Reenable functional tests in CI

.github/workflows/ci.yml

@@ -69,3 +69,30 @@ jobs:
           bundler-cache: true
       - name: Run rubocop
         run: bundle exec rake lint
+
+  functional:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ["2.0", "ruby"]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run functional tests
+        run: bundle exec rake test:functional
+
+  functional-all:
+    runs-on: ubuntu-latest
+    needs: [functional]
+    if: always()
+    steps:
+      - name: All tests ok
+        if: ${{ !(contains(needs.*.result, 'failure')) }}
+        run: exit 0
+      - name: Some tests failed
+        if: ${{ contains(needs.*.result, 'failure') }}
+        run: exit 1