fix: handle non existing mochaConfig

Author: dignifiedquire

karma.conf.js

@@ -9,6 +9,14 @@ module.exports = function (config) {
 
     browsers: process.env.TRAVIS ? ['Firefox'] : ['Chrome'],
 
-    autoWatch: true
+    autoWatch: true,
+
+    plugins: [
+      require.resolve('./'),
+      'karma-chai',
+      'karma-sinon',
+      'karma-firefox-launcher',
+      'karma-chrome-launcher'
+    ]
   })
 }

lib/index.js

@@ -8,7 +8,7 @@ var initMocha = function (files, mochaConfig) {
   var mochaPath = path.dirname(require.resolve('mocha'))
   files.unshift(createPattern(path.join(__dirname, 'adapter.js')))
 
-  if (mochaConfig.require && mochaConfig.require.map) {
+  if (mochaConfig && mochaConfig.require && mochaConfig.require.map) {
     mochaConfig.require.map(function (requirePath) {
       return files.unshift(createPattern(requirePath))
     })

package.json

@@ -34,12 +34,11 @@
     "grunt-eslint": "^18.0.0",
     "grunt-karma": "2.x",
     "grunt-npm": "~0.0.2",
-    "karma": "1.x || ^0.13.15",
-    "karma-chai": "1.x || ~0.1.0",
-    "karma-chrome-launcher": "1.x || ^0.2.1",
-    "karma-firefox-launcher": "1.x || ~0.1.0",
-    "karma-mocha": "1.x || ~0.2.1",
-    "karma-sinon": "1.x || ~1.0.3",
+    "karma": "^1.0.0",
+    "karma-chai": "^0.1.0",
+    "karma-chrome-launcher": "^1.0.0",
+    "karma-firefox-launcher": "^1.0.0",
+    "karma-sinon": "^1.0.3",
     "load-grunt-tasks": "^3.2.0",
     "mocha": "^2.4.5",
     "shared-karma-files": "git://github.com/karma-runner/shared-karma-files.git#82ae8d02",