1,658
questions
0
votes
1
answer
18
views
Mock being ignored, jest node
I'm trying mock a database with this test but the mock seems to be ignored. I can't think of a reason this could be?
import { jest } from '@jest/globals';
jest.mock('../database', () => ({
...
- 615
-1
votes
0
answers
32
views
Can't add custom matcher to expect because of TypeError
I'm having problems adding a custom matcher to Jest. This example from the Jest docs doesn't work in VS Code:
import {expect} from '@jest/globals';
import type {MatcherFunction} from 'expect';
const ...
- 59
0
votes
0
answers
91
views
Jest encountered an unexpected token, In React app
I'm trying to run the test case for the app. But its showing below error. Can someone help me to clear the issue.
Attaching the code repo.
https://github.com/Arun12Muralidharan/team_tracker
I can't ...
0
votes
0
answers
17
views
Can not test shadcn input otp component with Jest
I'm creating an OTP page using Shadcn Input-OTP.
Before importing input-otp component. All tests are running fine.
But when it tries to run this component. it gives:
ReferenceError: ResizeObserver is ...
- 558
0
votes
1
answer
40
views
Warning: React.jsx: type is invalid -- expected a string (for built-in components) or a class/function (for composite components)
This issue occurs when Jest fails to load SVG files.
The error details are as follows:
Warning: React.jsx: type is invalid -- expected a string (for built-in components) or a class/function (for ...
- 333
0
votes
0
answers
43
views
I'm getting an error when running tests with jest and remix
I'm getting an error when running tests with jest and remix
I'm trying to set up a project using remix and I took the test I saw in the doc as an example to test in the project and I'm getting an ...
0
votes
0
answers
70
views
.env variables are not being loaded/read correctly
Our project is a React and TypeScript project made with React App Rewired first, but migrated to Vite now.
I have been working on getting Jest to work (after trying to use Vitest, where I ran into ...
- 9
0
votes
0
answers
38
views
NestJS not injecting mocked module unless provider tokens are used
I'm writing unit tests for a sandbox project to test a few things in NestJS. I've run into an issue where a class that takes an injected service (authService) is showing up as undefined when being ...
- 25
0
votes
0
answers
18
views
How to mock AsyncIterable paging sub-call from Jest mock?
I'm trying to mock an Azure SDK PagedAsyncIterableIterator, using Jest. The unit test fails on the ".byPage()" method call, with the error TypeError: this.storageManagementClient....
- 738
0
votes
0
answers
69
views
Jest with TypeScript - Import assertions are only supported when the '--module' option is set to 'esnext', 'nodenext', or 'preserve'
I'm trying to use Jest in my Express API with TypeScript. However, every time I try to execute npm run test, Jest complains about the ESM.
I've tried many configurations, but none of then solved the ...
1
vote
1
answer
48
views
TypeError: configSet.processWithEsbuild is not a function when running Jest tests with Angular
I am trying to run my Jest tests for an Angular project, but I'm encountering the following error:
FAIL src/app/app.component.spec.ts
● Test suite failed to run
TypeError: configSet....
-1
votes
0
answers
38
views
Jest Mock Error :- Here test cases are not working fine
So here I have written test cases in jest for my project. When I run all the test cases together some test case fails where same mocks are being shared but when i run together it works fine.
This is ...
-1
votes
1
answer
39
views
Trying to mock all the functions of a JavaScript class with Jest
I am trying to mock a JavaScript service class (AppInsightsService) that I pass in to a tool class (OrderHistoryTool) to use. I don't want to return any data from the mock - I just want to ignore all ...
- 301
1
vote
0
answers
33
views
Cannot find module '@angular/core/testing' from 'node_modules/jest-preset-angular/build/config/setup-jest.js'
Upgrading from angular 12 to angular 16. In the process 100% of my tests seem to be failing. All the errors seem to signify a missing node module. I am not sure what I am missing. Any help is ...
0
votes
0
answers
40
views
How to use path aliases in Jest tests when a test directory is alongside the source directory
I have a project where my Jest ./test directory is at the same level as the ./src/ directory. I've added path aliases to my TypeScript project, but my Jest tests' path alias imports are throwing the ...
- 1,274
0
votes
0
answers
16
views
Jest not able to resolve tsconfig extended from node_modules package
I have a monorepo setup using turborepo, I have picked out my tsconfig and made an npm package out of it that can be extended to multiple apps in my monorepo.
{
"extends": "jc-tsconf/...
3
votes
0
answers
495
views
Jest tests started failing with TypeError: A dynamic import callback was invoked without --experimental-vm-modules after recent React Native upgrade
I've been trying to resolve this test error for a while now with not success. Recently I upgraded React Native from 0.72.3 to 0.74.3 and got the Android application to build and run, however, I can't ...
- 5,576
0
votes
0
answers
23
views
Error with pg in Jest-ts testing : Jest has detected the following 1 open handle potentially keeping Jest from exiting: ● TCPWRAP
I have been facing the problem where my Jest test is not ending gracefully. (I prefer not to use --force-exit).
this is my jest code. FYI the tests passes. This is an integration testing.
import ...
0
votes
0
answers
65
views
Jest errors: Need to call TestBed.initTestEnvironment() first AND zone-testing.js is needed for the fakeAsync() test helper but could not be found
This is an example of a test:
import { ComponentFixture, TestBed } from '@angular/core/testing';
import { FooterComponent } from './footer.component';
describe('FooterComponent', () => {
let ...
- 383
1
vote
1
answer
21
views
TypeScript JSX Syntax Error in Jest Mock for react-native-modal: Operator ‘>’ cannot be applied to types ‘View’ and ‘{ children: React.ReactNode; }’
I’m trying to create a Jest mock for react-native-modal in a React Native project using TypeScript. However, TypeScript doesn’t recognize the return statement as valid JSX. It throws the following ...
- 2,728
0
votes
0
answers
12
views
React Native + Jest + React Native Testing Library errors
I'm having trouble with a proper config for the following setup: React Native + Jest + React Native Testing Library. Trying to follow the docs and similar issues solutions, nothing works as expected ...
- 445
0
votes
0
answers
32
views
Error: Testing Mantine v6 Components with Jest in an Existing CRA App
I'm facing challenges while trying to add tests using Jest to my existing Create React App (CRA) project, which uses Mantine v6 components. I've been following the testing guidelines in the Mantine ...
0
votes
0
answers
17
views
@module-federation/typescript - Federated Types - Conflict with Jest
I'm trying to typing my modules using @module-federation/typescript
So far, is all good, follow the steps I was able to do it.
The problem right now is that when I running my tests I'm having this ...
- 368
-1
votes
1
answer
39
views
Getting error in Component testing - Jest & react-native testing library
Getting error when using the render method to test component
`Trying to detect host component names triggered the following error:
Unexpected token 'export'
There seems to be an issue with your ...
- 37
0
votes
0
answers
39
views
jest.config.ts file not working with react-scripts test
I am new to Jest and struggling to setup in my React TypeScript Web app. I want to keep all my Jest configuration details in a single file jest.config.ts. I keep getting an unknown long list of errors:...
- 373
0
votes
1
answer
26
views
Why are my NestJS Guards not included in Jest code coverage?
I have written unit tests for my Nest Guards, and then run just fine and pass, but when I check my code coverage they are not included in that! You can see in my console output the *.guard.ts files ...
- 33.2k
0
votes
0
answers
19
views
NestJS & Jest: The presence of jest.config.ts causes "strange behavior" during build
I have a Nestjs service inside my monorepo project with the following structure:
/
- package.json
- packages/
- - frontend/
- - backend/
- - backend/package.json
backend is the nestjs service, ...
0
votes
1
answer
49
views
Code coverage not working as expected on Linux and Mac
I have a Next.js project which uses React, MUI and TypeScript and Jest (with RTL) for testing.
I have achieved 100% test coverage on Windows, but when I run the test coverage on a Mac or my Ubuntu CI ...
- 300
0
votes
0
answers
72
views
ts-jest unable to process a file
I am new to jest and am trying to implement unit tests in a sharepoint framework solution. I am using ts-jest to process my typescript files and am currently struggling to get a self built package to ...
- 1
0
votes
0
answers
21
views
Jest has different behavior in watch mode
I'm writing a extension for chrome omnibox. And I'm using jest to write testing, but I found that the behavior of npx jest and npx jest --watchAll are different.
Detailly, npx jest works fine and it ...
- 111
0
votes
1
answer
54
views
Nest can't resolve dependencies of the I18nService
getting error when i try to run test cases
import { Test } from '@nestjs/testing';
import { appConfig } from '../app.config';
import { CommonBotModule } from '../common/common-bot.module';
import { ...
0
votes
0
answers
21
views
Unit test with NestJS, Jest and GraphQL : import module fail
I'm new to TDD and Jest, and trying to test the CRUD routes for my app created with NestJS.
The tricky part is that I use GraphQL and could not find any help online that works, at least for me.
I have ...
- 27
0
votes
1
answer
37
views
Nestjs jest unit test returns this.userModel is not a constructor
I am down to one failed unit test and for the past 3 days I have not been able to pass it. I am getting the followning error in the console related to the jest test:
FAIL src/user/user.service.spec....
1
vote
2
answers
431
views
Ts-jest SyntaxError: Cannot use import statement outside a module
Issue
I'm running into error SyntaxError: Cannot use import statement outside a module for my jest unit tests after switching one of the packages in our dependencies. The package is a hard requirement ...
- 129
0
votes
0
answers
22
views
(Jest/ ts-jest) Mocking exported function is not working
I'm trying to mock a simple exported function in a test with Jest.
The problem is that the mocked function is not being called.
example.ts
export const exampleFn = () => {
return 'example'
}
...
- 11
0
votes
1
answer
92
views
Mocking fetch return response using Jest in Typescript
I have a function that calls fetch() and handles different cases of its response data.
When trying to mock the global fetch function using Jest I am having trouble with the Response type.
I only need ...
1
vote
1
answer
30
views
Jest. The original function is called instead of the mock function
I'm facing an issue with function mocking in Jest, especially when one function calls another within itself. I'm using Jest to test the tools module where testBar calls testBar1. I'm trying to mock ...
- 13
0
votes
0
answers
15
views
Why is Jest plain javascript unit test trying to read NextJS?
I added Jest to make some unit tests of plain javascript classes.
They were working, but I added some more code and now I tried to execute the tests and got this:
● Test suite failed to run
...
- 5,883
0
votes
0
answers
66
views
Jest running failed: Unexpected token 'export'
I'm trying to run my tests using jest and I keep facing this error
Details:
/Users/mamad/repos/New Mindro-ai/mindro-dev/web-client/node_modules/react-markdown/index.js:9
export {Markdown ...
0
votes
1
answer
72
views
Jest in a TypeScript monorepo
I'm working on a TypeScript monorepo and I'm trying to run Jest without the need to run yarn build in order to run yarn test.
If I run the application through tsx it runs perfectly (finding all the ...
- 15.7k
0
votes
0
answers
20
views
How to test ,using jest, an express app built with ts if I have a specific ts compiler config?
any idea how to test express app with this ts config?
I tried jest, but I get errors because of wrong extension, that's .js
However, you have to use .js inside of ts files since module is set to ...
0
votes
1
answer
83
views
Jest Configuration Error: Cannot Use Import Statement Outside a Module in React and TypeScript Project
I'm encountering issues when running Jest in my React and TypeScript project. The errors I'm facing are related to ES module imports.
Here are the errors i get:
C:\projects\my-project\web\node_modules\...
0
votes
0
answers
48
views
Nx react testing with jest
Im trying to test an app project inside a nx repo that references components in a lib project. But it seems like it fails when loading the external lib, what am i missing. I can run the test just fine ...
- 138
0
votes
0
answers
74
views
How can I Test 'react-slick' library with Jest?
I have been trying to achieve 100% coverage in my Slider component, but I need to test the branches of these functions:
const nextSlide = () => {
if (sliderRef.current) sliderRef.current?....
- 1
1
vote
0
answers
35
views
TypeError: Cannot read property 'explorerPage' of undefined
I am upgrading jest from version 23 to 29. My project used to work fine before the upgrade, suddenly started observing this issue. I use Typescript as a language.
TestPageDefs Module looks like below:
...
- 31
0
votes
0
answers
57
views
Visual Studio Code debugger stoped working after migration to esm-only package ussage
Issue
My visual studio code debugger stoped working as soon as we moved our code use latest esm-only packages. After we made the changes in .swcrc and typescript config the debugger throws the error ...
- 647
0
votes
0
answers
11
views
How to make ts-jest supports static initialization blocks syntax?
Test suite failed while the code includes static initialization blocks.
class Model {
static {
this.schema.index( {} );
}
}
● Test suite failed to run
TypeError: Cannot read ...
- 1,050
0
votes
1
answer
84
views
ts-jest nestjs Cannot read properties of undefined of an enum
I'm creating an application using NestJS and using ts-jest for e2e testing.
This is my code repository:
https://github.com/redplane/jest-issue
I have one controller with the following logic:
@...
- 3,121
-1
votes
1
answer
37
views
Unable to get coverage for callback functions passed from argument in jest
My use case layer in nestjs look like below
export class AddModuleUseCases {
constructor(
private readonly logger: ILogger,
private readonly i18n: I18nService,
private readonly ...
- 187
0
votes
1
answer
22
views
Accessing imported modules in jest
I am using this format to import modules in a ts project.
import { Configs } from '@configs'
Based on using this setting in tsconfig.json
"paths": {
"@configs": ["...
- 105