29 lines
1 KiB
TypeScript
29 lines
1 KiB
TypeScript
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
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import { armSseKeepAlive } from '../../src/server/sseKeepAlive.js';
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describe('armSseKeepAlive', () => {
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beforeEach(() => vi.useFakeTimers());
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afterEach(() => vi.useRealTimers());
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it.each([0, -1, 0.5, Number.NaN, Number.POSITIVE_INFINITY])('disables invalid delay %s', delay => {
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expect(armSseKeepAlive(delay, () => {})).toBeUndefined();
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expect(vi.getTimerCount()).toBe(0);
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});
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it('ticks at the configured interval', async () => {
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const tick = vi.fn();
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const timer = armSseKeepAlive(1_000, tick)!;
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await vi.advanceTimersByTimeAsync(3_000);
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expect(tick).toHaveBeenCalledTimes(3);
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clearInterval(timer);
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});
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it('clamps overflowing delays instead of creating a 1ms timer', async () => {
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const tick = vi.fn();
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const timer = armSseKeepAlive(2 ** 31, tick)!;
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await vi.advanceTimersByTimeAsync(60_000);
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expect(tick).not.toHaveBeenCalled();
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clearInterval(timer);
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});
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});
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