todo-list.effects.spec.ts

todo-list.effects.spec.ts

describe('TodoListEffects', () => {
	let actions: Observable<any>;
	let effects: TodoListEffects;

	beforeEach(() => {
		TestBed.configureTestingModule({
			providers: [
				TodoListEffects,
				provideMockActions(() => actions),
				mockProvider(TodoListResourcesService),
			],
		});

		effects = TestBed.inject(TodoListEffects);
	});
    
    it('should return a stream with todo list loaded action', () => {
      const todoList: TODOItem[] = [{ title: '', id: '1', description: '' }];
      const action = new LoadTodoList();
      const outcome = new TodoItemsLoaded(todoList);

      actions = hot('-a', { a: action });
      const response = cold('-a|', { a: todoList });
      todoListService.getTodos.and.returnValue(response);

      const expected = cold('--b', { b: outcome });
      expect(effects.loadTodoList$).toBeObservable(expected);
    });
});

@lydemann where does mockProvider come from?