Fix linux

// FREEBIE

.travis.yml

@@ -10,7 +10,7 @@ install:
 script:
   - yarn run generate
   - ./node_modules/.bin/build --em.environment=$SIGNAL_ENV --config.mac.bundleVersion='$TRAVIS_BUILD_NUMBER' --publish=never
-  - grunt test-release:$TRAVIS_OS_NAME
+  - ./travis.sh
   - yarn test
 env:
   global:

travis.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then
+  export DISPLAY=:99.0
+  sh -e /etc/init.d/xvfb start
+  sleep 3
+fi
+grunt test-release:$TRAVIS_OS_NAME