lighthouse test tweaks

.travis.yml

@@ -3,7 +3,7 @@ language: node_js
 node_js: node
 
 addons:
-  chrome: stable
+  chrome: beta
 
 cache:
   directories:
@@ -13,12 +13,6 @@ cache:
 install:
   - npm i
 
-before_script:
-  - export DISPLAY=:99.0
-  - export CHROME_PATH="$(pwd)/chrome-linux/chrome"
-  - sh -e /etc/init.d/xvfb start
-  - sleep 3 # wait for xvfb to boot
-
 script:
   - npm test
   - npm run build

scripts/lighthouse.test.js

@@ -8,14 +8,17 @@ const launchChromeAndRunLighthouse = (
   opts = { chromeFlags: ['--headless'] },
   config = null
 ) =>
-  chromeLauncher.launch({ chromeFlags: opts.chromeFlags }).then(chrome => {
+  chromeLauncher
+    .launch({ chromeFlags: opts.chromeFlags })
+    .then(async chrome => {
       opts.port = chrome.port
-    return lighthouse(url, opts, config).then(results =>
-      chrome.kill().then(() => results.lhr)
-    )
+      const results = await lighthouse(url, opts, config)
+      await chrome.kill()
+      return results.lhr
     })
 
 let scores
+
 test.before(async () => {
   console.log(`Auditing ${siteMetadata.siteUrl}.\n`) // eslint-disable-line no-console
   scores = await launchChromeAndRunLighthouse(siteMetadata.siteUrl).then(