->
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buffer.change(new Range([0, 5], [0, 9]), '')
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buffer.insert([0, 6], 'h')
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buffer.insert([0, 10], 'y')
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undoManager.undo()
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undoManager.undo()
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expect(buffer.lineForRow(0)).toContain 'qsort'
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it "redoes the last undone change", ->
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undoManager.redo()
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expect(buffer.lineForRow(0)).toContain 'qshort'
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undoManager.redo()
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expect(buffer.lineForRow(0)).toContain 'qshorty'
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undoManager.undo()
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expect(buffer.lineForRow(0)).toContain 'qshort'
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it "does not throw an exception when there is nothing to redo", ->
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undoManager.redo()
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undoManager.redo()
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undoManager.redo()
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it "discards the redo history when there is a new change following an undo", ->
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buffer.insert([0, 6], 'p')
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expect(buffer.getText()).toContain 'qsport'
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undoManager.redo()
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expect(buffer.getText()).toContain 'qsport'
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describe "transact(fn)", ->
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it "causes changes in the transaction to be undone simultaneously", ->
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buffer.insert([0, 0], "foo")
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undoManager.transact ->
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undoManager.transact ->
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buffer.insert([1, 2], "111")
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buffer.insert([1, 9], "222")
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expect(buffer.lineForRow(1)).toBe ' 111var 222sort = function(items) {'
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undoManager.undo()
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expect(buffer.lineForRow(1)).toBe ' var sort = function(items) {'
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expect(buffer.lineForRow(0)).toContain 'foo'
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undoManager.undo()
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expect(buffer.lineForRow(0)).not.toContain 'foo'
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undoManager.redo()
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expect(buffer.lineForRow(0)).toContain 'foo'
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undoManager.redo()
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expect(buffer.lineForRow(1)).toBe ' 111var 222sort = function(items) {'
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undoManager.undo()
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expect(buffer.lineForRow(1)).toBe ' var sort = function(items) {'
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it "does not record empty transactions", ->
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buffer.insert([0,0], "foo")
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undoManager.transact ->
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undoManager.undo()
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expect(buffer.lineForRow(0)).not.toContain("foo")
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