/**
 * @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, merge, Observable} from 'rxjs';
import {map, take} from 'rxjs/operators';

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

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

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

  it(
    'merge func callback should run in the correct zone',
    asyncTest((done: 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'});
      const observable1: any = constructorZone1.run(() => {
        return interval(8).pipe(
          map((v) => 'observable1' + v),
          take(1),
        );
      });

      const observable2: any = constructorZone2.run(() => {
        return interval(10).pipe(
          map((v) => 'observable2' + v),
          take(1),
        );
      });

      const observable3: any = constructorZone3.run(() => {
        return merge(observable1, observable2);
      });

      subscriptionZone.run(() => {
        const subscriber = observable3.subscribe(
          (result: any) => {
            log.push(result);
            expect(Zone.current.name).toEqual(subscriptionZone.name);
          },
          () => {
            fail('should not call error');
          },
          () => {
            log.push('completed');
            expect(Zone.current.name).toEqual(subscriptionZone.name);
            expect(log).toEqual(['observable10', 'observable20', 'completed']);
            done();
          },
        );
      });
    }, Zone.root),
  );
});
