test(reporter): Add mocha test

 Add a test of the karma-mocha-reporter. Testing that it outputs
 correctly.

package.json

@@ -316,6 +316,7 @@
     "json3": "^3.3.2",
     "karma-browserify": "^5.0.1",
     "karma-browserstack-launcher": "^0.1.10",
+    "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "*",
     "karma-coffee-preprocessor": "*",
     "karma-commonjs": "*",
@@ -327,6 +328,7 @@
     "karma-junit-reporter": "*",
     "karma-live-preprocessor": "*",
     "karma-mocha": "0.2.1",
+    "karma-mocha-reporter": "^1.2.0",
     "karma-ng-scenario": "*",
     "karma-phantomjs-launcher": "*",
     "karma-qunit": "*",

test/e2e/mocharepoter.feature

@@ -0,0 +1,48 @@
+Feature: Mocha reporter
+  In order to use Karma
+  As a person who wants to write great tests
+  I want to be able to use the mocha reporter.
+
+  Scenario: Execute a test in PhantomJS with colors
+    Given a configuration with:
+      """
+      files = ['mocha/plus.js', 'mocha/test.js'];
+      browsers = ['PhantomJS'];
+      frameworks = ['mocha', 'chai']
+      colors = true
+      plugins = [
+        'karma-jasmine',
+        'karma-phantomjs-launcher',
+        'karma-mocha-reporter',
+        'karma-mocha',
+        'karma-chai'
+      ];
+      reporters = ['mocha'];
+      """
+    When I start Karma
+    Then it passes with like:
+      """
+      2 tests completed
+      """
+
+  Scenario: Execute a test in PhantomJS with no-colors
+    Given a configuration with:
+      """
+      files = ['mocha/plus.js', 'mocha/test.js'];
+      browsers = ['PhantomJS'];
+      frameworks = ['mocha', 'chai']
+      colors = false
+      plugins = [
+        'karma-jasmine',
+        'karma-phantomjs-launcher',
+        'karma-mocha-reporter',
+        'karma-mocha',
+        'karma-chai'
+      ];
+      reporters = ['mocha'];
+      """
+    When I start Karma
+    Then it passes with like:
+      """
+      ✔ 2 tests completed
+      """

test/e2e/steps/core_steps.js

@@ -154,7 +154,7 @@ module.exports = function coreSteps () {
       return callback()
     }
 
-    if (actualOutput.indexOf(expectedOutput) >= 0) {
+    if (actualOutput.indexOf(expectedOutput) === 0) {
       return callback()
     }
 

test/e2e/support/mocha/plus.js

@@ -0,0 +1,5 @@
+/* eslint-disable no-unused-vars */
+// Some code under test
+function plus (a, b) {
+  return a + b
+}

test/e2e/support/mocha/test.js

@@ -0,0 +1,10 @@
+/* globals plus */
+describe('plus', function () {
+  it('should pass', function () {
+    expect(true).to.be.true
+  })
+
+  it('should work', function () {
+    expect(plus(1, 2)).to.equal(3)
+  })
+})