angular - 在 beforeEach 中声明变量

Question

我得到

ReferenceError: initialState is not defined

当我在 beforeEach(()=> {... 中将 initialState 声明为 const 时.那不应该工作吗？

describe('register reducer', () => {
        beforeEach(() => {
            const initialState = UsersService.getInitialUsersState();
        })

        it('should return the initial state', () => {
            expect(usersReducer(undefined, [])).toEqual(initialState);
        });

        it('Toggle isBaby or sitter', () => {
            deepFreeze(initialState);
            let newState = initialState;
            newState.isBaby = true;

            expect(
                usersReducer(initialState, {
                    type: types.UsersActions.SET_TYPE,
                    payload: true
                })).toEqual(newState);
        });

Answer 1

虽然beforeEach确实如此在每次测试之前运行，如果你这样做，initialState仅在 beforeEach 的范围内可见，改成这样:

describe('register reducer', () => {
  let initialState;
  beforeEach(() => {
      initialState = UsersService.getInitialUsersState();
  })
  ...