CircleCI (1.0) configuration using parallelism for an EmberJS add-on (Ember-2.13+).

circle.yml

# This configuration file is being used by my EmberJS addon that I recently upgraded to
# Ember-2.14 (the current release at time of writing)
machine:
  node:
    version: 6  # My project is using Node6 for now while Node8 works through some kinks

dependencies:
  cache_directories:
    - '~/.npm'
    - '~/.cache'  # includes bower & yarn
  pre:
    - npm config set spin false # Turn off npm spinner & feedback
    - npm install -g bower  # My projects are still using bower so install it so I can `bower install`
    # This makes sure Chrome is always up to date in your test suite
    # On average this adds about 10 seconds to your build suite
    # Be sure to use Ubuntu 14.04 (Trusty) in the CircleCI's OS setting (Settings > Build Environment)
    # @see https://gist.github.com/Arjeno/8564d9643f16d072a85b9c9b5a9f7de0
    - curl -L -o google-chrome.deb https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
    - sudo dpkg -i google-chrome.deb
    - sudo sed -i 's|HERE/chrome\"|HERE/chrome\" --disable-setuid-sandbox|g' /opt/google/chrome/google-chrome
    - rm google-chrome.deb
  post:
    - bower install # As mentioned earlier, I need to install bower dependecies for my tests to work
test:
  override:
    # You get FOUR free machines to test against; use a case statement to test each
    # of the ember try scenarios.  In my particular addon's case:
    # Machine-0: ember-lts-2.4 && ember-lts-2.8
    # Machine-1: ember-lts-2.12 && ember-default
    # Machine-2: ember-release && ember-beta
    # Machine-3: ember-canary
    # Adjust this however you see fit; keep the `case` on one line & double indent the `parallel: true`
    # @see https://circleci.com/docs/1.0/parallel-manual-setup/#a-simple-example
    - case $CIRCLE_NODE_INDEX in 0) node_modules/.bin/ember try:one ember-lts-2.4 --skip-cleanup && node_modules/.bin/ember try:one ember-lts-2.8 --skip-cleanup; ;; 1) node_modules/.bin/ember try:one ember-lts-2.12 --skip-cleanup && node_modules/.bin/ember try:one ember-default --skip-cleanup ;; 2)  node_modules/.bin/ember try:one ember-release --skip-cleanup && node_modules/.bin/ember try:one ember-beta --skip-cleanup ;; 3) node_modules/.bin/ember try:one ember-canary --skip-cleanup ;; esac:
        parallel: true