jestjs

问题 I've seen similar questions but still can't find a viable solution. I'm trying to integrate Jest into a working project, which uses import/export default in hundreds of places. The following test does work for Jest using require: const bar = require('../../flows/foo'); test('adds 1 + 2 to equal 3', () => { expect(bar.foobar(1, 2)).toBe(3); }); when export is: module.exports = { foobar: foobar, fizz: fizz } The functions I'll want to be testing however are exported using: export default {

问题 I've seen similar questions but still can't find a viable solution. I'm trying to integrate Jest into a working project, which uses import/export default in hundreds of places. The following test does work for Jest using require: const bar = require('../../flows/foo'); test('adds 1 + 2 to equal 3', () => { expect(bar.foobar(1, 2)).toBe(3); }); when export is: module.exports = { foobar: foobar, fizz: fizz } The functions I'll want to be testing however are exported using: export default {

问题 I've seen similar questions but still can't find a viable solution. I'm trying to integrate Jest into a working project, which uses import/export default in hundreds of places. The following test does work for Jest using require: const bar = require('../../flows/foo'); test('adds 1 + 2 to equal 3', () => { expect(bar.foobar(1, 2)).toBe(3); }); when export is: module.exports = { foobar: foobar, fizz: fizz } The functions I'll want to be testing however are exported using: export default {

问题 I am developing a React app using Typescript, and hooks, and I am trying to use Enzyme with Jest to test the function components. I am unable to use jest.spyOn to test a method in my component. The jest.spyOn method doesn't resolve correctly and shows following message on hover "Argument of type '"validateBeforeSave"' is not assignable to parameter of type '"context" | "setState" | "forceUpdate" | "render" | "componentDidMount" | "shouldComponentUpdate" | "componentWillUnmount" |

问题 I have replicated an example to understand the testing of Mock-async-storage for reactjs. Any suggestions for a different approach of testing are welcome. I tried to replicate the use case from this stack overflow page : How to test Async Storage with Jest? but I couldn't figure out how that would fit for my sample case. So I tried the below npm module https://github.com/devmetal/mock-async-storage, but that didn't help either. Code written in Example.test.js import AsyncStorage from '@react

问题 I am trying to test the responsiveness of the application I am building in reactjs using jest and enzyme. How can I do that? I have a sidebar which transitions left and disappears when the screen size is less than or equal to 1024px. I went through this - Figuring out how to mock the window size changing for a react component test stackoverflow question to simulate/mock a screen resize. Then I tried using DOM functions like getComputedStyle to see if the css rule for transition is applied to

问题 I am trying to test the responsiveness of the application I am building in reactjs using jest and enzyme. How can I do that? I have a sidebar which transitions left and disappears when the screen size is less than or equal to 1024px. I went through this - Figuring out how to mock the window size changing for a react component test stackoverflow question to simulate/mock a screen resize. Then I tried using DOM functions like getComputedStyle to see if the css rule for transition is applied to

问题 Our unit tests run in containers in our continuous delivery pipelines. Sometimes, we don't handle rejections in our unit tests, however, I don't think it's correct and in my opinion the pipeline should fail. How can I make sure that when I execute jest and during the tests an unhandledRejection event occurs, jest will exit with error? I tried to hook event listeners in a setup script: /* jest.config.js */ module.exports = { setupFiles: ['<rootDir>/test/setup.ts'], // ... } and in that setup

问题 When using jest.fn() to add a mock you can usually access the .mock property to access details such as calls, something similar to this: test('not working', () => { const foo = new Foo(); foo.addListener = jest.fn(); foo.func(); // will call addListener with a callback const callback = foo.addListener.mock.calls[0][0]; expect(callback()).toEqual(1); // test the callback }); When implementing the test in typescript instead of plain javascript I get the error: error TS2339: Property 'mock' does

问题 I am writing unit test in NX angular workspace. sometimes it is giving error like this : (node:15320) UnhandledPromiseRejectionWarning: TypeError: Converting circular structure to JSON --> starting at object with constructor 'Object' | property 'element' -> object with constructor 'Object' | property 'componentProvider' -> object with constructor 'Object' --- property 'parent' closes the circle at stringify (<anonymous>) at writeChannelMessage (internal/child_process/serialization.js:117:20)