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fix(common): introduce isObservable method (#14067)

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Closes #8848

PR Close #14067
This commit is contained in:
Dzmitry Shylovich
2017-01-23 20:48:04 +03:00
committed by Miško Hevery
parent fe441186e7
commit ff290af38c
7 changed files with 51 additions and 6 deletions
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21
modules/@angular/core/test/util/lang_spec.ts
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@ -5,7 +5,8 @@
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {isPromise} from '@angular/core/src/util/lang';
import {isObservable, isPromise} from '@angular/core/src/util/lang';
import {of } from 'rxjs/observable/of';
export function main() {
describe('isPromise', () => {
@ -25,4 +26,22 @@ export function main() {
expect(isPromise(null)).toEqual(false);
});
});
describe('isObservable', () => {
it('should be true for an Observable', () => expect(isObservable(of (true))).toEqual(true));
it('should be false if the argument is undefined',
() => expect(isObservable(undefined)).toEqual(false));
it('should be false if the argument is null', () => expect(isObservable(null)).toEqual(false));
it('should be false if the argument is an object',
() => expect(isObservable({})).toEqual(false));
it('should be false if the argument is a function',
() => expect(isObservable(() => {})).toEqual(false));
it('should be false if the argument is the object with subscribe function',
() => expect(isObservable({subscribe: () => {}})).toEqual(false));
});
}