Fix io_uring test classpath configuration for multi-release JAR

reactor-netty-core/build.gradle

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2025 VMware, Inc. or its affiliates, All Rights Reserved.
+ * Copyright (c) 2020-2026 VMware, Inc. or its affiliates, All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -84,28 +84,28 @@ dependencies {
 	//transport resolution: typical build forces epoll but not kqueue transitively
 	//on the other hand, if we want to make transport-specific tests, we'll make all
 	// native optional at compile time and add correct native/nio to testRuntime
+	compileOnly "io.netty:netty-transport-native-kqueue:$nettyVersion"
+	compileOnly "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
+	compileOnly "io.netty:netty-transport-native-io_uring:$nettyVersion"
+	testCompileOnly "io.netty:netty-transport-native-kqueue:$nettyVersion"
+	testCompileOnly "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
+	java11TestCompileOnly "io.netty:netty-transport-native-io_uring:$nettyVersion"
 	if (project.hasProperty("forceTransport")) {
 		//so that the main code compiles
 		compileOnly "io.netty:netty-transport-native-epoll:$nettyVersion"
-		compileOnly "io.netty:netty-transport-native-kqueue:$nettyVersion"
-		compileOnly "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
-		compileOnly "io.netty:netty-transport-native-io_uring:$nettyVersion"
-		testImplementation "io.netty:netty-transport-native-epoll:$nettyVersion"
-		testImplementation "io.netty:netty-transport-native-kqueue:$nettyVersion"
-		testImplementation "io.netty:netty-transport-native-io_uring:$nettyVersion"
-		testImplementation "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
+		testCompileOnly "io.netty:netty-transport-native-epoll:$nettyVersion"
 		//now we explicitly add correctly qualified native, or do nothing if we want to test NIO
 		if (forceTransport == "native") {
 			if (osdetector.os == "osx") {
-				testImplementation "io.netty:netty-transport-native-kqueue:$nettyVersion$os_suffix"
+				testRuntimeOnly "io.netty:netty-transport-native-kqueue:$nettyVersion$os_suffix"
 			}
 			else if (osdetector.os == "linux") {
-				testImplementation "io.netty:netty-transport-native-epoll:$nettyVersion$os_suffix"
+				testRuntimeOnly "io.netty:netty-transport-native-epoll:$nettyVersion$os_suffix"
 			}
 		}
 		else if (forceTransport == "io_uring" && osdetector.os == "linux") {
-			testImplementation "io.netty:netty-transport-native-io_uring:$nettyVersion$os_suffix"
-			testImplementation "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion$os_suffix"
+			testRuntimeOnly "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion$os_suffix"
+			java11TestRuntimeOnly "io.netty:netty-transport-native-io_uring:$nettyVersion$os_suffix"
 		}
 		else if (forceTransport != "nio") {
 			throw new InvalidUserDataException("invalid -PforceTransport option " + forceTransport + ", should be native|nio|io_uring")
@@ -114,12 +114,6 @@ dependencies {
 	else {
 		//classic build to be distributed
 		api "io.netty:netty-transport-native-epoll:$nettyVersion:linux-x86_64"
-		compileOnly "io.netty:netty-transport-native-kqueue:$nettyVersion"
-		compileOnly "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
-		compileOnly "io.netty:netty-transport-native-io_uring:$nettyVersion"
-		testImplementation "io.netty:netty-transport-native-kqueue:$nettyVersion"
-		testImplementation "io.netty:netty-transport-native-io_uring:$nettyVersion"
-		testImplementation "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
 	}
 
 	//Metrics
@@ -207,7 +201,11 @@ java17Test {
 	jvmArgs = ["-XX:+AllowRedefinitionToAddDeleteMethods"]
 }
 java11Test {
-	classpath = sourceSets.main.output + sourceSets.test.runtimeClasspath
+	// Ensure runtime classpath includes test dependencies plus java11Test specific ones
+	// Exclude incubator io_uring from test.runtimeClasspath as java11 uses the new non-incubator version
+	classpath = sourceSets.main.output + (sourceSets.test.runtimeClasspath - configurations.testRuntimeClasspath.fileCollection { 
+		it.group == 'io.netty.incubator' && it.name.contains('io_uring')
+	}) + sourceSets.java11Test.runtimeClasspath
 }
 
 components.java.withVariantsFromConfiguration(configurations.testFixturesApiElements) { skip() }

reactor-netty-core/src/test/java/reactor/netty/resources/DefaultLoopResourcesTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2025 VMware, Inc. or its affiliates, All Rights Reserved.
+ * Copyright (c) 2017-2026 VMware, Inc. or its affiliates, All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,9 +24,8 @@
 import io.netty.channel.epoll.Epoll;
 import io.netty.channel.kqueue.KQueue;
 import io.netty.channel.nio.NioIoHandler;
-import io.netty.channel.uring.IoUring;
+import io.netty.incubator.channel.uring.IOUring;
 import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.condition.EnabledForJreRange;
 import org.junit.jupiter.api.condition.EnabledOnJre;
 import org.junit.jupiter.api.condition.EnabledOnOs;
 import org.junit.jupiter.api.condition.JRE;
@@ -210,22 +209,12 @@ void testEpollIsAvailable() {
 		assertThat(Epoll.isAvailable()).isTrue();
 	}
 
-	@Test
-	@EnabledOnOs(OS.LINUX)
-	@EnabledForJreRange(min = JRE.JAVA_11)
-	void testIoUringIsAvailable() {
-		boolean isTransportIoUring = "io_uring".equals(System.getProperty("forceTransport"));
-		assumeThat(isTransportIoUring).isTrue();
-		assertThat(IoUring.isAvailable()).isTrue();
-	}
-
 	@Test
 	@EnabledOnOs(OS.LINUX)
 	@EnabledOnJre(JRE.JAVA_8)
 	void testIoUringIncubatorIsAvailableOnJava8() {
-		boolean isTransportIoUring = "io_uring".equals(System.getProperty("forceTransport"));
-		assumeThat(isTransportIoUring).isTrue();
-		assertThat(io.netty.incubator.channel.uring.IOUring.isAvailable()).isTrue();
+		assumeThat(System.getProperty("forceTransport")).isEqualTo("io_uring");
+		assertThat(IOUring.isAvailable()).isTrue();
 	}
 
 	@Test

reactor-netty-core/src/test/java11/reactor/netty/resources/LoopResourcesTest.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2026 VMware, Inc. or its affiliates, All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package reactor.netty.resources;
+
+import io.netty.channel.uring.IoUring;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledOnOs;
+import org.junit.jupiter.api.condition.OS;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assumptions.assumeThat;
+
+class LoopResourcesTest {
+
+	@Test
+	@EnabledOnOs(OS.LINUX)
+	void testIoUringIsAvailable() {
+		assumeThat(System.getProperty("forceTransport")).isEqualTo("io_uring");
+		assertThat(IoUring.isAvailable()).isTrue();
+	}
+}

reactor-netty-http/build.gradle

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2025 VMware, Inc. or its affiliates, All Rights Reserved.
+ * Copyright (c) 2020-2026 VMware, Inc. or its affiliates, All Rights Reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -89,11 +89,6 @@ dependencies {
 	//on the other hand, if we want to make transport-specific tests, we'll make all
 	// native optional at compile time and add correct native/nio to testRuntime
 	if (project.hasProperty("forceTransport")) {
-		//so that the main code compiles
-		compileOnly "io.netty:netty-transport-native-epoll:$nettyVersion"
-		compileOnly "io.netty:netty-transport-native-kqueue:$nettyVersion"
-		compileOnly "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
-		compileOnly "io.netty:netty-transport-native-io_uring:$nettyVersion"
 		//now we explicitly add correctly qualified native, or do nothing if we want to test NIO
 		if (forceTransport == "native") {
 			if (osdetector.os == "osx") {
@@ -113,9 +108,6 @@ dependencies {
 	else {
 		//classic build to be distributed
 		api "io.netty:netty-transport-native-epoll:$nettyVersion:linux-x86_64"
-		compileOnly "io.netty:netty-transport-native-kqueue:$nettyVersion"
-		compileOnly "io.netty.incubator:netty-incubator-transport-native-io_uring:$nettyIoUringVersion"
-		compileOnly "io.netty:netty-transport-native-io_uring:$nettyVersion"
 	}
 
 	//Metrics