Testing JavaScript

About Testing JavaScript

Testing JavaScript is a video course by Kent C. Dodds that teaches a four-layer method for testing JavaScript applications: static analysis (ESLint, TypeScript, Prettier), unit testing, integration testing, and end-to-end testing. It applies this method using a React application as the primary example, while framing the approach as applicable to other frameworks such as Angular, Vue, and Backbone.

The course is organized into modules covering topics including how testing frameworks and assertion libraries work internally, JavaScript mocking fundamentals (stubs, mocks, and test doubles), static analysis tooling, cross-framework component testing with DOM Testing Library (demonstrated across 11 frameworks), and configuring Jest for real-world applications, including handling Webpack loaders, dynamic imports, and custom module resolution.

Each module includes video lessons, code, and transcripts, with stated lengths ranging from about 8 minutes to over 1 hour of material. The course is aimed at JavaScript developers who want a structured approach to automated testing rather than manual, ad hoc verification of their applications.

Key features

• Four-layer testing method: static analysis, unit, integration, and e2e testing
• Video courses on building your own testing framework and assertion library
• JavaScript mocking fundamentals including stubs, mocks, and test doubles
• DOM Testing Library usage across 11 different JavaScript frameworks
• Jest configuration for handling Webpack loaders, dynamic imports, and custom module resolution
• Testing techniques applicable across React, Angular, Vue, and other frameworks

Frequently asked questions