addons/shared/__tests__/rejectAfterTimeout.test.tsblame
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b69ab311/**
b69ab312 * Copyright (c) Meta Platforms, Inc. and affiliates.
b69ab313 *
b69ab314 * This source code is licensed under the MIT license found in the
b69ab315 * LICENSE file in the root directory of this source tree.
b69ab316 */
b69ab317
b69ab318import rejectAfterTimeout from '../rejectAfterTimeout';
b69ab319
b69ab3110describe('rejectAfterTimeout', () => {
b69ab3111 beforeEach(() => {
b69ab3112 jest.useFakeTimers();
b69ab3113 });
b69ab3114
b69ab3115 test('instant promise should win', async () => {
b69ab3116 const instantPromise = Promise.resolve('winner');
b69ab3117 const result = await rejectAfterTimeout(instantPromise, 5_000, 'too slow?');
b69ab3118 expect(result).toBe('winner');
b69ab3119 jest.advanceTimersByTime(5_000);
b69ab3120 });
b69ab3121
b69ab3122 test('fast promise should win', async () => {
b69ab3123 const fastPromise = new Promise(resolve => setTimeout(() => resolve('winner'), 1_000));
b69ab3124 const promise = rejectAfterTimeout(fastPromise, 5_000, 'too slow?');
b69ab3125 jest.advanceTimersByTime(1_000);
b69ab3126 const result = await promise;
b69ab3127 expect(result).toBe('winner');
b69ab3128 jest.advanceTimersByTime(4_000);
b69ab3129 });
b69ab3130
b69ab3131 test('slow promise should lose', () => {
b69ab3132 const slowPromise = new Promise(resolve => setTimeout(() => resolve('winner'), 5_000));
b69ab3133 const promise = rejectAfterTimeout(slowPromise, 1_000, 'too slow?');
b69ab3134 jest.advanceTimersByTime(1_000);
b69ab3135 expect(promise).rejects.toBe('too slow?');
b69ab3136 jest.advanceTimersByTime(4_000);
b69ab3137 });
b69ab3138});