Questions tagged [jestjs]
Jest is a JavaScript unit testing framework made by Facebook based on Jasmine and provides automated mock creation and a jsdom environment. It's often used for testing React components.
jestjs
23,090
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mocking createAsyncThunk exhibits odd behavior
I am trying to mock createAsyncThunk from reduxjs/toolkit as follows:
// mock.ts file
import { createAction } from "@reduxjs/toolkit";
export const mockedToolkit: unknown = {
...jest....
- 775
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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
-1
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Jest react test : API call failed TypeError: Cannot read properties of undefined (reading 'json')
I am going to test the components below through the jest and react test library.
I want to test if the API is called normally when I press the button, So I made the API calling part mock.
However, ...
- 81
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How can I mock prompt-sync module using jest
I have this method promptPlayer in the class Player which job is to return to the player the index of an empty slot. But inside the method I am running prompt from the prompt-sync module of JS. Cant ...
- 449
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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 ...
- 33k
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Nest can't resolve dependencies of the FollowService Please make sure RedisService at index [2] is available in the RootTestModule context. how to fix
FAIL follow/follow.resolver.spec.ts ● FollowResolver › should be
defined
Nest can't resolve dependencies of the FollowService (aService, bService, ?). Please make sure that the argument
RedisService ...
1
vote
1
answer
28
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Jest error: Jest encountered an unexpected token - query-string import
I'm getting the following:
babel.config.json:
{
"presets": [
["@babel/preset-env", { "targets": { "esmodules": true } }],
["@babel/preset-react&...
- 8,585
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How to mock my util DynamoDB GetItemCommand implementation?
I've got code that uses GetItemCommand to get data from my DynamoDb instance, however I'm not entirely sure how I go about testing my function that uses it.
I don't want to test the GetItemCommand ...
- 6,074
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How to write test cases for file input using jest?
I am trying to write test cases for input type file but I am getting empty file like this e.g. File {}
const PortNumberStep1 = ({
state,
phoneTypeData,
phoneNumberProviderData,
getValues,
...
-2
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What error is this: "Jest encountered an unexpected token"? It came from "isPortReachable" import of my code to be tested
Im trying to do Jest testing for all my domain/service/business logic of my web app.
One of the import was isPortReachable, and Conf, but apparently every file with this import would fail the test ...
- 7
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Need to know jest dom setup in plain vanilla javascript
i created an todo app in vanilla javascript now i needed to test that using jest but the thing jest-environment is not working on that. i need proper procedure to setup get done
package.json
{
"...
- 34
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14
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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, ...
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How to change the value of a MUI DatePicker or TimePicker in Jest/react-testing-library?
I have a component that uses the Material UI datepicker and timepicker.
function MyComponent() {
const [dateFilter, setDateFilter] = useState(moment());
const [timeFilter, setTimeFilter] = ...
- 1
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1
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What is "Argument of type <mock parameters> is not assignable to parameter of type 'never'" in Jest?
I took a bunch of examples online and ChatGPT code to do my testing. I ended up with some red squiggly lines under the parameters mockResolvedValue with the error:
Argument of type '{ email: string; }'...
- 7
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Unable to mock JSEncrypt 3rd party library in jest
encryptPassword.js
import { JSEncrypt } from 'jsencrypt';
export const encryptPassword = (pwd, rsaPublicKey) => {
let retVal = pwd;
try {
const encrypt = new JSEncrypt();
encrypt....
- 11