Add code coverage

Author: ndhoule

.gitignore

@@ -1,2 +1,2 @@
-components
-build
+coverage
+node_modules

circle.yml

@@ -1,6 +1,8 @@
 machine:
   node:
     version: 4
+  environment:
+    COVERAGE_DIR: $CIRCLE_ARTIFACTS/coverage
 
 test:
   override:

karma.conf.ci.js

@@ -77,5 +77,13 @@ module.exports = {
 
   sauceLabs: {
     testName: require('./package.json').name
+  },
+
+  coverageReporter: {
+    reporters: [
+      { type: 'text' },
+      { type: 'lcov' }
+    ],
+    dir: process.env.COVERAGE_DIR || 'coverage'
   }
 };

karma.conf.js

@@ -10,14 +10,33 @@ module.exports = function(config) {
 
     frameworks: ['browserify', 'mocha'],
 
-    reporters: ['spec'],
+    reporters: ['spec', 'coverage'],
 
     preprocessors: {
+      'index.js': 'browserify',
       'test/**/*.js': 'browserify'
     },
 
     browserify: {
-      debug: true
+      debug: true,
+      transform: [
+        [
+          'browserify-istanbul',
+          {
+            instrumenterConfig: {
+              embedSource: true
+            }
+          }
+        ]
+      ]
+    },
+
+    coverageReporter: {
+      reporters: [
+        { type: 'text' },
+        { type: 'html' },
+        { type: 'json' }
+      ]
     }
   };
 

package.json

@@ -21,10 +21,13 @@
   "devDependencies": {
     "@segment/eslint-config": "^3.0.0",
     "browserify": "^13.0.0",
+    "browserify-istanbul": "^2.0.0",
     "eslint": "^2.9.0",
+    "istanbul": "^0.4.3",
     "karma": "^0.13.22",
     "karma-browserify": "^5.0.4",
     "karma-chrome-launcher": "^1.0.1",
+    "karma-coverage": "^1.0.0",
     "karma-mocha": "^1.0.1",
     "karma-phantomjs-launcher": "^1.0.0",
     "karma-sauce-launcher": "^1.0.0",