Xiaohan-Tian
62 lines
1.9 KiB
TypeScript
62 lines
1.9 KiB
TypeScript
import { beforeEach, describe, expect, it, vi } from 'vitest';
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import { MockLoop, MockTransport } from '../../test/mocks/tone';
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vi.mock('tone', async () => {
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const { ToneMock: toneMock } = await import('../../test/mocks/tone');
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return toneMock;
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});
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import { KGMetronome } from './KGMetronome';
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describe('KGMetronome', () => {
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beforeEach(() => {
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vi.useFakeTimers();
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vi.setSystemTime(0);
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vi.clearAllMocks();
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MockTransport.bpm.value = 120;
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MockTransport.getTicksAtTime.mockImplementation((time: number) => time * MockTransport.PPQ);
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});
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it('schedules audible preroll clicks before beat 0 and keeps the beat 0 accent', () => {
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const metronome = new KGMetronome();
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const triggerAttackRelease = vi.fn()
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;(metronome as unknown as { sampler: unknown }).sampler = {
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loaded: true,
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triggerAttackRelease,
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};
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metronome.start(-4, 4, 0.2);
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vi.advanceTimersByTime(200);
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expect(triggerAttackRelease.mock.calls[0]?.[0]).toBe('C5');
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expect(triggerAttackRelease.mock.calls[0]?.[1]).toBe('16n');
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expect(triggerAttackRelease.mock.calls[0]?.[2]).toBeCloseTo(0.2, 5);
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vi.advanceTimersByTime(1000);
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expect(triggerAttackRelease.mock.calls[1]?.[0]).toBe('C4');
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expect(triggerAttackRelease.mock.calls[1]?.[1]).toBe('16n');
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expect(triggerAttackRelease.mock.calls[1]?.[2]).toBeCloseTo(0.7, 5);
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const transportLoop = MockLoop.mock.results[0]?.value;
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expect(transportLoop).toBeDefined();
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transportLoop.callback(0);
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expect(triggerAttackRelease).toHaveBeenLastCalledWith('C5', '16n', 0.2);
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});
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it('cancels pending preroll clicks when stopped', () => {
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const metronome = new KGMetronome();
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const triggerAttackRelease = vi.fn()
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;(metronome as unknown as { sampler: unknown }).sampler = {
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loaded: true,
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triggerAttackRelease,
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};
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metronome.start(-2, 4, 0.2);
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metronome.stop();
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vi.runAllTimers();
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expect(triggerAttackRelease).not.toHaveBeenCalled();
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});
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});
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