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Category: Jest

Unit Testing Localizations in React App. Solution for Mocking Intl API

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Solution for error 'RangeError: timeZone is not supported.' when unit testing Intl API. Caused by Node not supporting time zones

Check React Component Props are Passed to Child in Jest Unit Test

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How to unit test a React parent component logic, and check that a child component is passed the correct props. Test if a component is called with expected argument using React Testing Library.

How to Mock the Date in Jest Consistently

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Struggling to mock the Date in Jest using CRA? Need consistant global Date testing for React? This article provides the solution.

React Jest Tests Failing Using Lottie.js Solved

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TypeError: Cannot set property 'fillStyle' of null when using lottie-react in Jest testing solved.

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