add jvm tests

.github/workflows/ci.yaml

@@ -15,6 +15,34 @@ env:
   OCI_EXE: docker
 
 jobs:
+  jvm:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        # we build with a specific JDK version but source/target compatibility should ensure the jar is usable by
+        # the target versions we want to support
+        java-version:
+          - 8
+          - 11
+          - 17
+          - 21
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+      - name: Setup build environment
+        uses: ./.github/actions/setup-build
+      - name: Test with ${{ matrix.java-version }}
+        shell: bash
+        run: |
+          ./gradlew -Ptest.java.version=${{ matrix.java-version }} -Paws.sdk.kotlin.crt.disableCrossCompile=true jvmTest --stacktrace 
+      - name: Save Test Reports
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-reports-jvm-${{ matrix.java-version }}
+          path: '**/build/reports'
+
   # macos-14 build and test for targets: jvm, macoArm64, iosSimulatorArm64, watchosSimulatorArm65, tvosSimulatorArm64
   # macos-13 build and test for targets: jvm, macoX64, iosX64, tvosX64, watchosX64
   macos:
@@ -103,6 +131,25 @@ jobs:
           RUN_CONTAINER_TEST=./native-test-binaries/.github/scripts/run-container-test.py 
           $RUN_CONTAINER_TEST --distro ${{ matrix.distro }} --arch ${{ matrix.arch }} --test-bin-dir ./native-test-binaries/aws-crt-kotlin/build/bin
 
+  # windows JVM
+  windows:
+    runs-on: windows-2022
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Setup build environment
+        uses: ./.github/actions/setup-build
+      - name: Build and Test ${{ env.PACKAGE_NAME }}
+        run: |
+          ./gradlew -Paws.sdk.kotlin.crt.disableCrossCompile=true build
+      - name: Save Test Reports
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-reports-windows
+          path: '**/build/reports'
+
 # TODO - native test reports?
-# TODO - windows jvm, windows native, jvm versions
+# TODO - windows native
 

aws-crt-kotlin/build.gradle.kts

@@ -184,3 +184,21 @@ val disableCrossCompile = typedProp<Boolean>("aws.sdk.kotlin.crt.disableCrossCom
 if (disableCrossCompile) {
     disableCrossCompileTargets()
 }
+
+// run tests on specific JVM version
+val testJavaVersion = typedProp<String>("test.java.version")?.let {
+    JavaLanguageVersion.of(it)
+}?.also {
+    println("configuring tests to run with jdk $it")
+}
+
+if (testJavaVersion != null) {
+    tasks.withType<Test> {
+        val toolchains = project.extensions.getByType<JavaToolchainService>()
+        javaLauncher.set(
+            toolchains.launcherFor {
+                languageVersion.set(testJavaVersion)
+            },
+        )
+    }
+}