mirror of
https://github.com/angular/angular
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45 lines
1.3 KiB
TypeScript
45 lines
1.3 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.dev/license
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*/
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/**
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* Wraps a test function in an asynchronous test zone. The test will automatically
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* complete when all asynchronous calls within this zone are done. Can be used
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* to wrap an {@link inject} call.
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*
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* Example:
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*
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* ```ts
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* it('...', waitForAsync(inject([AClass], (object) => {
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* object.doSomething.then(() => {
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* expect(...);
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* })
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* })));
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* ```
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*
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* @publicApi
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*/
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export function waitForAsync(fn: Function): (done: any) => any {
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const _Zone: any = typeof Zone !== 'undefined' ? Zone : null;
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if (!_Zone) {
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return function () {
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return Promise.reject(
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'Zone is needed for the waitForAsync() test helper but could not be found. ' +
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'Please make sure that your environment includes zone.js',
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);
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};
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}
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const asyncTest = _Zone && _Zone[_Zone.__symbol__('asyncTest')];
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if (typeof asyncTest === 'function') {
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return asyncTest(fn);
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}
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return function () {
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return Promise.reject(
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'zone-testing.js is needed for the async() test helper but could not be found. ' +
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'Please make sure that your environment includes zone.js/testing',
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);
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};
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}
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