use Chrome for browser tests when run on macOS Sierra; closes mochajs#2524

Author: boneskull

karma.conf.js

@@ -4,6 +4,7 @@ var fs = require('fs');
 var path = require('path');
 var mkdirp = require('mkdirp');
 var baseBundleDirpath = path.join(__dirname, '.karma');
+var osName = require('os-name');
 
 module.exports = function (config) {
   var bundleDirpath;
@@ -47,7 +48,7 @@ module.exports = function (config) {
     },
     reporters: ['spec'],
     colors: true,
-    browsers: ['PhantomJS'],
+    browsers: [osName() === 'macOS Sierra' ? 'Chrome' : 'PhantomJS'],
     logLevel: config.LOG_INFO,
     client: {
       mocha: {

package.json

@@ -324,11 +324,13 @@
     "expect.js": "^0.3.1",
     "karma": "^1.1.0",
     "karma-browserify": "^5.0.5",
+    "karma-chrome-launcher": "^2.0.0",
     "karma-expect": "^1.1.2",
     "karma-no-mocha": "^2.0.0",
     "karma-phantomjs-launcher": "^0.2.3",
     "karma-sauce-launcher": "^1.0.0",
     "karma-spec-reporter": "0.0.26",
+    "os-name": "^2.0.1",
     "phantomjs": "1.9.8",
     "rimraf": "^2.5.2",
     "should": "^9.0.2",