jestjs

问题 jest provides afterEach , beforeEach , afterAll and beforeAll to complete setup and teardown logic. What I would like to do, is to clear up after one particular test. Consider the following: describe("a family of tests it makes sense to group together", () => { ... test("something I want to test", () => { // some setup needed for just this test global.foo = "bar" // the test expect(myTest()).toBe(true) // clear up delete global.foo } ... } The problem with the above... If the test above fails

问题 I have a function (a Redux action) which calls 2 functions. I can't figure how how to test this with Jest: This is my function: import doSomething from 'redux/do-something'; import doSomethingElse from 'redux/do-something-else'; export default () => async dispatch => { await dispatch(doSomething()); dispatch(doSomethingElse()); }; This is my test: import doSomething from 'redux/do-something'; import doSomethingElse from 'redux/do-something-else'; import functionToTest from 'redux/function-to

问题 Having a really hard time setting up jest-test-mock in in my TypeScript project. I was wondering if someone could point me in the right direction? I've got a function that looks like this: retrieveData.ts import fetch from 'cross-fetch'; export async function retrieveData({ endpoint, configuration, auth }: dataInterface): Promise<object> { try { console.log('Fetching the requested data... 📦') const settings = configuration ? JSON.parse(render(configuration || '', auth)) : {} if (settings.body

问题 Detox Automation with Jest Hi, I am running detox tests form the CLI with the below command. detox test -r --maxWorkers 2 to achieve parallel execution. Already one simulator started with name iphone 5s-Detox and with the maxWorkers 2 or --workers 2, one more simulator is launching but the tests are executing in only one simulator. I want to execute tests in parallel to save the execution time. Can anyone share concept of detox jest parallel execution. Is this same as testNG or it's different

问题 I have a React Native project (not Expo) initialized with react native init myapp . I can run this application on Emulator and Real Device with Android 5, but cannot run the app on my Android Mobile with Android 8. Here's the package.json : { "name": "myapp", "version": "2.0.0", "private": true, "main": "lib/index.js", "scripts": { "start": "node node_modules/react-native/local-cli/cli.js start", "test": "jest" }, "dependencies": { "axios": "^0.18.0", "formik": "^1.5.1", "iso-639-1": "^2.0.3"

问题 If I want to create a mock implementation of an instance method of an ES6 Class I would do this // ExampleClass.js export class ExampleClass { constructor(someValue) { this.a = someValue; } exampleMethod(anotherValue) { // do something with 'anotherValue' } } // OtherModule.js import {ExampleClass} from './ExampleClass'; export const fooBar = () => { const ex = new ExampleClass("hello world"); ex.exampleMethod("another value"); }; // ExampleClass.test.js import {fooBar} from './OtherModule';

问题 If I want to create a mock implementation of an instance method of an ES6 Class I would do this // ExampleClass.js export class ExampleClass { constructor(someValue) { this.a = someValue; } exampleMethod(anotherValue) { // do something with 'anotherValue' } } // OtherModule.js import {ExampleClass} from './ExampleClass'; export const fooBar = () => { const ex = new ExampleClass("hello world"); ex.exampleMethod("another value"); }; // ExampleClass.test.js import {fooBar} from './OtherModule';

问题 I'm a very beginner with testing and started using jest. This function I have saves data in chrome.storage.local and I want to test if chrome.storage.local called 3 times. Here is the function: saveData: function(){ chrome.storage.local.set({'blackList': bgModule.blackList}, function() {}); chrome.storage.local.set({'pastDays': bgModule.pastDays}, function() {}); chrome.storage.local.set({'websiteList': bgModule.websiteList}, function() {}); } and here is my test: const bgModule = require("..

问题 I created a new ASP.NET Core React app using dotnet new react . Then I added some Jest unit tests, which run nicely when I run npm test on the command line. I would like to be able to run the tests from Visual Studio 2019, either using the Test Explorer window or ReSharper. First of all, it seems that ReSharper only supports Jasmine and not Jest (ReSharper documentation, Feature request). So I tried using the Test Explorer, following this official guide. It has support for Jest. However, the

问题 I am trying to understand this example, so the first thing I am trying is removing his axiosConfig.js , so the example looks more like the current case I would like to solve. However I get this error - Expected + Received Object { + "baseURL": "https://jsonplaceholder.typicode.com/albums", "method": "get", "url": "/3/photos?_limit=3", }, Number of calls: 1 39 | const photos = await getPhotosByAlbumID(3); 40 | expect(axios.request).toHaveBeenCalled(); > 41 | expect(axios.request)