angular-docs-cn/packages/zone.js/test/rxjs/rxjs.Observable.take.spec.ts

/**
 * @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 {interval, Observable, of} from 'rxjs';
import {take, takeLast, takeUntil, takeWhile} from 'rxjs/operators';

import {asyncTest} from '../test-util';

describe('Observable.take', () => {
  let log: any[];
  let observable1: Observable<any>;
  let defaultTimeout = jasmine.DEFAULT_TIMEOUT_INTERVAL;

  beforeEach(() => {
    log = [];
    jasmine.DEFAULT_TIMEOUT_INTERVAL = 10000;
  });

  afterEach(() => {
    jasmine.DEFAULT_TIMEOUT_INTERVAL = defaultTimeout;
  });

  it('take func callback should run in the correct zone', () => {
    const constructorZone1: Zone = Zone.current.fork({name: 'Constructor Zone1'});
    const subscriptionZone: Zone = Zone.current.fork({name: 'Subscription Zone'});
    observable1 = constructorZone1.run(() => {
      return of(1, 2, 3).pipe(take(1));
    });

    subscriptionZone.run(() => {
      observable1.subscribe(
          (result: any) => {
            log.push(result);
            expect(Zone.current.name).toEqual(subscriptionZone.name);
          },
          (err: any) => {
            fail('should not call error');
          },
          () => {
            log.push('completed');
            expect(Zone.current.name).toEqual(subscriptionZone.name);
            expect(log).toEqual([1, 'completed']);
          });
    });
  });

  it('takeLast func callback should run in the correct zone', () => {
    const constructorZone1: Zone = Zone.current.fork({name: 'Constructor Zone1'});
    const subscriptionZone: Zone = Zone.current.fork({name: 'Subscription Zone'});
    observable1 = constructorZone1.run(() => {
      return of(1, 2, 3).pipe(takeLast(1));
    });

    subscriptionZone.run(() => {
      observable1.subscribe(
          (result: any) => {
            log.push(result);
            expect(Zone.current.name).toEqual(subscriptionZone.name);
          },
          (err: any) => {
            fail('should not call error');
          },
          () => {
            log.push('completed');
            expect(Zone.current.name).toEqual(subscriptionZone.name);
            expect(log).toEqual([3, 'completed']);
          });
    });
  });

  xit('takeUntil func callback should run in the correct zone', asyncTest((done: any) => {
        const constructorZone1: Zone = Zone.current.fork({name: 'Constructor Zone1'});
        const subscriptionZone: Zone = Zone.current.fork({name: 'Subscription Zone'});
        observable1 = constructorZone1.run(() => {
          return interval(10).pipe(takeUntil(interval(25)));
        });

        subscriptionZone.run(() => {
          observable1.subscribe(
              (result: any) => {
                log.push(result);
                expect(Zone.current.name).toEqual(subscriptionZone.name);
              },
              (err: any) => {
                fail('should not call error');
              },
              () => {
                log.push('completed');
                expect(Zone.current.name).toEqual(subscriptionZone.name);
                expect(log).toEqual([0, 1, 'completed']);
                done();
              });
        });
      }, Zone.root));

  it('takeWhile func callback should run in the correct zone', asyncTest((done: any) => {
       const constructorZone1: Zone = Zone.current.fork({name: 'Constructor Zone1'});
       const takeZone1: Zone = Zone.current.fork({name: 'Take Zone1'});
       const subscriptionZone: Zone = Zone.current.fork({name: 'Subscription Zone'});
       observable1 = constructorZone1.run(() => {
         return interval(10);
       });

       observable1 = takeZone1.run(() => {
         return observable1.pipe(takeWhile((val: any) => {
           expect(Zone.current.name).toEqual(takeZone1.name);
           return val < 2;
         }));
       });

       subscriptionZone.run(() => {
         observable1.subscribe(
             (result: any) => {
               log.push(result);
               expect(Zone.current.name).toEqual(subscriptionZone.name);
             },
             (err: any) => {
               fail('should not call error');
             },
             () => {
               log.push('completed');
               expect(Zone.current.name).toEqual(subscriptionZone.name);
               expect(log).toEqual([0, 1, 'completed']);
               done();
             });
       });
     }, Zone.root));
});