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在beforeach中声明变量

variable-declaration const unit-testing angular

1

July333 · 技术社区 · 7 年前

我明白了

ReferenceError:未定义initialState

当我在中声明initialState为const时 beforeEach(()=> {... . 这不应该有效吗?

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);
        });

2 回复 | 直到 7 年前

1

3

bugs 7 年前

虽然这是真的 beforeEach 在每次测试前运行,如果你这样做, initialState 在每个人之前

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

2

brianyang 6 年前

这个问题真的很老了,但是在这里为遇到这个问题的其他人树立一个有效的例子。你可以这样做:

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