headless chrome for unit tests (#169)

.travis.yml

@@ -12,16 +12,12 @@ cache:
 services:
   - docker
 
-before_install:
-  - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
-
 install:
   - npm install
 
 script:
   - npm run build
-  - npm run test -- --single-run --no-progress --browser=ChromeNoSandbox
+  - npm run test -- --single-run --no-progress
 
 # Send coverage data to codecov
 after_success:

karma.conf.js

@@ -38,11 +38,16 @@ module.exports = function (config) {
     colors: true,
     logLevel: config.LOG_INFO,
     autoWatch: true,
-    browsers: ['Chrome'],
+    browsers: ['ChromeHeadless'],
     customLaunchers: {
-      ChromeNoSandbox: {
+      ChromeHeadless: {
         base: 'Chrome',
-        flags: ['--no-sandbox']
+        flags: [
+          '--no-sandbox',
+          '--headless',
+          '--disable-gpu',
+          '--remote-debugging-port=9222'
+        ]
       }
     },
     singleRun: false,