chore(circle): add sauce-connect

Author: Awk34

Diff for: circle.yml

@@ -17,6 +17,9 @@ dependencies:
   # builds. If you need to, you can add custom paths to cache:
   cache_directories:
     - "test/fixtures/node_modules"
+  post:
+    - wget https://saucelabs.com/downloads/sc-latest-linux.tar.gz
+    - tar -xzf sc-latest-linux.tar.gz
 
 ## Custom notifications
 #notify:
@@ -25,3 +28,12 @@ notify:
     # A list of hook hashes, containing the url field
     # gitter hook
     - url: https://webhooks.gitter.im/e/ac3980c61cb722b9e789
+
+test:
+  pre:
+    - cd sc-*-linux && ./bin/sc --user $SAUCE_USERNAME --api-key $SAUCE_ACCESS_KEY --readyfile ~/sauce_is_ready:
+        background: true
+    # Wait for tunnel to be ready
+    - while [ ! -e ~/sauce_is_ready ]; do sleep 1; done
+  post:
+    - killall --wait sc  # wait for Sauce Connect to close the tunnel