Use yarn.

.travis.yml

@@ -1,33 +1,66 @@
 language: node_js
 sudo: false
 node_js:
- - "6"
+ - 6
+
 cache:
  directories:
  - $HOME/.npm
+ - $HOME/.yarn-cache
+ - travis_phantomjs
+
 env:
  global:
- - BIN="node" ISTANBUL=false
- - secure: "XOINlYZG3DYXq5agQXvkad2MfnOO/+z40fn37RKfNuxNI5veBK7tPRcCIQ998o+NyVTpyd3NZhqkowCxAL8bp4HJ81SesRKQSaXoSzgV7CnloxLxcduiiRJ6lnxFGgCbpqyLxZHWr0mQugcLhs5nhiZ5Dnw6dZxYX/oKKvOomZA="
+ - BIN=node ISTANBUL=false
+ - secure: XOINlYZG3DYXq5agQXvkad2MfnOO/+z40fn37RKfNuxNI5veBK7tPRcCIQ998o+NyVTpyd3NZhqkowCxAL8bp4HJ81SesRKQSaXoSzgV7CnloxLxcduiiRJ6lnxFGgCbpqyLxZHWr0mQugcLhs5nhiZ5Dnw6dZxYX/oKKvOomZA=
  matrix:
  -
  - ISTANBUL=true
- - BIN="phantomjs"
+ - BIN=phantomjs
+
 matrix:
  include:
- - node_js: "4"
+ - node_js: 4
  env:
+
 git:
  depth: 10
+
 branches:
  only:
  - master
+
 before_install:
- - "nvm use $TRAVIS_NODE_VERSION"
- - "npm set loglevel error"
- - "npm set progress false"
- - "npm i -g npm@\"^2.0.0\""
+ # Upgrade PhantomJS.
+ - |
+ export PHANTOMJS_VERSION=2.1.1
+ export PATH=$PWD/travis_phantomjs/phantomjs-$PHANTOMJS_VERSION-linux-x86_64/bin:$PATH
+ if [ $(phantomjs --version) != $PHANTOMJS_VERSION ]; then
+ rm -rf $PWD/travis_phantomjs
+ mkdir -p $PWD/travis_phantomjs
+ wget https://github.com/Medium/phantomjs/releases/download/v$PHANTOMJS_VERSION/phantomjs-$PHANTOMJS_VERSION-linux-x86_64.tar.bz2
+ tar -xvf phantomjs-$PHANTOMJS_VERSION-linux-x86_64.tar.bz2 -C $PWD/travis_phantomjs
+ fi
+ phantomjs -v
+
+ # Use exact Node version.
+ - nvm use $TRAVIS_NODE_VERSION
+
+ # Setup package managers.
+ - npm set loglevel error
+ - npm set progress false
+ - npm i -g yarn
+ - yarn -V
+
+install:
+ # Install packages.
+ - yarn
+
 script:
- - "[ $ISTANBUL == false ] || (istanbul cover -x \"**/vendor/**\" --report lcovonly ./test/test.js && cat ./coverage/lcov.info | coveralls && rm -rf ./coverage) || true"
- - "[ $ISTANBUL == true ] || cd ./test"
- - "[ $ISTANBUL == true ] || $BIN ./test.js"
+ - |
+ if [ $ISTANBUL = true ]; then
+ istanbul cover -x "**/vendor/**" --report lcovonly ./test/test.js && cat ./coverage/lcov.info | coveralls && rm -rf ./coverage
+ else
+ cd ./test
+ $BIN ./test.js
+ fi