d1ea1f4c7f
Update the license headers throughout the repository to reference Google LLC rather than Google Inc, for the required license headers. PR Close #37205
48 lines
1.7 KiB
TypeScript
48 lines
1.7 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.io/license
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*/
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import {isObservable, isPromise} from '@angular/core/src/util/lang';
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import {of} from 'rxjs';
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{
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describe('isPromise', () => {
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it('should be true for native Promises',
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() => expect(isPromise(Promise.resolve(true))).toEqual(true));
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it('should be true for thenables', () => expect(isPromise({then: () => {}})).toEqual(true));
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it('should be false if "then" is not a function',
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() => expect(isPromise({then: 0})).toEqual(false));
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it('should be false if the argument has no "then" function',
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() => expect(isPromise({})).toEqual(false));
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it('should be false if the argument is undefined or null', () => {
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expect(isPromise(undefined)).toEqual(false);
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expect(isPromise(null)).toEqual(false);
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});
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});
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describe('isObservable', () => {
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it('should be true for an Observable', () => expect(isObservable(of(true))).toEqual(true));
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it('should be true if the argument is the object with subscribe function',
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() => expect(isObservable({subscribe: () => {}})).toEqual(true));
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it('should be false if the argument is undefined',
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() => expect(isObservable(undefined)).toEqual(false));
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it('should be false if the argument is null', () => expect(isObservable(null)).toEqual(false));
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it('should be false if the argument is an object',
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() => expect(isObservable({})).toEqual(false));
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it('should be false if the argument is a function',
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() => expect(isObservable(() => {})).toEqual(false));
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});
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}
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