I need to assert that an array does not contain any of the elements of a second array. In other words, I need to assert that two arrays are disjoint. I have tri
The title pretty much explains what I'm facing. I'm trying to test a React component that has some state, and I attempt to provide my store to the component in
I am trying to test an Angular app with testing-library/angular@11 and jest@27.4.4 which uses custom-elements quite heavily. Unfortunately I am not quite sure i
My functions in Calculator class is private and I can't test in this way, describe('calculate', function() { it('add', function() { let result = Calculat
I am updating a project from jest version 26 to jest version 27. As part of the update I had to switch from assertions on setTimeout to assertions on jest.spyOn
Here is the code. I'm getting error TypeError: setSystemTime is not available when not using modern timers when I run the test. I have "@jest/fake-timers": "^27
I have this selector in my component whose default state is '' (empty) string but when change event is fired user can select any one of the three values that is
I have used JavaScript to created a simple web application to measure how much time I spend on different projects. I want to test the code with Jest and this wo
Edit: My Jest was not setup on my Angular project properly. so if you are experience this then your Jest was not setup properly, if anyone has a good guide on s
When I follow the instructions found here and add the import reference as they specify: import "@ui5/webcomponents/dist/Button"; the application works fine a
I've got a controller configured in NestJS and I want to check that the appropriate guards are set - does anyone have an example of how it could be done? This
i've got a problem. I'm trying to test material ui's datePicker (https://mui.com/api/date-picker/) with Jest and Enzyme. I've searched alot but couldnt find any
The Jest docs do not demonstrate a way of asserting that no exception was thrown, only that one was. expect(() => ...error...).toThrow(error) How do I asse
I have Jest installed on my machine and typing jest from terminal results in tests from parent folers also getting executed. I want to run tests only from the c
I have created my models using the sequelize-auto package and used them in my controllers const sequelize = require('../database/db'); var models = require("../
I'd like to change the implementation of a mocked dependency on a per single test basis by extending the default mock's behaviour and reverting it back to the o
I'm trying to spy on a function inside a function component using react testing library. I wanted to test whether handleClick function has been called whenever
I have some components that are rendering another component (FetchNextPageButton) that is already tested in isolation, like these ones: const News = () => (
I'm creating unit testing of Swiper using Jest. Here is my code: https://codesandbox.io/s/swiper-default-react-forked-v0dnz?file=/src/App.test.jsx ● Test
I am doing unit tests on a react app that is using relay as a graphql client when testing , i get mocked data with like this : title: '<mock-value-f