Test against JDK 17, 21 and 25 in CI (#74) (#171)

Author: davidpavlovschi

.github/workflows/maven_test.yml

@@ -11,30 +11,38 @@ concurrency:
 
 jobs:
   test:
-    name: Test
+    name: Test (JDK ${{ matrix.java }})
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        # 17 is the lowest JDK that can build this project: the Jackson 3
+        # dependency requires a Java 17 baseline and the multi-release build has
+        # a `release 17` compile execution. The Java 8 *target* stays covered by
+        # `<release>${java.version}</release>` on the default-compile execution.
+        java: [ 17, 21, 25 ]
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 0
-      - name: Set up JDK 17
+      - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@03ad4de0992f5dab5e18fcb136590ce7c4a0ac95 # v5.6.0
         with:
-          java-version: 17
+          java-version: ${{ matrix.java }}
           distribution: 'temurin'
       - name: Cache and restore Maven packages on master
         uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         if: ${{ github.ref_name == 'master' }}
         with:
           path: ~/.m2
-          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
-          restore-keys: ${{ runner.os }}-m2
+          key: ${{ runner.os }}-m2-jdk${{ matrix.java }}-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2-jdk${{ matrix.java }}
       - name: Restore Maven packages on PR
         uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         if: ${{ github.ref_name != 'master' }}
         with:
           path: ~/.m2
-          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
-          restore-keys: ${{ runner.os }}-m2
+          key: ${{ runner.os }}-m2-jdk${{ matrix.java }}-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2-jdk${{ matrix.java }}
       - name: Build and Test
         run: ./mvnw clean verify -P integration-test