directus

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import { afterAll, beforeAll, expect, test, vi, type MockInstance } from 'vitest';
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import { stall } from './stall.js';
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let performanceNowSpy: MockInstance;
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beforeAll(() => {
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	vi.useFakeTimers();
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	// fake timers doesn't fake performance.now(), so this is used to mock it
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	performanceNowSpy = vi.spyOn(performance, 'now').mockReturnValue(0);
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});
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afterAll(() => {
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	vi.useRealTimers();
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});
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const STALL_TIME = 100;
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test('does not stall if elapsed time has already past the stall time', () => {
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	const startTime = performance.now();
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	// intentionally advance past the stall time first
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	performanceNowSpy.mockReturnValueOnce(1000);
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	stall(STALL_TIME, startTime);
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	expect(vi.getTimerCount()).toBe(0);
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});
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test('should stall for a set amount of time', () => {
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	const startTime = performance.now();
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	stall(STALL_TIME, startTime);
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	expect(vi.getTimerCount()).toBe(1);
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	vi.advanceTimersByTime(STALL_TIME);
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	expect(vi.getTimerCount()).toBe(0);
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});
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