59 lines
1.7 KiB
TypeScript
59 lines
1.7 KiB
TypeScript
// Copyright 2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import * as sinon from 'sinon';
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import { startTimeTravelDetector } from '../../util/startTimeTravelDetector';
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describe('startTimeTravelDetector', () => {
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let sandbox: sinon.SinonSandbox;
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beforeEach(() => {
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sandbox = sinon.createSandbox({ useFakeTimers: true });
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});
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afterEach(() => {
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sandbox.restore();
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});
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it('calls the callback when the time between checks is more than 2 seconds', async () => {
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const callback = sandbox.fake();
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startTimeTravelDetector(callback);
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// Normal clock behavior
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await sandbox.clock.tickAsync(1234);
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await sandbox.clock.tickAsync(5678);
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sinon.assert.notCalled(callback);
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// Time travel ≤2s
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sandbox.clock.setSystemTime(Date.now() + 1000);
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await sandbox.clock.tickAsync(1000);
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sinon.assert.notCalled(callback);
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sandbox.clock.setSystemTime(Date.now() + 1999);
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await sandbox.clock.tickAsync(1);
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sinon.assert.notCalled(callback);
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// Time travel >2s
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sandbox.clock.setSystemTime(Date.now() + 2001);
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await sandbox.clock.nextAsync();
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sinon.assert.calledOnce(callback);
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sandbox.clock.setSystemTime(Date.now() + 9999);
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await sandbox.clock.nextAsync();
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sinon.assert.calledTwice(callback);
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// Normal clock behavior
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await sandbox.clock.tickAsync(9876);
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sinon.assert.calledTwice(callback);
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});
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it('can detect time travel right after initialization', async () => {
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const callback = sandbox.fake();
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startTimeTravelDetector(callback);
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sandbox.clock.setSystemTime(Date.now() + 2001);
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await sandbox.clock.nextAsync();
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sinon.assert.calledOnce(callback);
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});
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});
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