[API] Enable code coverage

Enable code coverage reporting from npm-executed tests.

karma.conf.js

@@ -34,6 +34,7 @@ module.exports = function(config) {
         // List of files / patterns to load in the browser.
         // By default, files are also included in a script tag.
         files: [
+            {pattern: 'src/**/*.js', included: false},
             {pattern: 'example/**/*.js', included: false},
             {pattern: 'platform/**/*.js', included: false},
             {pattern: 'warp/**/*.js', included: false},
@@ -47,12 +48,14 @@ module.exports = function(config) {
 
         // Preprocess matching files before serving them to the browser.
         // https://npmjs.org/browse/keyword/karma-preprocessor
-        preprocessors: {},
+        preprocessors: {
+            '**/src/**/!(*Spec).js': [ 'coverage' ]
+        },
 
         // Test results reporter to use
         // Possible values: 'dots', 'progress'
         // Available reporters: https://npmjs.org/browse/keyword/karma-reporter
-        reporters: ['progress'],
+        reporters: ['progress', 'coverage'],
 
         // Web server port.
         port: 9876,
@@ -71,6 +74,11 @@ module.exports = function(config) {
             'Chrome'
         ],
 
+        // Code coverage reporting.
+        coverageReporter: {
+            dir: "target/coverage"
+        },
+
         // Continuous Integration mode.
         // If true, Karma captures browsers, runs the tests and exits.
         singleRun: false

package.json

@@ -7,23 +7,24 @@
     "minimist": "^1.1.1"
   },
   "devDependencies": {
+    "canvas": "^1.2.7",
+    "glob": ">= 3.0.0",
     "jasmine-core": "^2.3.0",
     "jsdoc": "^3.3.2",
     "jshint": "^2.7.0",
     "karma": "^0.12.31",
     "karma-chrome-launcher": "^0.1.8",
     "karma-cli": "0.0.4",
+    "karma-coverage": "^0.5.3",
     "karma-jasmine": "^0.1.5",
     "karma-phantomjs-launcher": "^0.1.4",
     "karma-requirejs": "^0.2.2",
-    "requirejs": "^2.1.17",
+    "markdown-toc": "^0.11.7",
     "marked": "^0.3.5",
-    "glob": ">= 3.0.0",
-    "split": "^1.0.0",
     "mkdirp": "^0.5.1",
     "nomnoml": "^0.0.3",
-    "canvas": "^1.2.7",
-    "markdown-toc": "^0.11.7"
+    "requirejs": "^2.1.17",
+    "split": "^1.0.0"
   },
   "scripts": {
     "start": "node app.js",