How to use the unit testing pattern Arrange Act Assert, and why the three As are so useful. Example of how to use arrange-act-assert with a JS function.
Solution for testing that images have rendered in React using Jest. And how to test an image alt and src in jest using React. Including example code.
How to mock a React component in a jest unit test. Example of how to mock a default or named component using React Testing Library.
Examples of how to use within in Jest and React Testing Library to target a specific section of the component. Restrict Jest queries to a particular element. Inside the context of a DOM node.
Solution for error 'RangeError: timeZone is not supported.' when unit testing Intl API. Caused by Node not supporting time zones
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.
Struggling to mock the Date in Jest using CRA? Need consistant global Date testing for React? This article provides the solution.