如何強制Jest單元測試斷言在測試結束之前執行？

Question

我在我的反應本機應用程序下面的測試，但測試應該會失敗（因為返回的動作不等於我把行動expectedActions 。我的猜測是，它是通過因為expect測試的測試完成后運行。

如何強制測試等待，直到諾言完成並且期望測試運行？ 還有另一種方法嗎？

describe('authorize actions', () => {
    beforeEach(() => {
        store = mockStore({});
    });

    it('should create an action to signify successful auth', () => {
        auth.authorize.mockImplementation(() => Promise.resolve({"something": "value"}));
        const expectedActions = [{"type":"AUTHORIZE_RESPONSE","payload":{"something":"sdklfjsdf"}}];

        authorizeUser(store.dispatch, store.state).then(() => {
            expect(store.getActions()).toEqual(expectedActions);
        });

    })
});

Answer 1

好的，看來我只是錯過了一些Jest文檔-如果您返回諾言，即return auth.authorize.mockImplementation(() => Promise.resolve...那么Jest將等待直到完成為止再繼續。

Answer 2

有多種測試異步代碼的方法。 檢查文檔以獲取示例： https : //facebook.github.io/jest/docs/en/asynchronous.html

一個人可能正在兌現承諾：

describe('authorize actions', () => {
beforeEach(() => {
    store = mockStore({});
});

it('should create an action to signify successful auth', () => {
    auth.authorize.mockImplementation(() => Promise.resolve({"something": "value"}));
    const expectedActions = [{"type":"AUTHORIZE_RESPONSE","payload":{"something":"sdklfjsdf"}}];

    return authorizeUser(store.dispatch, store.state).then(() => {
        expect(store.getActions()).toEqual(expectedActions);
    });

})

}）;