54 lines
1.5 KiB
TypeScript
54 lines
1.5 KiB
TypeScript
import assert from 'node:assert/strict'
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import { describe, it } from 'node:test'
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import { applyTimecode, nudgeKeyframe } from './keyframe-controls.ts'
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const keyframes = [
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{ id: 'opening', frameIndex: 10 },
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{ id: 'middle', frameIndex: 11 },
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{ id: 'closing', frameIndex: 20 },
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]
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describe('nudgeKeyframe', () => {
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it('moves a keyframe one frame in the requested direction', () => {
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assert.equal(nudgeKeyframe(keyframes, 'closing', -1, 30), 19)
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})
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it('never lands on another keyframe', () => {
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const frameIndex = nudgeKeyframe(keyframes, 'opening', 1, 30)
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assert.equal(frameIndex, 12)
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assert.equal(
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keyframes.some((keyframe) => (
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keyframe.id !== 'opening' && keyframe.frameIndex === frameIndex
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)),
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false,
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)
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})
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it('returns null for an unknown keyframe', () => {
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assert.equal(nudgeKeyframe(keyframes, 'missing', 1, 30), null)
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})
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})
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describe('applyTimecode', () => {
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it('converts a valid timecode to a frame index', () => {
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assert.equal(applyTimecode(keyframes, 'opening', '00:00.13', 25, 30), 13)
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})
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it('moves a colliding timecode to the nearest free frame', () => {
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const frameIndex = applyTimecode(keyframes, 'opening', '00:00.11', 25, 30)
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assert.equal(frameIndex, 12)
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assert.equal(
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keyframes.some((keyframe) => (
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keyframe.id !== 'opening' && keyframe.frameIndex === frameIndex
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)),
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false,
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)
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})
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it('returns null for invalid timecode', () => {
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assert.equal(applyTimecode(keyframes, 'opening', 'invalid', 25, 30), null)
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})
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})
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