CI: Run Kotlin tests on GitHub actions

Author: badboy

.github/workflows/test.yml

@@ -321,6 +321,65 @@ jobs:
             make build-python-wheel GLEAN_BUILD_TARGET="$target" GLEAN_BUILD_EXTRA="--zig"
           done
 
+  test-kotlin:
+    runs-on: ubuntu-latest
+    needs: [decide-runs]
+    if: needs.decide-runs.outputs.rust-changed == 'true' || needs.decide-runs.outputs.kotlin-changed == 'true'
+    steps:
+      - *checkout
+
+      - name: Set up Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - uses: Swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4  # v2.9.1
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@03ad4de0992f5dab5e18fcb136590ce7c4a0ac95 # v5.6.0
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@40fd30fb8d7440372e1316f5d1809ec01dcd3699 # v4.0.1
+        with:
+          accept-android-sdk-licenses: true
+          log-accepted-android-sdk-licenses: false
+
+      - name: Install Android NDK
+        run: |
+          sdkmanager "ndk;29.0.14206865"
+
+      - name: Restrict to Linux builds only
+        run: |
+            echo "rust.targets=linux-x86-64" > local.properties
+
+      - name: Test
+        run: |
+          export GRADLE_OPTS="-Xmx2048m"
+          export TARGET_CFLAGS="-DNDEBUG"
+          ./gradlew --no-daemon :glean:testDebugUnitTest
+
+      - name: Build Android Sample App
+        run: |
+          export GRADLE_OPTS="-Xmx2048m"
+          export TARGET_CFLAGS="-DNDEBUG"
+          ./gradlew :glean-sample-app:assembleAndroidTest
+
+      - name: Save test results
+        if: failure()
+        run: |
+            mkdir -p test-results/junit/
+            mkdir -p test-results/tests/
+            cp -a glean-core/android/build/reports/tests test-results/
+            find glean-core/android/build -type f -regex ".*/build/test-results/.*xml" -exec cp {} test-results/junit/ \;
+
+      - name: Upload test results
+        if: failure()
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: gradle-test-failures
+          path: test-results/tests
+
   lint-yaml:
     runs-on: ubuntu-latest
     needs: [decide-runs]