Upgrade to JUnit Jupiter 6.0.0

Closes gh-47383

core/spring-boot-test/src/main/java/org/springframework/boot/test/system/OutputCaptureExtension.java

@@ -128,7 +128,7 @@ public class OutputCaptureExtension
 	}
 
 	private OutputCapture getOutputCapture(ExtensionContext context) {
-		return getStore(context).getOrComputeIfAbsent(OutputCapture.class, (key) -> new OutputCapture(),
+		return getStore(context).computeIfAbsent(OutputCapture.class, (key) -> new OutputCapture(),
 				OutputCapture.class);
 	}
 

gradle.properties

@@ -14,7 +14,7 @@ hamcrestVersion=3.0
 jackson2Version=2.20.0
 jacksonVersion=3.0.0-rc9
 javaFormatVersion=0.0.47
-junitJupiterVersion=5.13.4
+junitJupiterVersion=6.0.0
 kotlinVersion=2.2.10
 mavenVersion=3.9.10
 mockitoVersion=5.19.0

module/spring-boot-tx/src/test/java/org/springframework/boot/transaction/jta/autoconfigure/JtaAutoConfigurationTests.java

@@ -168,7 +168,7 @@ class JtaAutoConfigurationTests {
 		public void beforeEach(ExtensionContext context) throws Exception {
 			Namespace namespace = Namespace.create(getClass(), context.getUniqueId());
 			context.getStore(namespace)
-				.getOrComputeIfAbsent(InitialContext.class, (k) -> createInitialContext(), InitialContext.class);
+				.computeIfAbsent(InitialContext.class, (k) -> createInitialContext(), InitialContext.class);
 		}
 
 		private InitialContext createInitialContext() {

test-support/spring-boot-test-support/src/main/java/org/springframework/boot/testsupport/system/OutputCaptureExtension.java

@@ -103,7 +103,7 @@ public class OutputCaptureExtension
 	}
 
 	private OutputCapture getOutputCapture(ExtensionContext context) {
-		return getStore(context).getOrComputeIfAbsent(OutputCapture.class);
+		return getStore(context).computeIfAbsent(OutputCapture.class);
 	}
 
 	private Store getStore(ExtensionContext context) {