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#node-coveralls
[](https://travis-ci.org/cainus/node-coveralls)
[](https://coveralls.io/r/cainus/node-coveralls?branch=master)
[](https://www.codeship.io/projects/5622)
[Coveralls.io](https://coveralls.io/) support for node.js. Get the great coverage reporting of coveralls.io and add a cool coverage button ( like the one above ) to your README.
Supported CI services: [travis-ci](https://travis-ci.org/), [codeship](https://www.codeship.io/), [circle-ci](https://circleci.com/), [jenkins](http://jenkins-ci.org/)
##Installation:
Add the latest version of `coveralls` to your package.json:
```
npm install coveralls --save
```
If you're using mocha, add `mocha-lcov-reporter` to your package.json:
```
npm install mocha-lcov-reporter --save
```
##Usage:
This script ( `bin/coveralls.js` ) can take standard input from any tool that emits the lcov data format (including [mocha](http://visionmedia.github.com/mocha/)'s [LCov reporter](https://npmjs.org/package/mocha-lcov-reporter)) and send it to coveralls.io to report your code coverage there.
Once your app is instrumented for coverage, and building, you need to pipe the lcov output to `./node_modules/coveralls/bin/coveralls.js`.
This library currently supports [travis-ci](https://travis-ci.org/) with no extra effort beyond that, but if
you're using a different build system, there are a few environment variables that are necessary:
* COVERALLS_SERVICE_NAME (the name of your build system)
* COVERALLS_REPO_TOKEN (the secret repo token from coveralls.io)
There are optional environment variables for other build systems as well:
* COVERALLS_SERVICE_JOB_ID (an id that uniquely identifies the build job)
* COVERALLS_RUN_AT (a date string for the time that the job ran. RFC 3339 dates work. This defaults to your
build system's date/time if you don't set it.)
### [Mocha](http://visionmedia.github.io/mocha/) + [Blanket.js](https://github.com/alex-seville/blanket)
- Install [blanket.js](http://blanketjs.org/)
- Configure blanket according to [docs](https://github.com/alex-seville/blanket/blob/master/docs/getting_started_node.md).
- Run your tests with a command like this:
```sh
NODE_ENV=test YOURPACKAGE_COVERAGE=1 ./node_modules/.bin/mocha \
--require blanket \
--reporter mocha-lcov-reporter | ./node_modules/coveralls/bin/coveralls.js
```
### [Mocha](http://visionmedia.github.io/mocha/) + [JSCoverage](https://github.com/fishbar/jscoverage)
Instrumenting your app for coverage is probably harder than it needs to be (read [here](http://www.seejohncode.com/2012/03/13/setting-up-mocha-jscoverage/) or [here](http://tjholowaychuk.com/post/18175682663/mocha-test-coverage)), but that's also a necessary step.
In mocha, if you've got your code instrumented for coverage, the command for a travis build would look something like this:
```sh
YOURPACKAGE_COVERAGE=1 ./node_modules/.bin/mocha test -R mocha-lcov-reporter | ./node_modules/coveralls/bin/coveralls.js
```
Check out an example [Makefile](https://github.com/cainus/urlgrey/blob/master/Makefile) from one of my projects for an example, especially the test-coveralls build target. Note: Travis runs `npm test`, so whatever target you create in your Makefile must be the target that `npm test` runs (This is set in package.json's 'scripts' property).
### [Istanbul](https://github.com/gotwarlost/istanbul)
```sh
istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage
```
### [Nodeunit](https://github.com/caolan/nodeunit) + [JSCoverage](https://github.com/fishbar/jscoverage)
Depend on nodeunit, jscoverage and coveralls:
```sh
npm install nodeunit jscoverage coveralls --save-dev
```
Add a coveralls script to "scripts" in your `package.json`:
```javascript
"scripts": {
"test": "nodeunit test",
"coveralls": "jscoverage lib && YOURPACKAGE_COVERAGE=1 nodeunit --reporter=lcov test | coveralls"
}
```
Ensure your app requires instrumented code when `process.env.YOURPACKAGE_COVERAGE` variable is defined.
Run your tests with a command like this:
```sh
npm run coveralls
```
For detailed instructions on requiring instrumented code, running on Travis and submitting to coveralls [see this guide](https://github.com/alanshaw/nodeunit-lcov-coveralls-example).
## Running locally
If you're running locally, you must have a `.coveralls.yml` file, as documented in [their documentation](https://coveralls.io/docs/ruby), with your `repo_token` in it; or, you must provide a `COVERALLS_REPO_TOKEN` environment-variable on the command-line.
If you want to send commit data to coveralls, you can set the `COVERALLS_GIT_COMMIT` environment-variable to the commit hash you wish to reference. If you don't want to use a hash, you can set it to `HEAD` to supply coveralls with the latest commit data. This requires git to be installed and executable on the current PATH.
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