Easily generate "custom" error objects with addition properties which can be stringfied with JSON.stringify

Run the supplied function exactly one time (once)

Safely extract the XHR response from your XHR instance.

Normalize XHR status code/text across various of environments

Expect-like assertions that works seamlessly in node and browsers

Assign event listeners through a `on<event>` methods. Great for stubbing DOM API's

Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use ca

Classic, reliable, trusted test framework for Node.js and the browser

Automatically install pre-commit hooks for your npm modules.