Tweak sme TCP tests to minimize time and memory

**Auto-cherry-pick to `6.3.x` & `6.2.x`**

Author: artembilan

spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/connection/TcpNioConnectionReadTests.java

@@ -296,7 +296,7 @@ public void removeDeadConnection(TcpConnection connection) {
 	@Test
 	public void testReadCrLfOverflow() throws Exception {
 		ByteArrayCrLfSerializer serializer = new ByteArrayCrLfSerializer();
-		serializer.setMaxMessageSize(1024);
+		serializer.setMaxMessageSize(16);
 		final Semaphore semaphore = new Semaphore(0);
 		final List<TcpConnection> added = new ArrayList<>();
 		final List<TcpConnection> removed = new ArrayList<>();
@@ -332,14 +332,14 @@ public void removeDeadConnection(TcpConnection connection) {
 		whileOpen(semaphore, added);
 		assertThat(added.size()).isEqualTo(1);
 
-		assertThat(errorMessageLetch.await(10, TimeUnit.SECONDS)).isTrue();
+		assertThat(errorMessageLetch.await(20, TimeUnit.SECONDS)).isTrue();
 
 		assertThat(errorMessageRef.get().getMessage())
 				.satisfiesAnyOf(
-						s -> assertThat(s).contains("CRLF not found before max message length: 1024"),
+						s -> assertThat(s).contains("CRLF not found before max message length: 16"),
 						s -> assertThat(s).contains("Connection is closed"));
 
-		assertThat(semaphore.tryAcquire(10000, TimeUnit.MILLISECONDS)).isTrue();
+		assertThat(semaphore.tryAcquire(20, TimeUnit.SECONDS)).isTrue();
 		assertThat(removed).hasSizeGreaterThan(0);
 		scf.stop();
 		done.countDown();
@@ -531,9 +531,9 @@ public void removeDeadConnection(TcpConnection connection) {
 		scf.stop();
 	}
 
-	private void whileOpen(Semaphore semaphore, final List<TcpConnection> added)
+	private void whileOpen(Semaphore semaphore, List<TcpConnection> added)
 			throws InterruptedException {
-		assertThat(semaphore.tryAcquire(10000, TimeUnit.MILLISECONDS)).isTrue();
+		assertThat(semaphore.tryAcquire(20, TimeUnit.SECONDS)).isTrue();
 		with().pollInterval(Duration.ofMillis(50)).await("Failed to close socket")
 				.atMost(Duration.ofSeconds(20))
 				.until(() -> !added.get(0).isOpen());

spring-integration-ip/src/test/java/org/springframework/integration/ip/tcp/serializer/DeserializationTests.java

@@ -28,8 +28,7 @@
 
 import javax.net.ServerSocketFactory;
 
-import org.junit.Rule;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import org.springframework.beans.factory.BeanFactory;
 import org.springframework.core.serializer.DefaultDeserializer;
@@ -42,12 +41,12 @@
 import org.springframework.integration.ip.util.SocketTestUtils;
 import org.springframework.integration.ip.util.TestingUtilities;
 import org.springframework.integration.support.MessageBuilder;
-import org.springframework.integration.test.support.LongRunningIntegrationTest;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.MessageChannel;
 import org.springframework.messaging.support.GenericMessage;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatIOException;
 import static org.assertj.core.api.Assertions.fail;
 import static org.mockito.Mockito.mock;
 
@@ -60,9 +59,6 @@
  */
 public class DeserializationTests {
 
-	@Rule
-	public LongRunningIntegrationTest longRunningIntegrationTest = new LongRunningIntegrationTest();
-
 	@Test
 	public void testReadLength() throws Exception {
 		ServerSocket server = ServerSocketFactory.getDefault().createServerSocket(0);
@@ -240,17 +236,11 @@ public void testReadCrLfTimeout() throws Exception {
 		server.setSoTimeout(10000);
 		CountDownLatch latch = SocketTestUtils.testSendCrLfOverflow(port);
 		Socket socket = server.accept();
-		socket.setSoTimeout(500);
+		socket.setSoTimeout(100);
 		ByteArrayCrLfSerializer serializer = new ByteArrayCrLfSerializer();
-		try {
-			serializer.deserialize(socket.getInputStream());
-			fail("Expected timout exception");
-		}
-		catch (IOException e) {
-			if (!e.getMessage().startsWith("Read timed out")) {
-				fail("Unexpected IO Error:" + e.getMessage());
-			}
-		}
+		assertThatIOException()
+				.isThrownBy(() -> serializer.deserialize(socket.getInputStream()))
+				.withMessageStartingWith("Read timed out");
 		server.close();
 		latch.countDown();
 	}
@@ -264,16 +254,10 @@ public void testReadCrLfOverflow() throws Exception {
 		Socket socket = server.accept();
 		socket.setSoTimeout(5000);
 		ByteArrayCrLfSerializer serializer = new ByteArrayCrLfSerializer();
-		serializer.setMaxMessageSize(1024);
-		try {
-			serializer.deserialize(socket.getInputStream());
-			fail("Expected message length exceeded exception");
-		}
-		catch (IOException e) {
-			if (!e.getMessage().startsWith("CRLF not found")) {
-				fail("Unexpected IO Error:" + e.getMessage());
-			}
-		}
+		serializer.setMaxMessageSize(16);
+		assertThatIOException()
+				.isThrownBy(() -> serializer.deserialize(socket.getInputStream()))
+				.withMessageStartingWith("CRLF not found");
 		server.close();
 		latch.countDown();
 	}
@@ -306,7 +290,8 @@ public void deserializationEvents() {
 		assertThat(new String(event.getBuffer()).substring(0, 1)).isEqualTo(new String(new byte[] {7}));
 		doDeserialize(new ByteArrayLfSerializer(), "Terminator '0xa' not found before max message length: 5");
 		doDeserialize(new ByteArrayRawSerializer(), "Socket was not closed before max message length: 5");
-		doDeserialize(new ByteArraySingleTerminatorSerializer((byte) 0xfe), "Terminator '0xfe' not found before max message length: 5");
+		doDeserialize(new ByteArraySingleTerminatorSerializer((byte) 0xfe),
+				"Terminator '0xfe' not found before max message length: 5");
 		doDeserialize(new ByteArrayStxEtxSerializer(), "Expected STX to begin message");
 		event = doDeserialize(new ByteArrayStxEtxSerializer(),
 				"Socket closed during message assembly", new byte[] {0x02, 0, 0}, 5);
@@ -365,7 +350,7 @@ private void testTimeoutWhileDecoding(AbstractByteArraySerializer deserializer,
 		TcpNioClientConnectionFactory clientNio = new TcpNioClientConnectionFactory("localhost", serverNio.getPort());
 		clientNio.setSerializer(serializer);
 		clientNio.setDeserializer(deserializer);
-		clientNio.setSoTimeout(1000);
+		clientNio.setSoTimeout(500);
 		clientNio.afterPropertiesSet();
 		final TcpOutboundGateway out = new TcpOutboundGateway();
 		out.setConnectionFactory(clientNio);

spring-integration-ip/src/test/java/org/springframework/integration/ip/util/SocketTestUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -325,16 +325,15 @@ public static CountDownLatch testSendCrLfOverflow(final int port) {
 		Thread thread = new Thread(() -> {
 			try (Socket socket = new Socket(InetAddress.getLocalHost(), port)) {
 				OutputStream outputStream = socket.getOutputStream();
-				for (int i = 0; i < 1500; i++) {
+				for (int i = 0; i < 20; i++) {
 					writeByte(outputStream, 'x', true);
 				}
-				testCompleteLatch.await(10, TimeUnit.SECONDS);
+				testCompleteLatch.await(30, TimeUnit.SECONDS);
 			}
 			catch (Exception e) {
 
 			}
 		});
-		thread.setDaemon(true);
 		thread.start();
 		return testCompleteLatch;
 	}