Merge pull request #103 from Turbo87/chrome

Use headless Chrome for testing

testem.js

@@ -1,13 +1,25 @@
 /*jshint node:true*/
 module.exports = {
-  "framework": "qunit",
-  "test_page": "tests/index.html?hidepassed",
-  "disable_watching": true,
-  "launch_in_ci": [
-    "PhantomJS"
+  test_page: 'tests/index.html?hidepassed',
+  disable_watching: true,
+  launch_in_ci: [
+    'Chrome'
   ],
-  "launch_in_dev": [
-    "PhantomJS",
-    "Chrome"
-  ]
+  launch_in_dev: [
+    'Chrome'
+  ],
+  browser_args: {
+    Chrome: {
+      mode: 'ci',
+      args: [
+        // --no-sandbox is needed when running Chrome inside a container
+        process.env.TRAVIS ? '--no-sandbox' : null,
+
+        '--disable-gpu',
+        '--headless',
+        '--remote-debugging-port=0',
+        '--window-size=1440,900'
+      ].filter(Boolean)
+    }
+  }
 };