Fix duplicate components being injected into data URI and add tests for index.js

test/karma.conf.js

@@ -52,6 +52,7 @@ module.exports = function(config) {
 
     // list of files / patterns to load in the browser
     files: [
+      'index.js',
       'src/scripts/**/*.js',
       'test/spec/**/*.js'
     ],
@@ -62,6 +63,7 @@ module.exports = function(config) {
     // preprocess matching files before serving them to the browser
     // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
     preprocessors: {
+      'index.js': ['browserify'],
       'src/scripts/**/*.js': ['browserify'],
       'test/spec/**/*.js': ['browserify']
     },