Add CI tests for sample phoenix application

.github/workflows/elixir.yml

@@ -36,9 +36,9 @@ jobs:
       - run: mix credo --strict --all
       - run: mix dialyzer
 
-  test_examples:
+  test_plug_examples:
     runs-on: ubuntu-latest
-    name: Test Sample Applications
+    name: Test Sample Plug Application
     env:
       MIX_ENV: test
     steps:
@@ -60,6 +60,30 @@ jobs:
         working-directory: ./examples/plug_app
         run: mix do deps.get, test
 
+  test_phoenix_examples:
+    runs-on: ubuntu-latest
+    name: Test Sample Phoenix Application
+    env:
+      MIX_ENV: test
+    steps:
+      - uses: actions/checkout@v2
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: 26
+          elixir-version: 1.16
+      - uses: actions/cache@v2
+        with:
+          key: |
+            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-phoenix-build
+          restore-keys: |
+            ${{ runner.os }}-${{ steps.beam.outputs.elixir-version }}-${{ steps.beam.outputs.otp-version }}-phoenix-build
+          path: |
+            _build
+
+      - name: run Phoenix sample app tests
+        working-directory: ./examples/phoenix_app
+        run: mix do deps.get, test, dialyzer
+
   test:
     runs-on: ubuntu-20.04
     name: Test (OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}})