JavaScript test coverage made simple.
How Istanbul works
Istanbul instruments your ES5 and ES2015+ JavaScript code with line counters,so that you can track how well your unit-tests exercise your codebase.
Thenyc command-line-client for Istanbulworks well with most JavaScript testing frameworks:tap,mocha,AVA,etc.
#Features
- First class support of ES6/ES2015+ usingbabel-plugin-istanbul.
- A collection of reporters, providing both terminal and HTML output:
- Support for the most popular JavaScript testing frameworks (see ourtutorials).
- Support for instrumenting subprocesses, using the nyc command-line-interface.
Quick Start
Adding coverage to your mocha tests could not be easier
$ npm install --save-dev nyc
Now, simply place the commandnyc in front of your existing test command, for example:
{"scripts": {"test":"nyc mocha" }}