Add JDK 27 support

Add JDK 27-ea to cross-version test matrix, add JDK 27 to
Jupiter's `JRE` enum, and mute Maven warnings.

---------

Signed-off-by: Christian Stein <sormuras@gmail.com>

Author: sormuras

.github/workflows/cross-version.yml

@@ -31,6 +31,8 @@ jobs:
           type: ga
         - version: 26
           type: ea
+        - version: 27
+          type: ea
         - version: 26
           type: ea
           release: leyden

documentation/src/docs/asciidoc/release-notes/release-notes-6.1.0-M2.adoc

@@ -45,7 +45,7 @@ repository on GitHub.
 [[release-notes-6.1.0-M2-junit-jupiter-new-features-and-improvements]]
 ==== New Features and Improvements
 
-* ❓
+* `JAVA_27` has been added to the `JRE` enum for use with `JRE`-based execution conditions.
 
 
 [[release-notes-6.1.0-M2-junit-vintage]]

gradle/base/code-generator-model/src/main/resources/jre.yaml

@@ -32,3 +32,5 @@
   since: '5.11.4'
 - version: 26
   since: '5.13.2'
+- version: 27
+  since: '6.1.0'

jupiter-tests/src/test/java/org/junit/jupiter/api/condition/EnabledForJreRangeConditionTests.java

@@ -20,6 +20,7 @@
 import static org.junit.jupiter.api.condition.JavaVersionPredicates.onJava24;
 import static org.junit.jupiter.api.condition.JavaVersionPredicates.onJava25;
 import static org.junit.jupiter.api.condition.JavaVersionPredicates.onJava26;
+import static org.junit.jupiter.api.condition.JavaVersionPredicates.onJava27;
 import static org.junit.jupiter.api.condition.JavaVersionPredicates.onKnownVersion;
 import static org.junit.platform.commons.test.PreconditionAssertions.assertPreconditionViolationFor;
 
@@ -195,8 +196,8 @@ void minVersionGreaterThanMax() {
 	@Test
 	void min20() {
 		evaluateCondition();
-		assertEnabledOnCurrentJreIf(
-			onJava20() || onJava21() || onJava22() || onJava23() || onJava24() || onJava25() || onJava26());
+		assertEnabledOnCurrentJreIf(onJava20() || onJava21() || onJava22() || onJava23() || onJava24() || onJava25()
+				|| onJava26() || onJava27());
 	}
 
 	/**
@@ -304,7 +305,8 @@ void minVersion20MaxVersion21() {
 	@Test
 	void minVersion21MaxVersionMaxInteger() {
 		evaluateCondition();
-		assertEnabledOnCurrentJreIf(onJava21() || onJava22() || onJava23() || onJava24() || onJava25() || onJava26());
+		assertEnabledOnCurrentJreIf(
+			onJava21() || onJava22() || onJava23() || onJava24() || onJava25() || onJava26() || onJava27());
 	}
 
 	/**

platform-tooling-support-tests/src/test/java/platform/tooling/support/tests/MavenEnvVars.java

@@ -30,12 +30,15 @@ static Map<String, String> forJre(JRE jre) {
 		var list = new ArrayList<String>();
 		if (jre.compareTo(JRE.JAVA_24) >= 0)
 			list.addAll(FOR_JDK24_AND_LATER);
-		if (jre.compareTo(JRE.JAVA_26) >= 0) {
+		if (jre == JRE.JAVA_26) {
 			// exclude "leyden" and "valhalla" builds
 			if (Runtime.version().build().orElse(0) >= 25) {
 				list.addAll(FOR_JDK26_AND_LATER);
 			}
 		}
+		if (jre.compareTo(JRE.JAVA_27) >= 0) {
+			list.addAll(FOR_JDK26_AND_LATER);
+		}
 		return list.isEmpty() ? Map.of() : Map.of("MAVEN_OPTS", String.join(" ", list));
 	}