Revert IL2CPP setting in test project.

Add test for IL2CPP.

.github/workflows/main.yml

@@ -282,6 +282,60 @@ jobs:
           path: ${{ steps.standalone.outputs.artifactsPath }}
           retention-days: 14
 
+  testRunnerInStandaloneWithIL2CPP:
+    name: Test standalone with IL2CPP 📺
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        projectPath:
+          - unity-project-with-correct-tests
+        unityVersion:
+          - 2019.4.40f1 # Only 2019.4+ docker images contain the IL2CPP backend installed.
+    steps:
+      ###########################
+      #         Checkout        #
+      ###########################
+      - uses: actions/checkout@v3
+        with:
+          lfs: true
+
+      ###########################
+      #          Cache          #
+      ###########################
+      - uses: actions/cache@v3
+        with:
+          path: ${{ matrix.projectPath }}/Library
+          key: Library-${{ matrix.projectPath }}-${{ matrix.targetPlatform }}
+          restore-keys: |
+            Library-${{ matrix.projectPath }}-
+            Library-
+
+      # Set scripting backend to IL2CPP
+      - name: Rewrite ProjectSettings
+        run: |
+          DefineOriginal="  scriptingBackend: {}"
+          DefineReplace="  scriptingBackend: \\n    Standalone: 1"
+          sed -i "{s/$DefineOriginal/$DefineReplace/g}" ${{ matrix.projectPath }}/ProjectSettings/ProjectSettings.asset
+
+      # Configure test runner
+      - name: Run tests
+        id: standalone
+        uses: ./
+        with:
+          projectPath: ${{ matrix.projectPath }}
+          unityVersion: ${{ matrix.unityVersion }}
+          testMode: standalone
+          artifactsPath: artifacts/standalone
+
+      # Upload artifacts
+      - name: Upload test results
+        uses: actions/upload-artifact@v3
+        with:
+          name: Test results (play mode)
+          path: ${{ steps.standalone.outputs.artifactsPath }}
+          retention-days: 14
+
   testEachModeSequentially:
     name: Test each mode sequentially 👩‍👩‍👧‍👦 # don't try this at home (it's much slower)
     runs-on: ubuntu-latest

unity-project-with-correct-tests/ProjectSettings/ProjectSettings.asset

@@ -551,8 +551,7 @@ PlayerSettings:
   webGLWasmStreaming: 0
   scriptingDefineSymbols: {}
   platformArchitecture: {}
-  scriptingBackend:
-    Standalone: 1
+  scriptingBackend: {}
   il2cppCompilerConfiguration: {}
   managedStrippingLevel: {}
   incrementalIl2cppBuild: {}