我要测试的函数中有一个 try/catch block 。两个函数调用相同的 execute
函数,如果它抛出错误将捕获。我的测试设置在我在顶部附近模拟模块的地方,然后我可以验证该 jest 函数被调用了多少次。
我似乎无法弄清楚如何强制 execute
在第二次测试中抛出错误,然后返回默认的模拟实现。我尝试在个人测试中重新分配 jest.mock ,但它似乎不起作用。
import {execute} from '../src/execute'
jest.mock('../src/execute', () => ({
execute: jest.fn()
}))
describe('git', () => {
afterEach(() => {
Object.assign(action, JSON.parse(originalAction))
})
describe('init', () => {
it('should stash changes if preserve is true', async () => {
Object.assign(action, {
silent: false,
accessToken: '123',
branch: 'branch',
folder: '.',
preserve: true,
isTest: true,
pusher: {
name: 'asd',
email: 'as@cat'
}
})
await init(action)
expect(execute).toBeCalledTimes(7)
})
})
describe('generateBranch', () => {
it('should execute six commands', async () => {
jest.mock('../src/execute', () => ({
execute: jest.fn().mockImplementation(() => {
throw new Error('throwing here so. I can ensure the error parsed properly');
});
}))
Object.assign(action, {
silent: false,
accessToken: '123',
branch: 'branch',
folder: '.',
pusher: {
name: 'asd',
email: 'as@cat'
}
})
// With how this is setup this should fail but its passing as execute is not throwing an error
await generateBranch(action)
expect(execute).toBeCalledTimes(6)
})
})
})
任何帮助,将不胜感激!
最佳答案
jest.mock
在 should execute six commands
不影响 ../src/execute
模块,因为它已经在顶层导入。jest.mock
在顶层已经 mock execute
与 Jest spy 。最好使用 Once
实现不影响其他测试:
it('should execute six commands', async () => {
execute.mockImplementationOnce(() => {
throw new Error('throwing here so. I can ensure the error parsed properly');
});
...
也应该强制模拟为 ES 模块,因为 execute
被命名为进口:jest.mock('../src/execute', () => ({
__esModule: true,
execute: jest.fn()
}))
关于javascript - 强制模块模拟在测试中抛出错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/64391077/