(received).toEqual(expected) Expected value to equal: {"postIds": [1], "posts": {"1": {"id": 1...(url).toBe("/api/authenticate") expect(body).toEqual({ username, password }) expect(commit).toHaveBeenCalledWith...$nextTick() expect(mutations.testMutation).toHaveBeenCalledWith( {}, { msg: "Test Commit...$nextTick() expect(mockStore.dispatch).toHaveBeenCalledWith( "testAction" , { msg: "Test Dispatch...$nextTick() expect(store.dispatch).toHaveBeenCalledWith( 'namespaced/very/deeply/testAction',
) expect(res.json).toHaveBeenCalledWith({ posts: expect.arrayContaining([ expect.objectContaining...) expect(res.json).toHaveBeenCalledWith({ posts: [], }) }) 找到其中的差别了么？...(res.json).toHaveBeenCalledTimes(1) expect(res.json).toHaveBeenCalledWith({ posts: expect.arrayContaining...(res.json).toHaveBeenCalledTimes(1) expect(res.json).toHaveBeenCalledWith({ posts: [], }) })...(handleSubmit).toHaveBeenCalledTimes(1) expect(handleSubmit).toHaveBeenCalledWith({username, password
你玩纸牌， 如果当天晚上你赢的局数比例 大于 p， 就去睡觉， 第二天继续。 如果小于等于p， 就去睡觉， 并且以后都不玩了。
) { return cb(42) } } it('test with mock function', () => { // 创建一个假的函数实现 const mockCB = jest.fn...mockCB).toHaveBeenCalledWith(42) // 被调用的次数 expect(mockCB).toHaveBeenCalledTimes(1) // 函数调用 console.log...shouldCall) { return cb(42) } } it('test with mock implementation', () => { const mockCB = jest.fn...const axios = { get: jest.fn(() => Promise.resolve({ data: { username: "warbler" } })) } module.exports...expect(callback).toHaveBeenCalled() // 调用的参数 expect(callback).toHaveBeenCalledWith('hello') })
.rejects .toBe(value) .toHaveBeenCalled() .toHaveBeenCalledTimes(number) .toHaveBeenCalledWith(arg1,...例如如果你想检查一个模拟函数是否被调用，它的参数是非空的: test('map calls its argument with a non-null argument', () => { const mock = jest.fn...Math.random() * 6 + 1)); } test('randocall calls its callback with a number', () => { const mock = jest.fn...(expected) ); }); it('does not match without an expected number 2', () => { expect([4, 1,...test('onPress gets called with the right thing', () => { const onPress = jest.fn(); simulatePresses
).toHaveBeenCalled();// 检查函数调用的具体参数expect(myFunction).toHaveBeenCalledWith(expectedArgs);// 重置模拟myFunction.mockReset...确保它们在测试环境中正确执行：import { act } from 'react-dom/test-utils';it('calls componentDidMount', () => { const mockFn = jest.fn...});测试事件处理器使用fireEvent模拟事件，但要确保在act中进行：it('calls onChange handler', () => { const onChangeHandler = jest.fn...(onChangeHandler).toHaveBeenCalledWith('new value');});性能优化快速测试减少渲染深度：只渲染必要的组件层级，避免渲染整个组件树。...使用jest.spyOn代替jest.fn：对于性能敏感的函数，使用jest.spyOn代替jest.fn，因为它更快。
).toHaveBeenCalledWith(fakeData)); expect(login).toHaveBeenCalledTimes(1); // 文档中没有 loading...).toHaveBeenCalledWith(fakeData)); expect(login).toHaveBeenCalledTimes(1); // 确保文档中有服务端返回的消息...).toHaveBeenCalledWith(); }); 通过 toHaveBeenCalledTimes 测试调用次数，通过 toHaveBeenCalledWith 测试调用方法的参数，虽然这边是空数据...(screen.getByText("Loading...")).toBeInTheDocument(); expect(fetchPosts).toHaveBeenCalledWith();...).toHaveBeenCalledWith(); expect(fetchPosts).toHaveBeenCalledTimes(1); }); 小结 以下是测试异步组件的步骤: 通过
()', () => { let mockFn = jest.fn(); let result = mockFn(1, 2, 3); expect(result).toBeUndefined...(); expect(mockFn).toHaveBeenCalledWith(1, 2, 3); expect(mockFn).toBeCalled(); expect(mockFn).toBeCalledTimes...(1); }); test('sum(5, 5) ', () => { expect(mock_function.sum(5, 5)).toBe(10); }); test('测试jest.fn...()返回固定值', () => { let mockFn = jest.fn().mockResolvedValue('default'); expect(mockFn).toBe('default...; }); expect(mockFn(9, 9)).toBe(100); }); test('测试jest.fn()返回promise', async () => { let mockFn
(container); container.remove(); container = null; }); it("点击时更新值", () => { const onChange = jest.fn...container); container.remove(); container = null; }); it("超时后应选择 null", () => { const onSelect = jest.fn...(onSelect).toHaveBeenCalledWith(null); }); it("移除时应进行清理", () => { const onSelect = jest.fn(); act...(onSelect).not.toHaveBeenCalled(); }); it("应接受选择", () => { const onSelect = jest.fn(); act(() =>...(onSelect).toHaveBeenCalledWith(2); }); 你只能在某些测试中使用假计时器。
(button.textContent).toBe('3') fireEvent.click(button) expect(button.textContent).toBe('4') expect...(received).toBe(expected) // Object.is equality Expected: "4" Received: "3" 23 | fireEvent.click...(button) 24 | expect(button.textContent).toBe('4') > 25 | expect(window.localStorage.getItem.../counter.js'function renderCounter(props) { let utils const children = jest.fn(stateAndHelpers => {...(children).toHaveBeenCalledWith(expect.objectContaining({count: 0})) increment() expect(children).toHaveBeenCalledWith
(Promise.resolve({})), scrollToField: jest.fn() }, submitFormData: jest.fn() }; return...validateFields).toHaveBeenCalled(); expect(saveAgreementLog).toHaveBeenCalledWith({ sceneTypeCode...scrollToField).toHaveBeenCalledWith('errorField', { behavior: 'smooth' }); }); }); Antd Form...(btnEle).toBeInTheDocument(); expect(apis.createInterviewAjax).toHaveBeenCalledWith({ oppositeImId...(setTimeout).toHaveBeenCalledWith(expect.any(Function), 1000); }); }); Mock 网页地址 describe("网页地址的Mock
Jest Mock 的常用 API 是：jest.fn () 和 jest.mock ()。...2.3.1 jest.fn() 通过 jest.fn(implementation) 可以创建 mock 函数。如果没有定义函数内部的实现，mock 函数会返回 undefined。...(2); // 断言mockFn传入的参数为a,b,c expect(mockFn).toHaveBeenCalledWith('a','b','c'); // 定义implementation，自定义函数体...const returnSomething = jest.fn().mockReturnValue('hello world'); expect(returnSomething()).toBe('hello...(), off: jest.fn(), emit: jest.fn(), }; describe('dropdown test', () => { it('render Dropdown
snapshot it('Input render correctly', () => { const wrapper = render(); expect...onChange: (value) => {}, }; const wrapper = mount(); expect...it('Input check the onChange callback', () => { const onChange = jest.fn(); const props...props} />).find('input'); wrapper.simulate('change', { target: { value: 888888 } }); expect...(onChange).toHaveBeenCalledWith(888888); }); 上面的仓库都可以在我的 Github 上找到完整的代码 -> react-component-test-demo
appRender, screen, userEvent, fireEvent, waitFor } from "@/testing/test-utils"; const router = { push: jest.fn...); expect(locationInput).toHaveValue(jobData.location); expect(infoInput).toHaveValue(jobData.info...); userEvent.click(submitButton); expect(router.push).toHaveBeenCalledWith("/dashboard/..., screen, fireEvent, userEvent, waitFor } from "@/testing/test-utils"; const router = { replace: jest.fn...(router.replace).toHaveBeenCalledWith("/dashboard/jobs"); }); }); }); # E2E 测试 端到端测试是一种将应用程序作为完整实体进行测试的测试方法
jest.fn() jest.fn()是创建mock函数最简单的方式，如果没有定义函数内部的实现，jest.fn()会返回undefined作为返回值。...// functions.test.js test('测试jest.fn()调用', () => { let mockFn = jest.fn(); let res = mockFn('厦门'...expect(mockFn).toHaveBeenCalledWith('厦门','青岛','三亚'); }) jest.fn()所创建的mock函数还可以设置返回值，定义内部实现或返回Promise...'); // 断言mockFn执行后返回值为default expect(mockFn()).toBe('default'); }) test('测试jest.fn()内部实现', () =>...{ let mockFn = jest.fn((num1, num2) => { return num1 + num2; }) // 断言mockFn执行后返回20 expect
(expected) toBeGreaterThanOrEqual(expected) toBeInstanceOf(expected) toBeLessThan(expected) toBeLessThanOrEqual...toBeUndefined() toContain(expected) toEqual(expected) toHaveBeenCalled() toHaveBeenCalledBefore(expected...) toHaveBeenCalledOnceWith() toHaveBeenCalledTimes(expected) toHaveBeenCalledWith() toHaveClass(expected...it ('will call onClick prop when click event fired', () => { const fn = jest.fn(); wrapper.setProps...it ('will call onClick prop when click event fired', () => { const fn = jest.fn(); wrapper.setProps
(button.disabled).toBe(true) // error message: // expect(received).toBe(expected) // Object.is equality...// // Expected: true // Received: false // ✅ expect(button).toBeDisabled() // error message: //...).toHaveBeenCalledWith('foo') expect(window.fetch).toHaveBeenCalledTimes(1) // ✅ await waitFor(() =>...expect(window.fetch).toHaveBeenCalledWith('foo')) expect(window.fetch).toHaveBeenCalledTimes(1) waitFor...waitFor(() => expect(window.fetch).toHaveBeenCalledWith('foo')) expect(window.fetch).toHaveBeenCalledTimes
Stub 用于模拟特定行为 const mockFn = jest.fn(); mockFn(); expect(mockFn).toHaveBeenCalled(); // With a mock...，jest.fn() 代表着我就是一个 Stub（桩），“你来我就在这里，你走我也依然在这里，风雨无阻”。...query, onchange: null, addListener: jest.fn(), removeListener: jest.fn(), }; }); 把全局的数据...(result).toEqual(expected) }) Reducer 很容易被测试，因为它们仅仅是一些完全依赖参数的函数。...(result).toEqual(expected) }) Action 应对起来略微棘手，因为它们可能需要调用外部的 API。
，则不会走catch expect.assertions(1); return fetchData2().catch((e) => { expect(e.toString()....回调函数 const func2 = jest.fn(() => { return 456 }) // 等价于 func2.mockImplementation(() => {.../es6-class') jest.mock 如果发现是一个类，会自动把构造函数和方法变成 jest.fn() 以提升性能，相当于执行了 const Util = jest.fn() Util.a =...jest.fn() Util.b = jest.fn() 【2】自定义 jest.mock 传参 jest.mock('....Util.prototype.a = jest.fn(() => { console.log('a --') }) Util.prototype.b = jest.fn() export default
(fetchUser).toHaveBeenCalled(); expect($('#nick').text()).toEqual('mc-zone'); }); }); 最后可以测试执行的结果...)require.requireMock(moduleName) jest.resetAllMocks() jest.disableAutomock() jest.enableAutomock() jest.fn...value) 在被调用后，mock function 会自动记录每次的调用信息，例如我想拿到第 m 次被调用时的第 n 个参数，就可以通过 mock.calls 来访问到: var myMock = jest.fn...(fetchUser).toHaveBeenCalled(); 可用的断言 API: .toHaveBeenCalled() .toHaveBeenCalledWith(arg1, arg2, ....../timerGame'); timerGame(); expect(setTimeout.mock.calls.length).toBe(1); expect(setTimeout.mock.calls
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