Linking to PhantomJS installed on PATH

.travis.yml

@@ -1,6 +1,9 @@
 language: ruby
 sudo: false
-cache: bundler
+cache:
+  - bundler
+  - directories:
+    - travis-phantomjs
 bundler_args: --without development
 rvm:
   - "2.1.5"
@@ -23,12 +26,18 @@ env:
     - CI_NODE_INDEX=4 KARMA="true" GITHUB_DEPLOY="true"
 
 before_script:
+  - mkdir travis-phantomjs || true
+  - wget https://bitbucket.org/ariya/phantomjs/downloads/phantomjs-2.1.1-linux-x86_64.tar.bz2 -O $PWD/travis-phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2
+  - tar -xvf $PWD/travis-phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2 -C $PWD/travis-phantomjs
+  - export PATH=$PWD/travis-phantomjs/phantomjs-2.1.1-linux-x86_64/bin:$PATH
+
   - cp config/database.travis.yml config/database.yml
   - cp config/application.yml.example config/application.yml
   - RAILS_ENV=test bundle exec rake db:create db:schema:load
+
   - >
     if [ "$KARMA" = "true" ]; then
-      npm install -g npm@'~3.8.8'
+      npm install -g npm@'3.8.8'
       npm install
       npm install -g karma-cli@0.1.2
     fi

package.json

@@ -6,6 +6,7 @@
     "url": "https://github.com/openfoodfoundation/openfoodnetwork"
   },
   "devDependencies": {
+    "phantomjs-prebuilt": "~2.1.7",
     "karma": "~0.13.22",
     "karma-jasmine": "~0.3.8",
     "jasmine-core": "~2.4.1",