About Mocha
Mocha is a JavaScript test framework that runs on Node.js and in the browser. It makes asynchronous tests straightforward, and it maps uncaught errors to the test that caused them.
What it does
Mocha finds and runs your test files one test after another. It supports hooks that run before and after tests, and it can apply timeouts and retry failing tests. You choose the assertion library and reporter you want, so Mocha fits into many different test setups. Its docs cover browser usage, the command line and editor plugins.
Key features
- Hooks that run before and after tests
- Clear diffs when an assertion fails
- Parallel mode for faster test runs
- Configurable timeouts and retries
- Reporters for different output formats
Who it's for
Mocha suits developers who want a flexible, mature test runner for Node.js back-end code or browser code. It is also a good fit for teams that want to pick their own assertion library and reporting tools.
Pricing and good to know
Mocha is MIT licensed and free to use. It is a test runner only, so you add other packages for assertions, mocks or spies. The project accepts sponsors and backers, and the site asks companies to consider supporting it.
Highlights
- Hooks that run before and after tests
- Clear diffs when an assertion fails
- Parallel mode for faster test runs
- Configurable timeouts and retries
- Reporters for different output formats
