Questions tagged [ts-jest]

My function extracts meta data such as width and height from a video element in the following code snippet: export async function getVideoMetadata( videoBlobUrl: string, videoElement: HTMLVideoElement, ): Promise<{ width: number; height: number }> ...

I am encountering some difficulties trying to make jest work in my nextjs application. Whenever I use the script "jest", the execution fails and I get the following result: FAIL __tests__/index.test.tsx ● Test suite failed to run ...

What is the best way to test dialogref coming from MatDialogRef? dialogRef: MatDialogRef<testComponent>; displayBackdrop() { const backdrop = this.dialogRef['_ref'].overlayRef._backdropElement.style.display = 'block' ...

Currently in the process of setting up Jest for Angular 9 using jest-preset-angular version 9. The code is running, but encountering the error: Error: Cannot read property 'ngModule' of null Uncertain on how to troubleshoot this issue. https:/ ...

I am encountering an issue with my Typescript project that contains two files, a.ts and b.ts. In a.ts, I have imported b.ts using the following syntax: import * from "./b.js" While this setup works smoothly with Typescript, Jest (using ts-jest) ...

Currently, I am in the process of learning how to build an API with TypeScript and experimenting with testing it using the Jest framework. When utilizing a basic Express application like app = express() supertest(app) everything works smoothly. However, ...

I am currently delving into the world of jest testing. Here is a snippet from an implementation class I'm working with: import { ExternalObject } from 'external-library'; export class MyClass { public createInstance(settings : ISettings) : ExternalObjec ...

Currently, I am facing an issue with my react component that utilizes translations from i18next. Despite trying to create tests for it using JEST, nothing seems to be getting translated. I attempted to mock the useTranslation function as shown below: cons ...

https://i.stack.imgur.com/Cvon1.png I've encountered an issue while trying to set up ts-jest in a new project. Here's what I've tried: $ mkdir test && cd test $ npm init -y $ npm install ts-jest Despite being able to install other packages withou ...

Currently delving into the world of NestJS and feeling a bit perplexed about the workings of "modules". In my project, I have two modules namely JokesModule and ChuckNorrisApiModule. My goal is to utilize the service provided by ChukNorrisService within th ...

Upon including setupFilesAfterEnv in the jest.config.js like this: module.exports = { preset: 'ts-jest', testEnvironment: 'node', setupFilesAfterEnv: ["./test/setupAfterEnv.ts"] } The mock functions seem to sto ...

It has become clear that I am struggling with the functionality of this code, especially when it comes to testing with Jest. Despite my efforts to use an await...of loop, I am not getting any output. The file path provided to the generator is correct and I ...

I've developed unique Jest matchers to enhance expect for handling AxiosResponse objects. Although I've followed the standard method for expanding Jest's matcher types, my custom matchers are not being recognized by TypeScript. The error displayed in VSCo ...

I have set up a node project using TypeScript and configured various paths in my tsconfig.json file, such as: "paths": { /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */ ...

//CustomConfigurator.ts export default function customizeConfig(name: string): string { // add some custom logic here return output; } //CustomUtility.ts import customizeConfig from './CustomConfigurator'; export default class CustomUtility ...

Problem I am encountering an issue while trying to mock a function that is imported from another class and called within the main class. Although I can successfully mock the function and return the specified values, I am unable to revert the mocked functi ...

I am currently using Vue 3 along with Jest for testing purposes. I have created a simple code snippet to test, which is displayed below. Following some suggestions on Stack Overflow, I made some modifications to the babel.config.js and package.json files a ...

Typically, I only test files ending with .ts, but this time I have a file containing utility methods that return a react element. Therefore, my file has a .tsx extension and includes components from material ui and other libraries. Initially, I encountere ...

Currently, I am utilizing Material UI components from mui.com with styled-components instead of the default emotion library. I have made changes to my tsconfig.json file to include: "compilerOptions": { ..., "paths": { .. ...

I am working on a TypeScript project and I have defined my configurations in the tsconfig.json file as shown below: { "include": ["src*"], "compilerOptions": { "target": "es2021", &q ...

In my custom package located at https://github.com/Voitanos/jest-preset-spfx, I have specified the following dependencies: "dependencies": { "@types/jest": "28.1.4", "identity-obj-proxy": "3.0.0", &qu ...

Unit testing is a new concept for me, especially when dealing with reactive state in components. I am looking to write unit tests for a component that contains reactive state. Below is an example of the test component: <script setup lang="ts" ...

With Jest, I successfully mocked and implemented a method for the first test case. However, for the second test case (testcase2), I am struggling to implement the same mock method with different input. jest.mock('../../lib/testService', () => ({ TestS ...

Is there a way to spy on unexported functions that are defined within a function component using JEST? const ProfilePage: NextPage<Props> = ({ const getUser = () => { return { name: 'Joker', } } return ( <Box>Hello world</Box&g ...

app.js var todos=[]; todos=['to-do one', 'to-do two']; module.exports=todos; app.test.js const todos=require('./app') test('should have a length of at least 0',()=>{ expect(todos.length).toBeGreaterThanOrEqual(0) }) ...