chore: add lockfiles to ensure consistent builds in CI

.github/workflows/unit-tests.yml

@@ -0,0 +1,72 @@
+name: Unit Tests
+
+# all pull requests
+on: pull_request
+
+jobs:
+  unit-tests-p2:
+    name: Polymer 2 on the CI agent
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Node 12.x
+        uses: actions/setup-node@v2
+        with:
+          node-version: 12.x
+
+      - name: Check out the source code
+        uses: actions/checkout@v2
+
+      - name: Install latest npm
+        # magi-cli 1.0 requires npm 7 or higher
+        run: "npm install -g npm@8"
+
+      - name: Install global npm dependencies
+        # bower is needed to run 'bower install'
+        # polymer-cli is needed to run the lint step
+        run: "npm install --quiet --no-progress --global bower polymer-cli"
+
+      - name: Install project npm dependencies
+        run: "npm ci"
+
+      - name: Install project Bower dependencies
+        run: "bower install --quiet"
+
+      # the full set of environments is tested with Polymer 3 below
+      - name: Run unit tests locally (in the VM instance running this job)
+        run: "xvfb-run -s '-screen 0 1024x768x24' npm test"
+
+  unit-tests-p3:
+    name: Polymer 3 on SauceLabs
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Node 12.x
+        uses: actions/setup-node@v2
+        with:
+          node-version: 12.x
+
+      - name: Check out the (Polymer 2) source code
+        uses: actions/checkout@v2
+
+      - name: Install latest npm
+        # magi-cli 1.0 requires npm 7 or higher
+        run: "npm install -g npm@8"
+
+      - name: Install global npm dependencies
+        # bower and polymer-modulizer are needed to run the Polymer 3 conversion step
+        run: "npm install --quiet --no-progress --global bower magi-cli polymer-modulizer"
+
+      - name: Convert the source code to Polymer 3
+        run: |
+          git config --local user.email "github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          magi p3-convert --out . --import-style=name
+
+      # workaround for running tests on Android on SauceLabs (see wct.conf.js)
+      - name: Add 'localhost-for-saucelabs' to /etc/hosts
+        run: echo "127.0.0.1 localhost-for-saucelabs" | sudo tee -a /etc/hosts
+
+      - name: Run unit tests on SauceLabs
+        run: "npm test -- --env saucelabs"
+        env:
+          SAUCE_USERNAME: ${{ secrets.SAUCE_USERNAME }}
+          SAUCE_ACCESS_KEY: ${{ secrets.SAUCE_ACCESS_KEY }}

.gitignore

@@ -1,3 +1,2 @@
-package-lock.json
 bower_components
 node_modules