chore(ci): Improve CI builds (#605)

Remove some extraneous settings at travis, and switch to using Firefox
at Travis rather than saucelabs.

Use the yarn that is installed, see https://docs.travis-ci.com/user/build-environment-updates/2017-12-12/

.travis.yml

@@ -8,21 +8,16 @@ dist: trusty
 
 addons:
   chrome: stable
+  firefox: "latest"
   sauce_connect:
     username: "mobiledoc-kit"
     access_key: "f9cad21d-1141-452d-8f64-c6ba3f43faa6"
 
+env:
+  - MOZ_HEADLESS=1 # necessary for Firefox headless, see https://docs.travis-ci.com/user/gui-and-headless-browsers/#Using-the-Firefox-addon-in-headless-mode
+
 cache:
   yarn: true
 
-before_install:
-  - curl -o- -L https://yarnpkg.com/install.sh | bash -s -- --version 0.27.5
-  - export PATH=$HOME/.yarn/bin:$PATH
-
-# Fixes issue starting ChromeHeadless, see https://github.com/travis-ci/travis-ci/issues/9024
-before_script:
-  - "sudo chown root /opt/google/chrome/chrome-sandbox"
-  - "sudo chmod 4755 /opt/google/chrome/chrome-sandbox"
-
 script:
   - yarn test:ci

package.json

@@ -5,8 +5,8 @@
   "repository": "https://github.com/bustle/mobiledoc-kit",
   "scripts": {
     "start": "broccoli serve --host 0.0.0.0",
-    "test:ci": "npm run build:docs && npm run build && testem ci -f testem-ci.json",
-    "test": "npm run build:docs && npm run build && testem ci -f testem.json",
+    "test:ci": "npm run build:docs && npm run build && testem ci -f testem-ci.js",
+    "test": "npm run build:docs && npm run build && testem ci -f testem.js",
     "build": "rm -rf dist && broccoli build dist",
     "build:docs": "jsdoc -c ./.jsdoc",
     "build:website": "npm run build && npm run build:docs && ./bin/build-website.sh",

testem-ci.json → testem-ci.js

@@ -1,4 +1,5 @@
-{
+/* eslint-env node */
+module.exports = {
   "framework": "qunit",
   "parallel": 5,
   "disable_watching": true,
@@ -17,11 +18,6 @@
       "args": ["-b", "internet explorer", "-v", "11", "--no-connect", "-u"],
       "protocol": "tap"
     },
-    "SL_Firefox_Current": {
-      "exe": "saucie",
-      "args": ["-b", "firefox", "-p", "Windows 10", "-v", "latest", "--no-connect", "-u"],
-      "protocol": "tap"
-    },
     "SL_Safari_Current": {
       "exe": "saucie",
       "args": ["-b", "safari", "-v", "9", "--no-connect", "-u"],
@@ -30,17 +26,18 @@
   },
   "launch_in_ci": [
     "Chrome",
-    "SL_Firefox_Current",
+    "Firefox",
     "SL_Safari_Current",
     "SL_MS_Edge",
     "SL_IE_11"
   ],
   "browser_args": {
     "Chrome": [
+      "--no-sandbox", // Fixes issue starting ChromeHeadless, see https://github.com/travis-ci/travis-ci/issues/9024
       "--disable-gpu",
       "--headless",
       "--remote-debugging-port=9222",
       "--window-size=1440,900"
     ]
   }
-}
+};

testem.json → testem.js

@@ -1,4 +1,5 @@
-{
+/* eslint-env node */
+module.exports = {
   "framework": "qunit",
   "test_page": "dist/tests/index.html?hidepassed",
   "src_files": [
@@ -21,4 +22,4 @@
       "--window-size=1440,900"
     ]
   }
-}
+};