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

/**
 * @license
 * Copyright Google Inc. 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 {Observable, of} from 'rxjs';
import {catchError, map, retry} from 'rxjs/operators';

describe('Observable.catch', () => {
  let log: any[];
  let observable1: Observable<any>;

  beforeEach(() => {
    log = [];
  });

  it('catch 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(() => {
      const error = new Error('test');
      const source = of(1, 2, 3).pipe(map((n: number) => {
        expect(Zone.current.name).toEqual(constructorZone1.name);
        if (n === 2) {
          throw error;
        }
        return n;
      }));
      return source.pipe(catchError((err: any) => {
        expect(Zone.current.name).toEqual(constructorZone1.name);
        return of('error1', 'error2');
      }));
    });

    subscriptionZone.run(() => {
      const subscriber = observable1.subscribe(
          (result: any) => {
            expect(Zone.current.name).toEqual(subscriptionZone.name);
            log.push(result);
          },
          () => {
            fail('should not call error');
          },
          () => {
            log.push('completed');
            expect(Zone.current.name).toEqual(subscriptionZone.name);
          });
    });
    expect(log).toEqual([1, 'error1', 'error2', 'completed']);
  });

  it('retry 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'});
    const error = new Error('test');
    observable1 = constructorZone1.run(() => {
      return of(1, 2, 3).pipe(
          map((n: number) => {
            expect(Zone.current.name).toEqual(constructorZone1.name);
            if (n === 2) {
              throw error;
            }
            return n;
          }),
          retry(1));
    });

    subscriptionZone.run(() => {
      const subscriber = observable1.subscribe(
          (result: any) => {
            expect(Zone.current.name).toEqual(subscriptionZone.name);
            log.push(result);
          },
          (error: any) => {
            expect(Zone.current.name).toEqual(subscriptionZone.name);
            log.push(error);
          },
          () => {
            log.push('completed');
            expect(Zone.current.name).toEqual(subscriptionZone.name);
          });
    });
    expect(log).toEqual([1, 1, error]);
  });
});