chore(tests): add debug mode for Karma tests

Author: seriema

CONTRIBUTING.md

@@ -54,7 +54,7 @@ See [.jshintrc](.jshintrc) for the [JSHint](http://jshint.com) conventions (use
 
 Run `grunt test` in-between commits to check JS style and the code is working.
 
-Always run `grunt` before a commit as it runs `grunt test` and builds the distributions files.
+Always run `grunt` before a commit as it runs `grunt test` and builds the distributions files. Use `npm run debug` to run Karma tests in debug mode using Chrome.
 
 Never commit if `grunt` gives an error!
 

karma.conf.js

@@ -2,6 +2,14 @@
 // http://karma-runner.github.io/0.10/config/configuration-file.html
 
 module.exports = function(config) {
+	var sourcePreprocessors = ['coverage'];
+	function isDebug(argument) {
+		return argument === '--debug';
+	}
+	if (process.argv.some(isDebug)) {
+		sourcePreprocessors = [];
+	}
+
 	config.set({
 		// base path, that will be used to resolve files and exclude
 		basePath: '',
@@ -16,7 +24,7 @@ module.exports = function(config) {
 			// source files, that you wanna generate coverage for
 			// do not include tests or libraries
 			// (these files will be instrumented by Istanbul)
-			'app/scripts/**/*.js': ['coverage']
+			'app/scripts/**/*.js': sourcePreprocessors
 		},
 
 		// list of files / patterns to load in the browser

package.json

@@ -45,6 +45,7 @@
   },
   "scripts": {
     "postinstall": "bower install",
-    "test": "grunt test"
+    "test": "grunt test",
+    "debug": "./node_modules/.bin/karma start karma.conf.js --browsers=Chrome --debug --autoWatch=true"
   }
 }