added java 21 tests

Author: tanya732

.github/workflows/build-and-test.yml

@@ -9,17 +9,12 @@ on:
 jobs:
   gradle:
     runs-on:  ubuntu-latest
-
-    strategy:
-      matrix:
-        java-version: [11, 21]
-
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-java@v3
         with:
           distribution: temurin
-          java-version: ${{ matrix.java-version }}
+          java-version: 11
       - uses: gradle/gradle-build-action@a4cf152f482c7ca97ef56ead29bf08bcd953284c
         with:
           arguments: assemble apiDiff check jacocoTestReport --continue --console=plain

lib/build.gradle

@@ -154,9 +154,20 @@ def testJava17 = tasks.register('testJava17', Test) {
     shouldRunAfter(tasks.named('test'))
 }
 
+def testJava21 = tasks.register('testJava21', Test) {
+    description = 'Runs unit tests on Java 21.'
+    group = 'verification'
+
+    javaLauncher.set(javaToolchains.launcherFor {
+        languageVersion = JavaLanguageVersion.of(21)
+    })
+    shouldRunAfter(tasks.named('test'))
+}
+
 tasks.named('check') {
     dependsOn(testJava8)
     dependsOn(testJava17)
+    dependsOn(testJava21)
 }
 
 jar {