Fix xvfb error on travis

Author: Gaurav0

.travis.yml

@@ -4,14 +4,15 @@ node_js:
 notifications:
   email: false
 dist: trusty
-sudo: required
+sudo: false
 
 addons:
-  apt:
-    sources:
-    - google-chrome
-    packages:
-    - google-chrome-stable
+  chrome: stable
+
+env:
+  global:
+    # See https://git.io/vdao3 for details.
+    - JOBS=1
 
 cache:
   yarn: true
@@ -20,11 +21,11 @@ cache:
   - $HOME/.cache
 
 before_install:
-- npm config set spin false
-- npm install -g bower phantomjs-prebuilt yarn@~0.21.3
-- bower --version
-- phantomjs --version
-- yarn --version
+  - curl -o- -L https://yarnpkg.com/install.sh | bash
+  - export PATH=$HOME/.yarn/bin:$PATH
+  - yarn global add bower
+  - bower --version
+  - yarn --version
 
 install:
 - yarn

testem.js

@@ -9,5 +9,11 @@ module.exports = {
   "launch_in_dev": [
     "PhantomJS",
     "Chrome"
-  ]
+  ],
+  "browser_args": {
+    "Chrome": [
+        "--disable-gpu",
+        "--no-sandbox"
+    ]
+  }  
 };

tests/helpers/module-for-acceptance.js

@@ -3,7 +3,7 @@ import Ember from 'ember';
 import startApp from '../helpers/start-app';
 import destroyApp from '../helpers/destroy-app';
 
-const { RSVP: { Promise }, run } = Ember;
+const { RSVP: { Promise } } = Ember;
 
 export default function(name, options = {}) {
   module(name, {
@@ -16,7 +16,6 @@ export default function(name, options = {}) {
     },
 
     afterEach() {
-      run.cancelTimers();
       let afterEach = options.afterEach && options.afterEach.apply(this, arguments);
       return Promise.resolve(afterEach).then(() => destroyApp(this.application));
     }