Xiaohan-Tian
43 lines
1.4 KiB
TypeScript
43 lines
1.4 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { KGTrackAutomationPoint } from '../core/track/KGTrackAutomationPoint';
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import {
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bakeTrackAutomationPointsInWindow,
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normalizeTrackAutomationPoints,
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resolveTrackAutomationValueAtBeat,
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} from './trackAutomationUtil';
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describe('trackAutomationUtil', () => {
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it('dedupes same-beat points and keeps the latest value', () => {
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const normalized = normalizeTrackAutomationPoints([
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{ beat: 1, value: -6 },
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{ beat: 1, value: -3 },
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{ beat: 2, value: 1 },
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], 'volume');
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expect(normalized).toEqual([
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{ beat: 1, value: -3 },
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{ beat: 2, value: 1 },
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]);
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});
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it('interpolates between points and falls back to the default before the first point', () => {
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const points = [
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new KGTrackAutomationPoint('point-1', 1, -6),
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new KGTrackAutomationPoint('point-2', 3, 6),
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];
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expect(resolveTrackAutomationValueAtBeat(points, 'volume', 0.5, 0)).toBe(0);
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expect(resolveTrackAutomationValueAtBeat(points, 'volume', 2, 0)).toBe(0);
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});
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it('bakes intermediate points for changing automation spans', () => {
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const baked = bakeTrackAutomationPointsInWindow([
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{ beat: 0, value: 0 },
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{ beat: 2, value: 1 },
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], 'pan', 0, 2, 250, 120);
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expect(baked[0]).toEqual({ beat: 0, value: 0 });
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expect(baked.some(point => point.beat > 0 && point.beat < 2)).toBe(true);
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});
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});
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