jestjs Articles

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jestjs

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Testing Modal props with enzyme and jest

I have a modal component that is shared all through out the application. I’m trying … Read more Testing Modal props with enzyme and jest

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React jest and MSAL getting BrowserAuthError : crypto

I’m trying to test a few components that are using MSAL for authentication. Thus far, … Read more React jest and MSAL getting BrowserAuthError : crypto

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How to test signin component with jest and react testing library

I try to create an integrated test for a signin component but im facing some … Read more How to test signin component with jest and react testing library

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Quasar jest test q-input -> q-btn -> q-input (readonly)

I am using quasar 3.1.4 and I would like to set the value of q-input, … Read more Quasar jest test q-input -> q-btn -> q-input (readonly)

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React unit test useMemo hook using jest

I have a test case to mock for a function handleDataFetch in a component that … Read more React unit test useMemo hook using jest

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Jest: trouble with async assertion and whether a function was called

I am trying to assert that a function is called. Unfortunately it is passing unexpectedly … Read more Jest: trouble with async assertion and whether a function was called

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jest fails to spy if object is destructed

I am noticing weird behavior with jest and object destructuring I have three files main.js … Read more jest fails to spy if object is destructed

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What to test: JavaScript or TypeScript?

I`m starting to work with TypeScript and when I was coding in pure JS, I … Read more What to test: JavaScript or TypeScript?

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What to test: JavaScript or TypeScript?

I`m starting to work with TypeScript and when I was coding in pure JS, I … Read more What to test: JavaScript or TypeScript?

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Testing React app with Jest, using Vite as a module Bundler; import.meta error

i am testing a React-Typescript application with Jest; my application uses Vite as a module … Read more Testing React app with Jest, using Vite as a module Bundler; import.meta error

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Some Jest test cases in react failing

I am writing my codes towards passing some predefined test cases and some test cases … Read more Some Jest test cases in react failing

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Absolute path regex in jest.config.js

I would like to match absolute paths with regex in my jest.config.js same way as … Read more Absolute path regex in jest.config.js

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Jest Mocks – changing the property of a mock property / function on mocks

Say i want to keep seperation between simple modules in a practice tech test (boris-bikes), … Read more Jest Mocks – changing the property of a mock property / function on mocks

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Expected one assertion to be called but received zero assertion calls. Why?

I’m writing a rejectOnTimeout() function that should return a rejected promise with a timeout_error value … Read more Expected one assertion to be called but received zero assertion calls. Why?