karma-coffee-coverage

A set of plugins for the Karma Test Runner to support coffee-coverage

Preprocessor

Use the coffee-coverage preprocessor in place of karma-coffee-preprocessor to compile coffee to js that will also be instrumented for karma-coverage to use.

Usage

In your karma.conf.*

// instrument `coffee` files on the fly
preprocessors: [
    '**/*.coffee': ['coffee-coverage']
],

// configure the processor plugin to use `istanbul` style
coffeeCoverage: {
    preprocessor: {
        instrumentor: 'istanbul'
    }
}

Options

You can pass anything that you would pass to the coffee-coverage constructor. Most notably the instrumentor option.

Framework Plugin

What problem is this solving??

Say you have foo.coffee and bar.coffee as client side files. You only have written tests for foo.coffee and, therefore, have not included bar.coffee in your karma config's files list. If you cover, say, 80% of foo.coffee in your tests, your report will mirror that. However, you haven't tested bar.coffee at all! A more realistic report would be to say you have covered 80% of foo.coffee, and 0% of bar.coffee. Therefore, your overall coverage report should say 40%. How to fix that? Use this plugin to create an initial empty coverage object that contains empty entries for all the sources you would like to report on (usually your entire client side source).

What the plugin will do is run coffee-coverage on basePath, and generate a javascript file containing all the coverage intialization code for that directory. You can then include this file in your config files property, and will thus include the zero counts in any reports your generate. karma-coverage will merge this with any actual counts that are covered during the tests.

This is useful in conjunction with browserify-coffee-coverage

Usage

In your karma.conf.*

// add `karma-coffee-coverage` framework plugin
frameworks: ['coffee-coverage'],

// configure the framework plugin
coffeeCoverage: {
    framework: {
        initAllSources: true,
        sourcesBasePath: 'assets',
        dest: 'build-test/coverage-init.js',
        instrumentor: 'istanbul'
    }
},

// Then ensure that `dest` is included in our `files`
files: ['build-test/coverage-init.js', '**/*Test.js']

Options

You can pass anything that you would pass to the coffee-coverage constructor, as well as these options.

coffeeCoverage.framework.initAllSources

This needs to be true for the plugin to run.

coffeeCoverage.framework.sourcesBasePath

The root directory which you would like to generate initialization coverage for.

coffeeCoverage.framework.dest

The .js file destination to write out the initialization javascript. Include this in your karma files config.

NOTES

Should be used in conjunction with a coverage reporter that supports istanbul or jscoverage, such as karma-coverage.

Can use both framework and preprocessor plugins together.