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113 lines
3.6 KiB
CoffeeScript
113 lines
3.6 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 = new UndoManager(buffer)
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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 "startUndoBatch() / endUndoBatch()", ->
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it "causes changes in batch to be undone simultaneously and returns an array of ranges to select from undo and redo", ->
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buffer.insert([0, 0], "foo")
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ignoredRanges = [[[666, 666], [666, 666]], [[666, 666], [666, 666]]]
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beforeRanges = [[[1, 2], [1, 2]], [[1, 9], [1, 9]]]
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afterRanges =[[[1, 5], [1, 5]], [[1, 12], [1, 12]]]
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undoManager.startUndoBatch(beforeRanges)
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undoManager.startUndoBatch(ignoredRanges) # calls can be nested
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buffer.insert([1, 2], "111")
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buffer.insert([1, 9], "222")
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undoManager.endUndoBatch(ignoredRanges) # calls can be nested
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undoManager.endUndoBatch(afterRanges)
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expect(buffer.lineForRow(1)).toBe ' 111var 222sort = function(items) {'
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ranges = undoManager.undo()
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expect(ranges).toBe beforeRanges
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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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ranges = undoManager.undo()
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expect(ranges).toBeUndefined()
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expect(buffer.lineForRow(0)).not.toContain 'foo'
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ranges = undoManager.redo()
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expect(ranges).toBeUndefined()
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expect(buffer.lineForRow(0)).toContain 'foo'
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ranges = undoManager.redo()
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expect(ranges).toBe afterRanges
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expect(buffer.lineForRow(1)).toBe ' 111var 222sort = function(items) {'
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ranges = undoManager.undo()
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expect(ranges).toBe beforeRanges
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expect(buffer.lineForRow(1)).toBe ' var sort = function(items) {'
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it "does not store empty batches", ->
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buffer.insert([0,0], "foo")
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undoManager.startUndoBatch()
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undoManager.endUndoBatch()
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undoManager.undo()
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expect(buffer.lineForRow(0)).not.toContain("foo")
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