Add an integration test for vertx.reuseNettyAllocators

pom.xml

@@ -755,6 +755,21 @@
               </additionalClasspathElements>
             </configuration>
           </execution>
+          <execution>
+            <id>reuse-netty-allocators</id>
+            <goals>
+              <goal>integration-test</goal>
+              <goal>verify</goal>
+            </goals>
+            <configuration>
+              <includes>
+                <include>io/vertx/it/ReuseNettyAllocatorsTest.java</include>
+              </includes>
+              <systemProperties>
+                <vertx.reuseNettyAllocators>true</vertx.reuseNettyAllocators>
+              </systemProperties>
+            </configuration>
+          </execution>
         </executions>
       </plugin>
 
@@ -986,4 +1001,4 @@
 
   </profiles>
 
-</project>
+</project>

src/test/java/io/vertx/core/buffer/impl/VertxByteBufAllocatorTest.java

@@ -19,13 +19,11 @@
 
 public class VertxByteBufAllocatorTest {
 
-
   @Test
   public void defaultShouldNotReuseExistingNettyPooledAllocators() {
     Assert.assertNull(System.getProperty("vertx.reuseNettyAllocators"));
     Assert.assertNotSame(PooledByteBufAllocator.DEFAULT, VertxByteBufAllocator.POOLED_ALLOCATOR);
     Assert.assertNotSame(ByteBufAllocator.DEFAULT, VertxByteBufAllocator.POOLED_ALLOCATOR);
     Assert.assertSame(ByteBufAllocator.DEFAULT, PooledByteBufAllocator.DEFAULT);
   }
-
 }

src/test/java/io/vertx/it/ReuseNettyAllocatorsTest.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2011-2024 Contributors to the Eclipse Foundation
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
+ * which is available at https://www.apache.org/licenses/LICENSE-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
+ */
+
+package io.vertx.it;
+
+import io.netty.buffer.ByteBufAllocator;
+import io.netty.buffer.PooledByteBufAllocator;
+import io.vertx.core.buffer.impl.VertxByteBufAllocator;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ReuseNettyAllocatorsTest {
+
+  @Test
+  public void testVertxAllocatorsReuseNettyAllocators() {
+    Assert.assertEquals("true", System.getProperty("vertx.reuseNettyAllocators"));
+    Assert.assertSame(PooledByteBufAllocator.DEFAULT, VertxByteBufAllocator.POOLED_ALLOCATOR);
+    Assert.assertSame(ByteBufAllocator.DEFAULT, VertxByteBufAllocator.POOLED_ALLOCATOR);
+    Assert.assertSame(ByteBufAllocator.DEFAULT, PooledByteBufAllocator.DEFAULT);
+  }
+}