39 lines
976 B
TypeScript
39 lines
976 B
TypeScript
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import { expect, test } from 'bun:test'
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import { UndoManager } from '@open-pencil/scene-graph'
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test('discarding nested batches preserves committed undo/redo without replay or notifications', () => {
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let changes = 0
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let replayed = 0
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const undo = new UndoManager({
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onChange: () => {
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changes++
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}
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})
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const noop = () => undefined
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undo.push({ label: 'First', forward: noop, inverse: noop })
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undo.push({ label: 'Second', forward: noop, inverse: noop })
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undo.undo()
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const pending = {
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label: 'Pending',
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forward: () => {
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replayed++
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},
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inverse: () => {
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replayed++
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}
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}
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undo.beginBatch('Outer')
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undo.push(pending)
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undo.beginBatch('Inner')
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undo.push(pending)
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undo.discardBatches()
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expect(undo.isBatching).toBe(false)
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expect(replayed).toBe(0)
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expect(changes).toBe(3)
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expect(undo.undoLabel).toBe('First')
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expect(undo.redoLabel).toBe('Second')
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undo.commitBatch()
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expect(undo.redo()).toBe('Second')
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})
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