migrate BrowserStack tests from TravisCI to GitHub Actions

.github/workflows/test-workflow.yml

@@ -61,7 +61,7 @@ jobs:
       - name: Run tests
         run: yarn test:csp-header
   test-chrome:
-    name: test in chromium
+    name: test against Chrome
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -81,7 +81,7 @@ jobs:
       - name: run tests in chrome
         run: yarn test:ember --launch Chrome --path dist
   test-firefox:
-    name: test in firefox
+    name: test against Firefox
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -98,6 +98,37 @@ jobs:
         run: yarn build --environment test
       - name: run tests in firefox
         run: yarn test:ember --launch Firefox --path dist
+  test-browserstack:
+    name: test against additional browser in BrowserStack
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '12.x'
+      - name: Install node modules
+        run: yarn install
+      - name: Build with test environment
+        env:
+          CI: true
+        run: yarn build --environment test
+      - name: 'BrowserStack Env Setup'
+        uses: 'browserstack/github-actions/setup-env@master'
+        with:
+          username:  ${{ secrets.BROWSERSTACK_USERNAME }}
+          access-key: ${{ secrets.BROWSERSTACK_ACCESS_KEY }}
+      - name: 'Start BrowserStackLocal Tunnel'
+        uses: 'browserstack/github-actions/setup-local@master'
+        with:
+          local-testing: 'start'
+          local-logging-level: 'all-logs'
+          local-identifier: 'random'
+      - name: 'Running test on BrowserStack'
+        run: yarn test:ember --config-file testem.browserstack.js --path dist
+      - name: 'BrowserStackLocal Stop'
+        uses: browserstack/github-actions/setup-local@master
+        with:
+          local-testing: stop
   test-backend:
     name: Test php backend
     runs-on: ubuntu-latest