add test matrix

Signed-off-by: Jay DeLuca <jaydeluca4@gmail.com>

Author: jaydeluca

.github/workflows/multi-version-test.yml

@@ -0,0 +1,45 @@
+---
+name: Multi-Version Compatibility Tests
+
+on: [pull_request]
+
+permissions: {}
+
+jobs:
+  compatibility-test:
+    name: Test on Java ${{ matrix.java }}
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        java: [11, 17, 21, 25]
+    steps:
+      - name: Check out
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
+        with:
+          persist-credentials: false
+
+      - name: Set up Java ${{ matrix.java }}
+        id: setup-java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java }}
+
+      - name: Cache local Maven repository
+        uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-java${{ matrix.java }}-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-java${{ matrix.java }}-
+            ${{ runner.os }}-maven-
+
+      - name: Build and test on Java ${{ matrix.java }}
+        run: |
+          if [ "${{ matrix.java }}" = "11" ]; then
+            echo "Building on Java 11 - excluding integration-tests module (GraalVM plugin requires Java 17+)"
+            ./mvnw clean install -Dtest.java.version=11 -pl '!integration-tests'
+          else
+            ./mvnw clean install -Dtest.java.version=${{ matrix.java }}
+          fi

pom.xml

@@ -28,6 +28,7 @@
     <junit-jupiter.version>6.0.1</junit-jupiter.version>
     <otel.instrumentation.version>2.16.0-alpha</otel.instrumentation.version>
     <java.version>8</java.version>
+    <test.java.version>25</test.java.version>
     <jacoco.line-coverage>0.70</jacoco.line-coverage>
     <checkstyle.skip>false</checkstyle.skip>
     <coverage.skip>false</coverage.skip>
@@ -252,9 +253,9 @@
           <release>${java.version}</release>
           <source>${java.version}</source>
           <target>${java.version}</target>
-          <testRelease>25</testRelease>
-          <testSource>25</testSource>
-          <testTarget>25</testTarget>
+          <testRelease>${test.java.version}</testRelease>
+          <testSource>${test.java.version}</testSource>
+          <testTarget>${test.java.version}</testTarget>
           <showWarnings>true</showWarnings>
           <compilerArgs>
             <arg>-Xlint:all,-serial,-processing,-options</arg>