grunt-istanbul

JavaScript codecoverage tool for Grunt

Getting Started

This plugin requires Grunt ~0.4.1

Install this grunt plugin next to your project's Gruntfile.js with:

npm install grunt-istanbul

Then add this line to your project's

Gruntfile.js

grunt.loadNpmTasks('grunt-istanbul');

Documentation

This grunt plugin uses Istanbul to perform the code coverage tasks. It provides the following grunt tasks: *

instrument

reloadTasks

storeCoverage

makeReport

To use this grunt-istanbul plugin, register a grunt task to run the following:

1. Instrument your source code
2. Run your test suite against your instrumented source code
3. Store your coverage results
4. Make the report

For step 2, an environment variable can be used to determine which path to use for loading the source code to run the tests against. For example, when you normally run your tests you want them to point directly at your source code. But when you run your instanbul code coverage task you want your tests to point at your instrumented source code. The

grunt-env

grunt-env

grunt-mocha-test

// in Gruntfile.js
module.exports = function (grunt) {

  grunt.initConfig({
    env: {
      coverage: {
        APP_DIR_FOR_CODE_COVERAGE: '../test/coverage/instrument/app/'
      }
    },
    instrument: {
      files: 'app/.js',
      options: {
        lazy: true,
        basePath: 'test/coverage/instrument/'
      }
    },
    mochaTest: {
      options: {
        reporter: 'spec'
      },
      src: ['test/.js']
    },
    storeCoverage: {
      options: {
        dir: 'test/coverage/reports'
      }
    },
    makeReport: {
      src: 'test/coverage/reports/*/.json',
      options: {
        type: 'lcov',
        dir: 'test/coverage/reports',
        print: 'detail'
      }
    }
  });
  grunt.registerTask('coverage', ['env:coverage', 'instrument', 'mochaTest',
    'storeCoverage', 'makeReport']);
};

// require_helper.js
module.exports = function (path) {
  return require((process.env.APP_DIR_FOR_CODE_COVERAGE || '../app/') + path);
};

// using requireHelper in a test
var requireHelper = require('../require_helper');
var formValidator = requireHelper('form_validator');

You can also pass an

instrumenter

options

// in Gruntfile.js
module.exports = function (grunt) {
 var isparta = require('isparta');
  grunt.initConfig({
    instrument: {
      files: 'app/*.es6',
      options: {
        lazy: true,
        basePath: 'test/coverage/instrument/'
        babel: {ignore: false, experimental: true, extensions: ['.es6']},
        instrumenter: isparta.Instrumenter
      }
    }
  });
};

If you want to specify a current working directory, you can specify a path the cwd

options

// in Gruntfile.js
module.exports = function (grunt) {
 var isparta = require('isparta');
  grunt.initConfig({
    instrument: {
      files: '**/*.es6',
      options: {
        cwd: 'app/'
        lazy: true,
        basePath: 'test/coverage/instrument/'
        babel: {ignore: false, experimental: true, extensions: ['.es6']}
      }
    }
  });
};

If you wan to insturment multiple locations, you specify multiple task targets:

// in Gruntfile.js
module.exports = function (grunt) {

  grunt.initConfig({
    env: {
      coverage: {
        APP_DIR_FOR_CODE_COVERAGE: '../test/coverage/instrument/app/'
      }
    },
    instrument: {
      api: {
        files: 'app/.js',
        options: {
          basePath: 'test/coverage/instrument/'
        }
      },
      web: {
        files: 'web/.js',
        options: {
          basePath: 'test/coverage/instrument/'
        }
      }
    },
    mochaTest: {
      options: {
        reporter: 'spec'
      },
      src: ['test/.js']
    },
    storeCoverage: {
      options: {
        dir: 'test/coverage/reports'
      }
    },
    makeReport: {
      src: 'test/coverage/reports/**/.json',
      options: {
        type: 'lcov',
        dir: 'test/coverage/reports',
        print: 'detail'
      }
    }
  });
  grunt.registerTask('coverage', function(arg) {
    var insturment = arg ? 'insturment:' + arg : 'insturment';
grunt.task.run(['env:coverage', instrument, 'mochaTest',
  'storeCoverage', 'makeReport']);
  });

# coverage with api and web insturmentation
$ grunt coverage

coverage with api insturmentation
$ grunt coverage:api
coverage with web insturmentation
$ grunt coverage:web

By default only files that have coverage are stored. When the 'include-all-sources' option is set to true it will show all instrumented files even if their coverage percentage is 0. To see all instrumented files you can init the

storeCoverage

javascript
grunt.initConfig({
  storeCoverage: {
    options: {
      dir: 'test/coverage/reports',
      'include-all-sources': true
    }
  }
});

Also, checkout the example Gruntfile.js in this repo (note that you do not need to implement the

reloadTasks

For information about the configuration options use the command line

istanbul help config

more examples

• Testing and Code Coverage With Node.js Apps
  • gregjopa/express-app-testing-demo

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using grunt.

Release History

(Nothing yet)

License

Copyright (c) 2014 taichi Licensed under the MIT license.