类型'TestHotObservable‘中缺少“Subject<any>”类型中的以下属性:观察者、已关闭的、isStopped、hasError和其他5个

Question

我正在尝试实现简单的单元测试的效果。我正在尝试实现这个示例中的代码：https://github.com/ngrx/platform/blob/master/docs/effects/testing.md，但不幸的是，由于authActions，我无法编译代码。这一行：

authActions = hot('--a-', { a: action });

给了我编译错误，比如：

类型'TestHotObservable‘缺少’Subject‘类型中的下列属性:观察者、关闭的、isStopped、hasError等。

这里是代码片段：

import { AuthEffects } from "./auth.effects";
import { Subject } from 'rxjs';
import { TestBed } from '@angular/core/testing';
import { provideMockActions } from '@ngrx/effects/testing';
import * as AuthActions from './auth.actions';
import { hot, cold } from 'jasmine-marbles';
import { RouterTestingModule } from '@angular/router/testing';

describe('AuthEffects', () => {
    let authEffects: AuthEffects;
    let authActions: Subject<any>;

    beforeEach(() => {
        TestBed.configureTestingModule({
            imports: [
                RouterTestingModule
            ],
            providers: [
                AuthEffects,
                provideMockActions(() => authActions)
            ]
        });

        authEffects = TestBed.get(AuthEffects);
    });

    it('effect test', () => {
        let username = '';
        let password = '';
        let role = 'PARENT';
        const action = new AuthActions.TrySignin({ username, password, role });
        const completion = new AuthActions.SigninUser()

        authActions = hot('--a-', { a: action });
        const expected = cold('--b', { b: completion });

        expect(authEffects.authSignin).toBeObservable(expected);
    })
})

既然我是新手，我就没有主意了。这里可能出了什么问题？

Answer 1

您必须将操作定义为可观察的- https://ngrx.io/guide/effects/testing。

let actions: Observable<any>;

...

 it('should work', () => {
    actions = hot('--a-', { a: action });;
  });