angular-cn/packages/zone.js/test/rxjs/rxjs.combineLatest.spec.ts

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/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* 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 {combineLatest, Observable} from 'rxjs';
describe('Observable.combineLatest', () => {
let log: any[];
const constructorZone1: Zone = Zone.current.fork({name: 'Constructor Zone1'});
const constructorZone2: Zone = Zone.current.fork({name: 'Constructor Zone2'});
const constructorZone3: Zone = Zone.current.fork({name: 'Constructor Zone3'});
const subscriptionZone: Zone = Zone.current.fork({name: 'Subscription Zone'});
let observable1: Observable<any>;
let observable2: any;
let subscriber1: any;
let subscriber2: any;
let combinedObservable: any;
beforeEach(() => {
log = [];
});
it('combineLatest func should run in the correct zone', () => {
observable1 = constructorZone1.run(() => new Observable((_subscriber) => {
subscriber1 = _subscriber;
expect(Zone.current.name).toEqual(constructorZone1.name);
log.push('setup1');
}));
observable2 = constructorZone2.run(() => new Observable((_subscriber) => {
subscriber2 = _subscriber;
expect(Zone.current.name).toEqual(constructorZone2.name);
log.push('setup2');
}));
constructorZone3.run(() => {
combinedObservable = combineLatest(observable1, observable2);
});
subscriptionZone.run(() => {
combinedObservable.subscribe((combined: any) => {
expect(Zone.current.name).toEqual(subscriptionZone.name);
log.push(combined);
});
});
subscriber1.next(1);
subscriber2.next(2);
subscriber2.next(3);
expect(log).toEqual(['setup1', 'setup2', [1, 2], [1, 3]]);
});
it('combineLatest func with project function should run in the correct zone', () => {
observable1 = constructorZone1.run(() => new Observable((_subscriber) => {
subscriber1 = _subscriber;
expect(Zone.current.name).toEqual(constructorZone1.name);
log.push('setup1');
}));
observable2 = constructorZone2.run(() => new Observable((_subscriber) => {
subscriber2 = _subscriber;
expect(Zone.current.name).toEqual(constructorZone2.name);
log.push('setup2');
}));
constructorZone3.run(() => {
combinedObservable = combineLatest(observable1, observable2, (x: number, y: number) => {
expect(Zone.current.name).toEqual(constructorZone3.name);
return x + y;
});
});
subscriptionZone.run(() => {
combinedObservable.subscribe((combined: any) => {
expect(Zone.current.name).toEqual(subscriptionZone.name);
log.push(combined);
});
});
subscriber1.next(1);
subscriber2.next(2);
subscriber2.next(3);
expect(log).toEqual(['setup1', 'setup2', 3, 4]);
});
});