Adapted book.effects.spec.ts from version 7.3.0 of ngrx/platform

book.effects.spec.ts

import * as fromBooks from '@example-app/books/reducers';
import * as fromSearch from '@example-app/books/reducers/search.reducer';
import * as fromChildBooks from '@example-app/books/reducers/books.reducer';
// Omitting autoimports
describe('BookEffects', () => {
  let effects: BookEffects;
  let actions$: Observable<any>;
  let store: MockStore<fromBooks.State>;
  const initialState = {
    books: {
      search: {} as fromSearch.State,
      books: {} as fromChildBooks.State,
      collection: {
        loaded: true,
        loading: false,
        ids: ['1']
      }
    }
  } as fromBooks.State;

  beforeEach(() => {
    TestBed.configureTestingModule({
      providers: [
        BookEffects,
        {
          provide: GoogleBooksService,
          useValue: { searchBooks: jest.fn() },
        },
        provideMockActions(() => actions$),
        provideMockStore({ initialState }),
      ],
    });

    effects = TestBed.get(BookEffects);
    actions$ = TestBed.get(Actions);
    store = TestBed.get(Store);
    spyOn(window, 'alert');
  });

  describe('addBookSuccess$', () => {
    it('should print congratulatory message when adding '
       + 'the first book', (done: any) => {
      const action = new AddBookSuccess(generateMockBook());
      actions$ = of(action);

      effects.addBookSuccess$.subscribe(() => {
        expect(window.alert)
          .toHaveBeenCalledWith(
            'Congrats on adding your first book!'
          );
        done();
      });
    });

    it('should print number of books after adding '
       + 'the first book', (done: any) => {
      store.setState({
        ...initialState,
        books: {
          search: {} as fromSearch.State,
          books: {} as fromChildBooks.State,
          collection: {
            loaded: true,
            loading: false,
            ids: ['1', '2']
          }
        }
      });

      const action = new AddBookSuccess(generateMockBook());
      actions$ = of(action);

      effects.addBookSuccess$.subscribe(() => {
        expect(window.alert)
          .toHaveBeenCalledWith(
            'You have added book number 2'
          );
        done();
      });
    });
  });
});