Testing

Jest Reference Error: Cannot Access ‘’ Before Initialization

This problem is only fixable by changing the location of import and jest.Mock. It creates the problem, because when we import depA and bring it to our module’s runtime, it already read all the…

Why You Should Automate Web UI Testing

Automated vs. Manual Web UI Testing, and How to Automate Web UI Testing with Less Boilerplate Code

Better Unit Testing in Visual Studio Code with Jest

Use The Jest Extension to Dramatically Improve Your Testing Flow

Mock Your Hooks to Make Testing Simpler

Mocking with Jest can have a weird learning curve. Let's see how to mock those hooks.

Jest: How to Update Snapshot Tests

How to Work with Input Fields in Cypress

Improve Your End to End Tests with Cypress Intercept

Learn how to capture network calls for stubbing, assertions, and more.

Storybook Snapshot Testing

Automatic Jest Snapshot Testing with Storybook Stories

Mocking imported constants/methods in JavaScript with Jest

Simulate Browser Interactions with Testing Library's UserEvent

A guide to Testing Library's UserEvent API

Interaction Testing with React Testing Library

A window into React component testing

Creating Axios mock requests in Jest

How to create your own reusable axios mock request function for Jest.

Unit Testing of AWS Lambda Functions (Node.js) using Mocha and Chai

Unit Testing Node.js + Mongoose Using Jest

The Practical Guide to React Testing Library with TypeScript

Testing local storage with testing library

How to test changes to the local storage on synchronous cases and asynchronous ones using the testing library.

Jest Spies and Mocks in Explained via Examples

Make your JavaScript tests deeper, leaner, and faster with these two Jest methods