Reduce use of SocketUtils in tests

Resolves #825

spring-cloud-function-adapters/spring-cloud-function-adapter-gcp/src/test/java/org/springframework/cloud/function/adapter/gcp/integration/LocalServerTestSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2020 the original author or authors.
+ * Copyright 2020-2022 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.
@@ -27,7 +27,6 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
@@ -50,6 +49,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  *
  * @author Daniel Zou
  * @author Mike Eltsufin
+ * @author Chris Bono
  */
 final public class LocalServerTestSupport {
 
@@ -82,10 +82,7 @@ final public class LocalServerTestSupport {
 		}
 	}
 
-	static ServerProcess startServer(Class<?> springApplicationMainClass, String function)
-			throws InterruptedException, IOException {
-		int port = SocketUtils.findAvailableTcpPort();
-
+	static ServerProcess startServer(Class<?> springApplicationMainClass, String function) throws IOException {
 		String signatureType = "http";
 		String target = FunctionInvoker.class.getCanonicalName();
 
@@ -102,7 +99,7 @@ final public class LocalServerTestSupport {
 
 		ProcessBuilder processBuilder = new ProcessBuilder().command(command).redirectErrorStream(true);
 		Map<String, String> environment = new HashMap<>();
-		environment.put("PORT", String.valueOf(port));
+		environment.put("PORT", String.valueOf(0));
 		environment.put("K_SERVICE", "test-function");
 		environment.put("FUNCTION_SIGNATURE_TYPE", signatureType);
 		environment.put("FUNCTION_TARGET", target);
@@ -112,28 +109,28 @@ final public class LocalServerTestSupport {
 		}
 		processBuilder.environment().putAll(environment);
 		Process serverProcess = processBuilder.start();
-		CountDownLatch ready = new CountDownLatch(1);
-		StringBuilder output = new StringBuilder();
-		Future<?> outputMonitorResult = EXECUTOR
-				.submit(() -> monitorOutput(serverProcess.getInputStream(), ready, output));
-		boolean serverReady = ready.await(5, TimeUnit.SECONDS);
-		if (!serverReady) {
+		Future<Integer> outputMonitorResult = EXECUTOR.submit(() -> monitorOutput(serverProcess.getInputStream()));
+
+		int port;
+		try {
+			port = outputMonitorResult.get(5L, TimeUnit.SECONDS);
+		}
+		catch (Exception ex) {
 			serverProcess.destroy();
 			throw new AssertionError("Server never became ready");
 		}
-		return new ServerProcess(serverProcess, outputMonitorResult, output, port);
+		return new ServerProcess(serverProcess, port);
 	}
 
-	private static void monitorOutput(InputStream processOutput, CountDownLatch ready, StringBuilder output) {
+	private static Integer monitorOutput(InputStream processOutput) {
 		try (BufferedReader reader = new BufferedReader(new InputStreamReader(processOutput))) {
 			String line;
 			while ((line = reader.readLine()) != null) {
-				if (line.contains(SERVER_READY_STRING)) {
-					ready.countDown();
-				}
 				System.out.println(line);
-				synchronized (output) {
-					output.append(line).append('\n');
+				if (line.contains(SERVER_READY_STRING)) {
+					// Started ServerConnector@192b07fd{HTTP/1.1,[http/1.1]}{0.0.0.0:59259}
+					String portStr = line.substring(line.lastIndexOf(':') + 1, line.lastIndexOf('}'));
+					return Integer.parseInt(portStr);
 				}
 				if (line.contains("WARNING")) {
 					throw new AssertionError("Found warning in server output:\n" + line);
@@ -143,22 +140,17 @@ final public class LocalServerTestSupport {
 		catch (IOException e) {
 			throw new UncheckedIOException(e);
 		}
+		throw new RuntimeException("End of input stream and server never became ready");
 	}
 
 	static class ServerProcess implements AutoCloseable {
 
 		private final Process process;
 
-		private final Future<?> outputMonitorResult;
-
-		private final StringBuilder output;
-
 		private final int port;
 
-		ServerProcess(Process process, Future<?> outputMonitorResult, StringBuilder output, int port) {
+		ServerProcess(Process process, int port) {
 			this.process = process;
-			this.outputMonitorResult = outputMonitorResult;
-			this.output = output;
 			this.port = port;
 		}
 
@@ -166,7 +158,6 @@ final public class LocalServerTestSupport {
 			return process;
 		}
 
-
 		@Override
 		public void close() {
 			process().destroy();

spring-cloud-function-adapters/spring-cloud-function-grpc/src/main/java/org/springframework/cloud/function/grpc/GrpcServer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2021 the original author or authors.
+ * Copyright 2021-2022 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.
@@ -16,28 +16,34 @@
 
 package org.springframework.cloud.function.grpc;
 
+import java.util.Collections;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-import org.springframework.context.SmartLifecycle;
-import org.springframework.util.ClassUtils;
-
 import io.grpc.BindableService;
 import io.grpc.Server;
 import io.grpc.ServerBuilder;
 import io.grpc.protobuf.services.ProtoReflectionService;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import org.springframework.context.EnvironmentAware;
+import org.springframework.context.SmartLifecycle;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.util.ClassUtils;
 
 /**
  *
  * @author Oleg Zhurakousky
  * @author Dave Syer
+ * @author Chris Bono
  *
  * @since 3.2
  *
  */
-class GrpcServer implements SmartLifecycle {
+class GrpcServer implements SmartLifecycle, EnvironmentAware {
 
 	private Log logger = LogFactory.getLog(GrpcServer.class);
 
@@ -49,6 +55,8 @@ class GrpcServer implements SmartLifecycle {
 
 	private Server server;
 
+	private Environment environment;
+
 	GrpcServer(FunctionGrpcProperties grpcProperties, BindableService[] grpcMessageServices) {
 		this.grpcProperties = grpcProperties;
 		this.grpcMessageServices = grpcMessageServices;
@@ -70,7 +78,12 @@ class GrpcServer implements SmartLifecycle {
 
 				logger.info("Starting gRPC server");
 				this.server.start();
-				logger.info("gRPC server is listening on port " + this.grpcProperties.getPort());
+				logger.info("gRPC server is listening on port " + this.server.getPort());
+
+				if (environment instanceof ConfigurableEnvironment) {
+					((ConfigurableEnvironment) this.environment).getPropertySources().addFirst(
+						new MapPropertySource("grpcServerProps", Collections.singletonMap("local.grpc.server.port", server.getPort())));
+				}
 			}
 			catch (Exception e) {
 				stop();
@@ -90,4 +103,9 @@ class GrpcServer implements SmartLifecycle {
 	public boolean isRunning() {
 		return this.server != null && !this.server.isShutdown();
 	}
+
+	@Override
+	public void setEnvironment(Environment environment) {
+		this.environment = environment;
+	}
 }

spring-cloud-function-adapters/spring-cloud-function-grpc/src/test/java/org/springframework/cloud/function/grpc/GrpcInteractionTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2021 the original author or authors.
+ * Copyright 2021-2022 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.
@@ -46,7 +46,7 @@ import static org.junit.jupiter.api.Assertions.fail;
 /**
  *
  * @author Oleg Zhurakousky
- *
+ * @author Chris Bono
  */
 @Disabled
 public class GrpcInteractionTests {
@@ -62,13 +62,14 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testRequestReply() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testRequestReply() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=uppercase",
-						"--spring.cloud.function.grpc.port=" + port)) {
+						"--spring.cloud.function.grpc.port=0")) {
+
+			int port = patientlyGetPort(context);
 
 			Message<byte[]> message = MessageBuilder.withPayload("\"hello gRPC\"".getBytes())
 					.setHeader("foo", "bar")
@@ -82,13 +83,14 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testRequestReplyWithMonoReturn() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testRequestReplyWithMonoReturn() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
-						"--spring.cloud.function.definition=uppercaseMonoReturn",
-						"--spring.cloud.function.grpc.port=" + port)) {
+						"--spring.cloud.function.definition=uppercaseMonoReturn", 
+						"--spring.cloud.function.grpc.port=0")) {
+
+			int port = patientlyGetPort(context);
 
 			Message<byte[]> message = MessageBuilder.withPayload("\"hello gRPC\"".getBytes())
 					.setHeader("foo", "bar")
@@ -102,14 +104,15 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testRequestReplyWithFluxReturn() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testRequestReplyWithFluxReturn() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=uppercaseFluxReturn",
-						"--spring.cloud.function.grpc.port=" + port)) {
+						"--spring.cloud.function.grpc.port=0")) {
 
+			int port = patientlyGetPort(context);
+			
 			Message<byte[]> message = MessageBuilder.withPayload("\"hello gRPC\"".getBytes())
 					.setHeader("foo", "bar")
 					.setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN)
@@ -125,13 +128,14 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testRequstReplyFunctionDefinitionInMessage() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testRequstReplyFunctionDefinitionInMessage() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
-						"--spring.cloud.function.grpc.port=" + port)) {
+						"--spring.cloud.function.grpc.port=0")) {
 
+			int port = patientlyGetPort(context);
+			
 			Message<byte[]> message = MessageBuilder.withPayload("\"hello gRPC\"".getBytes())
 					.setHeader("foo", "bar")
 					.setHeader("spring.cloud.function.definition", "reverse")
@@ -144,14 +148,15 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testBidirectionalStreamWithImperativeFunction() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testBidirectionalStreamWithImperativeFunction() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=uppercase",
-						"--spring.cloud.function.grpc.port=" + port)) {
+						"--spring.cloud.function.grpc.port=0")) {
 
+			int port = patientlyGetPort(context);
+			
 			List<Message<byte[]>> messages = new ArrayList<>();
 			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
 					.build());
@@ -172,15 +177,15 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testBidirectionalStreamWithReactiveFunction() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testBidirectionalStreamWithReactiveFunction() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=uppercaseReactive",
-						"--spring.cloud.function.grpc.port="
-								+ port)) {
+						"--spring.cloud.function.grpc.port=0")) {
 
+			int port = patientlyGetPort(context);
+			
 			List<Message<byte[]>> messages = new ArrayList<>();
 			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
 					.setHeader(MessageHeaders.CONTENT_TYPE, MimeTypeUtils.TEXT_PLAIN)
@@ -204,14 +209,14 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testClientStreaming() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testClientStreaming() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=streamInStringOut",
-						"--spring.cloud.function.grpc.port="
-								+ port)) {
+						"--spring.cloud.function.grpc.port=0")) {
+
+			int port = patientlyGetPort(context);
 
 			List<Message<byte[]>> messages = new ArrayList<>();
 			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
@@ -229,14 +234,14 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testServerStreaming() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testServerStreaming() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=stringInStreamOut",
-						"--spring.cloud.function.grpc.port="
-								+ port)) {
+						"--spring.cloud.function.grpc.port=0")) {
+
+			int port = patientlyGetPort(context);
 
 			Message<byte[]> message = MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar").build();
 
@@ -251,14 +256,14 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testBiStreamStreamInStringOutFailure() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testBiStreamStreamInStringOutFailure() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=streamInStringOut",
-						"--spring.cloud.function.grpc.port="
-								+ port)) {
+						"--spring.cloud.function.grpc.port=0")) {
+
+			int port = patientlyGetPort(context);
 
 			List<Message<byte[]>> messages = new ArrayList<>();
 			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
@@ -276,14 +281,14 @@ public class GrpcInteractionTests {
 	}
 
 	@Test
-	public void testBiStreamStringInStreamOutFailure() {
-		int port = SocketUtils.findAvailableTcpPort();
+	public void testBiStreamStringInStreamOutFailure() throws Exception {
 		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(
 				SampleConfiguration.class).web(WebApplicationType.NONE).run(
 						"--spring.jmx.enabled=false",
 						"--spring.cloud.function.definition=stringInStreamOut",
-						"--spring.cloud.function.grpc.port="
-								+ port)) {
+						"--spring.cloud.function.grpc.port=0")) {
+
+			int port = patientlyGetPort(context);
 
 			List<Message<byte[]>> messages = new ArrayList<>();
 			messages.add(MessageBuilder.withPayload("\"Ricky\"".getBytes()).setHeader("foo", "bar")
@@ -300,6 +305,17 @@ public class GrpcInteractionTests {
 		}
 	}
 
+	private int patientlyGetPort(ConfigurableApplicationContext context) throws InterruptedException {
+		Thread.sleep(500);
+		String port = context.getEnvironment().getProperty("local.grpc.server.port");
+		if (port == null) {
+			Thread.sleep(500);
+			port = context.getEnvironment().getProperty("local.grpc.server.port");
+			assertThat(port).as("Unable to get 'local.grpc.server.port' - server may not have started up").isNotNull();
+		}
+		return Integer.valueOf(port);
+	}
+
 	@EnableAutoConfiguration
 	public static class SampleConfiguration {
 

spring-cloud-function-rsocket/src/test/java/org/springframework/cloud/function/rsocket/MessageRoutingCallbackRSocketTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2021 the original author or authors.
+ * Copyright 2021-2022 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.
@@ -38,24 +38,25 @@ import org.springframework.util.MimeTypeUtils;
 /**
  *
  * @author Oleg Zhurakousky
- *
+ * @author Chris Bono
  */
 public class MessageRoutingCallbackRSocketTests {
 
 	@Test
 	public void testRoutingWithRoutingCallback() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(RoutingCallbackFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 							"--spring.cloud.function.expected-content-type=text/plain",
-							"--spring.rsocket.server.port=" + port);
+							"--spring.rsocket.server.port=0");
 		) {
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
+			int port = applicationContext.getEnvironment().getProperty("local.rsocket.server.port", Integer.class);
+
 			// imperative
 			rsocketRequesterBuilder.tcp("localhost", port)
 				.route("foo")

spring-cloud-function-rsocket/src/test/java/org/springframework/cloud/function/rsocket/MessagingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2021 the original author or authors.
+ * Copyright 2021-2022 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.
@@ -41,20 +41,21 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  *
  * @author Oleg Zhurakousky
- *
+ * @author Chris Bono
  */
 public class MessagingTests {
 
 	@Test
 	public void testPojoToStringViaMessage() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -76,14 +77,15 @@ public class MessagingTests {
 	@SuppressWarnings("rawtypes")
 	@Test
 	public void testPojoToStringViaMessageMap() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -107,14 +109,15 @@ public class MessagingTests {
 
 	@Test
 	public void testPojoToStringViaMessageExpectMessage() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -136,14 +139,15 @@ public class MessagingTests {
 
 	@Test
 	public void testPojoMessageToPojoViaMessage() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -167,14 +171,15 @@ public class MessagingTests {
 	@SuppressWarnings("rawtypes")
 	@Test
 	public void testPojoMessageToPojoViaMap() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -200,14 +205,15 @@ public class MessagingTests {
 
 	@Test
 	public void testPojoMessageToPojoViaMessageExpectMessage() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -229,14 +235,15 @@ public class MessagingTests {
 
 	@Test
 	public void testPojoMessageToPojoViaMessageExpectMessageRawPayload() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -258,14 +265,15 @@ public class MessagingTests {
 
 	@Test
 	public void testPojoMessageToPojoViaMessageExpectMessageStringPayload() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -287,14 +295,15 @@ public class MessagingTests {
 
 	@Test
 	public void testPojoToMessageMap() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(MessagingConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 			Person p = new Person();
@@ -311,7 +320,9 @@ public class MessagingTests {
 		}
 	}
 
-
+	private int getLocalRsocketPort(ConfigurableApplicationContext context) {
+		return context.getEnvironment().getProperty("local.rsocket.server.port", Integer.class);
+	}
 
 	@EnableAutoConfiguration
 	@Configuration

spring-cloud-function-rsocket/src/test/java/org/springframework/cloud/function/rsocket/RSocketAutoConfigurationRoutingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2021 the original author or authors.
+ * Copyright 2021-2022 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.
@@ -44,12 +44,12 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  *
  * @author Oleg Zhurakousky
+ * @author Chris Bono
  * @since 3.1
  */
 public class RSocketAutoConfigurationRoutingTests {
 	@Test
 	public void testRoutingWithRoute() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
@@ -57,8 +57,10 @@ public class RSocketAutoConfigurationRoutingTests {
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 							"--spring.cloud.function.routing-expression=headers.func_name",
 							"--spring.cloud.function.expected-content-type=text/plain",
-							"--spring.rsocket.server.port=" + port);
+							"--spring.rsocket.server.port=0");
 		) {
+			int port = applicationContext.getEnvironment().getProperty("local.rsocket.server.port", Integer.class);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -97,7 +99,6 @@ public class RSocketAutoConfigurationRoutingTests {
 
 	@Test
 	public void testRoutingWithDefinition() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
@@ -106,8 +107,10 @@ public class RSocketAutoConfigurationRoutingTests {
 							"--spring.cloud.function.definition=uppercase",
 							"--spring.cloud.function.routing-expression=headers.func_name",
 							"--spring.cloud.function.expected-content-type=text/plain",
-							"--spring.rsocket.server.port=" + port);
+							"--spring.rsocket.server.port=0");
 		) {
+			int port = applicationContext.getEnvironment().getProperty("local.rsocket.server.port", Integer.class);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -146,7 +149,6 @@ public class RSocketAutoConfigurationRoutingTests {
 
 	@Test
 	public void testRoutingWithDefinitionMessageFunction() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
@@ -155,8 +157,9 @@ public class RSocketAutoConfigurationRoutingTests {
 							"--spring.cloud.function.definition=uppercase",
 							"--spring.cloud.function.routing-expression=headers.func_name",
 							"--spring.cloud.function.expected-content-type=text/plain",
-							"--spring.rsocket.server.port=" + port);
+							"--spring.rsocket.server.port=0");
 		) {
+			int port = applicationContext.getEnvironment().getProperty("local.rsocket.server.port", Integer.class);
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 

spring-cloud-function-rsocket/src/test/java/org/springframework/cloud/function/rsocket/RSocketAutoConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2020 the original author or authors.
+ * Copyright 2020-2022 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.
@@ -48,20 +48,22 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  *
  * @author Oleg Zhurakousky
+ * @author Chris Bono
  * @since 3.1
  */
 public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testNonExistingFunctionInRoute() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -77,14 +79,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testNonExistingFunctionInRouteSingleFunctionInCatalog() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SingleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -103,15 +106,16 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testImperativeFunctionAsRequestReplyWithDefinition() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 						"--spring.cloud.function.definition=uppercase",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -129,15 +133,16 @@ public class RSocketAutoConfigurationTests {
 	@SuppressWarnings("unchecked")
 	@Test
 	public void testWithCborContentType() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 						"--spring.cloud.function.definition=uppercase",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -158,7 +163,6 @@ public class RSocketAutoConfigurationTests {
 	@Test
 	@Disabled
 	public void testImperativeFunctionAsRequestReplyWithDefinitionExplicitExpectedOutputCt() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
@@ -166,8 +170,10 @@ public class RSocketAutoConfigurationTests {
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 						"--spring.cloud.function.definition=uppercase",
 						"--spring.cloud.function.expected-content-type=application/json",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -184,14 +190,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testImperativeFunctionAsRequestReply() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -208,15 +215,16 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testWithRouteAndDefinition() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 							"--spring.cloud.function.definition=echo",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -233,14 +241,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testImperativeFunctionAsRequestReplyWithComposition() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -257,14 +266,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testSupplierAsRequestReply() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -281,14 +291,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testImperativeFunctionAsRequestStream() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -305,14 +316,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testImperativeFunctionAsRequestChannel() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -330,14 +342,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testReactiveFunctionAsRequestReply() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -354,14 +367,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testReactiveFunctionAsRequestStream() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -394,14 +408,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testReactiveFunctionAsRequestChannel() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -418,16 +433,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testRequestReplyFunctionWithDistributedComposition() {
-		int portA = SocketUtils.findAvailableTcpPort();
-		int portB = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 						"--spring.cloud.function.definition=uppercase|concat",
-						"--spring.rsocket.server.port=" + portA);
+						"--spring.rsocket.server.port=0");
 		) {
+			int portA = getLocalRsocketPort(applicationContext);
 
 			try (
 				ConfigurableApplicationContext applicationContext2 =
@@ -435,9 +449,11 @@ public class RSocketAutoConfigurationTests {
 						.web(WebApplicationType.NONE)
 						.run("--logging.level.org.springframework.cloud.function=DEBUG",
 							"--spring.cloud.function.definition=reverse>localhost:" + portA + "|wrap",
-							"--spring.rsocket.server.port=" + portB);
+							"--spring.rsocket.server.port=0");
 			) {
 
+				int portB = getLocalRsocketPort(applicationContext2);
+
 				RSocketRequester.Builder rsocketRequesterBuilder =
 					applicationContext2.getBean(RSocketRequester.Builder.class);
 
@@ -497,17 +513,17 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testFireAndForgetConsumer() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
 
 			SampleFunctionConfiguration config = applicationContext.getBean(SampleFunctionConfiguration.class);
 
+			int port = getLocalRsocketPort(applicationContext);
 
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
@@ -560,15 +576,16 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testRoutingWithRoutingFunction() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
 							"--spring.cloud.function.routing-expression=headers.function_definition",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -586,14 +603,15 @@ public class RSocketAutoConfigurationTests {
 
 	@Test
 	public void testByteArrayInOut() {
-		int port = SocketUtils.findAvailableTcpPort();
 		try (
 			ConfigurableApplicationContext applicationContext =
 				new SpringApplicationBuilder(SampleFunctionConfiguration.class)
 					.web(WebApplicationType.NONE)
 					.run("--logging.level.org.springframework.cloud.function=DEBUG",
-						"--spring.rsocket.server.port=" + port);
+						"--spring.rsocket.server.port=0");
 		) {
+			int port = getLocalRsocketPort(applicationContext);
+
 			RSocketRequester.Builder rsocketRequesterBuilder =
 				applicationContext.getBean(RSocketRequester.Builder.class);
 
@@ -615,6 +633,10 @@ public class RSocketAutoConfigurationTests {
 		}
 	}
 
+	private int getLocalRsocketPort(ConfigurableApplicationContext context) {
+		return context.getEnvironment().getProperty("local.rsocket.server.port", Integer.class);
+	}
+
 	@EnableAutoConfiguration
 	@Configuration
 	public static class SampleFunctionConfiguration {

spring-cloud-function-rsocket/src/test/java/org/springframework/cloud/function/rsocket/RoutingBrokerTests.java

@@ -29,7 +29,6 @@ import reactor.test.StepVerifier;
 import org.springframework.boot.WebApplicationType;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.builder.SpringApplicationBuilder;
-import org.springframework.cloud.function.utils.SocketUtils;
 import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -95,14 +94,14 @@ public class RoutingBrokerTests {
 	}
 
 	private void setup(boolean routingWithProperty) {
-		int brokerProxyPort = SocketUtils.findAvailableTcpPort();
-		int brokerClusterPort = SocketUtils.findAvailableTcpPort();
+		int brokerProxyPort = TestSocketUtils.findAvailableTcpPort();
+		int brokerClusterPort = TestSocketUtils.findAvailableTcpPort();
 		// start broker
 		brokerContext = new SpringApplicationBuilder(SimpleConfiguration.class).web(WebApplicationType.NONE).run(
 				"--logging.level.io.rsocket.broker=TRACE",
 				"--spring.cloud.function.rsocket.enabled=false",
 				"--io.rsocket.broker.client.enabled=false",
-				"--io.rsocket.broker.enabled=true",
+				"--io.rsocket.broker.enaFunctionEndpointInitializerbled=true",
 				"--io.rsocket.broker.uri=tcp://localhost:" + brokerProxyPort,
 				"--io.rsocket.broker.cluster.uri=tcp://localhost:" + brokerClusterPort);
 

spring-cloud-function-rsocket/src/test/java/org/springframework/cloud/function/rsocket/TestSocketUtils.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2022-2022 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.
+ * 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 org.springframework.cloud.function.rsocket;
+
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.util.Random;
+
+import javax.net.ServerSocketFactory;
+
+/**
+ * Simple test utility to find a random available TCP port.
+ * <p>Inspired by the now removed {@code org.springframework.util.SocketUtils} and is only used in a testing capacity.
+ *
+ * @author Chris Bono
+ * @deprecated will soon be removed or consolidated - do not use further
+ */
+@Deprecated
+public final class TestSocketUtils {
+
+	private static final Random random = new Random(System.nanoTime());
+
+	private TestSocketUtils() {
+	}
+
+	/**
+	 * Find an available TCP port randomly selected from the range {@code 1024-65535}.
+	 * @return an available TCP port number
+	 * @throws IllegalStateException if no available port could be found
+	 */
+	public static int findAvailableTcpPort() {
+		int minPort = 1024;
+		int maxPort = 65535;
+		int portRange = maxPort - minPort;
+		int candidatePort;
+		int searchCounter = 0;
+		do {
+			if (searchCounter > portRange) {
+				throw new IllegalStateException(String.format(
+					"Could not find an available TCP port after %d attempts", searchCounter));
+			}
+			candidatePort = minPort + random.nextInt(portRange + 1);
+			searchCounter++;
+		}
+		while (!isPortAvailable(candidatePort));
+
+		return candidatePort;
+	}
+
+	private static boolean isPortAvailable(int port) {
+		try {
+			ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(
+				port, 1, InetAddress.getByName("localhost"));
+			serverSocket.close();
+			return true;
+		}
+		catch (Exception ex) {
+			return false;
+		}
+	}
+}

spring-cloud-function-web/src/main/java/org/springframework/cloud/function/web/function/FunctionEndpointInitializer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -18,6 +18,7 @@ package org.springframework.cloud.function.web.function;
 
 import java.lang.management.ManagementFactory;
 import java.time.Duration;
+import java.util.Collections;
 import java.util.Set;
 import java.util.function.Function;
 
@@ -47,10 +48,12 @@ import org.springframework.cloud.function.web.util.FunctionWrapper;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ApplicationEvent;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.event.ContextRefreshedEvent;
 import org.springframework.context.event.SmartApplicationListener;
 import org.springframework.context.support.GenericApplicationContext;
 import org.springframework.core.env.Environment;
+import org.springframework.core.env.MapPropertySource;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.codec.ServerCodecConfigurer;
 import org.springframework.http.server.reactive.HttpHandler;
@@ -75,8 +78,8 @@ import static org.springframework.web.reactive.function.server.ServerResponse.st
 /**
  * @author Dave Syer
  * @author Oleg Zhurakousky
+ * @author Chris Bono
  * @since 2.0
- *
  */
 public class FunctionEndpointInitializer implements ApplicationContextInitializer<GenericApplicationContext> {
 
@@ -164,15 +167,19 @@ public class FunctionEndpointInitializer implements ApplicationContextInitialize
 				ReactorHttpHandlerAdapter adapter = new ReactorHttpHandlerAdapter(handler);
 				HttpServer httpServer = HttpServer.create().host(address).port(port).handle(adapter);
 				Thread thread = new Thread(
-						() -> httpServer.bindUntilJavaShutdown(Duration.ofSeconds(60), this::callback),
+						() -> httpServer.bindUntilJavaShutdown(Duration.ofSeconds(60), (server) -> callback(server, context)),
 						"server-startup");
 				thread.setDaemon(false);
 				thread.start();
 			}
 		}
 
-		private void callback(DisposableServer server) {
+		private void callback(DisposableServer server, ApplicationContext context) {
 			logger.info("HTTP server started on port: " + server.port());
+			if (context instanceof ConfigurableApplicationContext) {
+				((ConfigurableApplicationContext) context).getEnvironment().getPropertySources().addFirst(
+					new MapPropertySource("functionalServerProps", Collections.singletonMap("local.server.port", server.port())));
+			}
 			try {
 				double uptime = ManagementFactory.getRuntimeMXBean().getUptime();
 				logger.info("JVM running for " + uptime + "ms");

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/test/FunctionalExporterTests.java

@@ -34,7 +34,7 @@ import org.springframework.cloud.function.context.FunctionRegistration;
 import org.springframework.cloud.function.context.catalog.FunctionTypeUtils;
 import org.springframework.cloud.function.context.test.FunctionalSpringBootTest;
 import org.springframework.cloud.function.test.FunctionalExporterTests.ApplicationConfiguration;
-import org.springframework.cloud.function.utils.SocketUtils;
+import org.springframework.cloud.function.web.TestSocketUtils;
 import org.springframework.cloud.function.web.source.SupplierExporter;
 import org.springframework.context.ApplicationContextInitializer;
 import org.springframework.context.ConfigurableApplicationContext;
@@ -70,7 +70,7 @@ public class FunctionalExporterTests {
 	@BeforeAll
 	public static void init() throws Exception {
 		headers.clear();
-		String port = "" + SocketUtils.findAvailableTcpPort();
+		String port = "" + TestSocketUtils.findAvailableTcpPort();
 		System.setProperty("server.port", port);
 		System.setProperty("my.port", port);
 		context = SpringApplication.run(RestPojoConfiguration.class,

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/TestSocketUtils.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright 2022-2022 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.
+ * 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 org.springframework.cloud.function.web;
+
+import java.net.InetAddress;
+import java.net.ServerSocket;
+import java.util.Random;
+
+import javax.net.ServerSocketFactory;
+
+/**
+ * Simple test utility to find a random available TCP port.
+ * <p>Inspired by the now removed {@code org.springframework.util.SocketUtils} and is only used in a testing capacity.
+ *
+ * @author Chris Bono
+ * @deprecated will soon be removed or consolidated - do not use further
+ */
+@Deprecated
+public final class TestSocketUtils {
+
+	private static final Random random = new Random(System.nanoTime());
+
+	private TestSocketUtils() {
+	}
+
+	/**
+	 * Find an available TCP port randomly selected from the range {@code 1024-65535}.
+	 * @return an available TCP port number
+	 * @throws IllegalStateException if no available port could be found
+	 */
+	public static int findAvailableTcpPort() {
+		int minPort = 1024;
+		int maxPort = 65535;
+		int portRange = maxPort - minPort;
+		int candidatePort;
+		int searchCounter = 0;
+		do {
+			if (searchCounter > portRange) {
+				throw new IllegalStateException(String.format(
+					"Could not find an available TCP port after %d attempts", searchCounter));
+			}
+			candidatePort = minPort + random.nextInt(portRange + 1);
+			searchCounter++;
+		}
+		while (!isPortAvailable(candidatePort));
+
+		return candidatePort;
+	}
+
+	private static boolean isPortAvailable(int port) {
+		try {
+			ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(
+				port, 1, InetAddress.getByName("localhost"));
+			serverSocket.close();
+			return true;
+		}
+		catch (Exception ex) {
+			return false;
+		}
+	}
+}

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/function/FunctionEndpointInitializerMVCTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2019 the original author or authors.
+ * Copyright 2019-2022 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.
@@ -19,14 +19,12 @@ package org.springframework.cloud.function.web.function;
 import java.net.URI;
 import java.util.function.Function;
 
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.test.web.client.TestRestTemplate;
-import org.springframework.cloud.function.utils.SocketUtils;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.http.ResponseEntity;
 
@@ -35,27 +33,16 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  *
  * @author Oleg Zhurakousky
+ * @author Chris Bono
  * @since 2.1
- *
  */
 public class FunctionEndpointInitializerMVCTests {
 
-	@BeforeEach
-	public void init() throws Exception {
-		String port = "" + SocketUtils.findAvailableTcpPort();
-		System.setProperty("server.port", port);
-	}
-
-	@AfterEach
-	public void close() throws Exception {
-		System.clearProperty("server.port");
-	}
-
 	@Test
 	public void testSingleFunctionMapping() throws Exception {
-		SpringApplication.run(ApplicationConfiguration.class);
+		ConfigurableApplicationContext context = SpringApplication.run(ApplicationConfiguration.class, "--server.port=0");
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
+		String port = context.getEnvironment().getProperty("local.server.port");
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/uppercase"), "stressed", String.class);
 		assertThat(response.getBody()).isEqualTo("STRESSED");
@@ -65,9 +52,9 @@ public class FunctionEndpointInitializerMVCTests {
 
 	@Test
 	public void testCompositionFunctionMapping() throws Exception {
-		SpringApplication.run(ApplicationConfiguration.class);
+		ConfigurableApplicationContext context = SpringApplication.run(ApplicationConfiguration.class, "--server.port=0");
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
+		String port = context.getEnvironment().getProperty("local.server.port");
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/uppercase,lowercase,reverse"), "stressed", String.class);
 		assertThat(response.getBody()).isEqualTo("desserts");

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/function/FunctionEndpointInitializerTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2021 the original author or authors.
+ * Copyright 2019-2022 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.
@@ -21,8 +21,6 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.SpringBootConfiguration;
@@ -32,6 +30,7 @@ import org.springframework.cloud.function.context.FunctionalSpringApplication;
 import org.springframework.cloud.function.context.catalog.FunctionTypeUtils;
 import org.springframework.cloud.function.utils.SocketUtils;
 import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.support.GenericApplicationContext;
 import org.springframework.core.ResolvableType;
 import org.springframework.http.HttpStatus;
@@ -42,28 +41,15 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
 *
 * @author Oleg Zhurakousky
+* @author Chris Bono
 * @since 2.1
-*
 */
 public class FunctionEndpointInitializerTests {
 
-	@BeforeEach
-	public void init() throws Exception {
-		String port = "" + SocketUtils.findAvailableTcpPort();
-		System.setProperty("server.port", port);
-	}
-
-	@AfterEach
-	public void close() throws Exception {
-		System.clearProperty("server.port");
-	}
-
 	@Test
 	public void testNonExistingFunction() throws Exception {
-		FunctionalSpringApplication.run(ApplicationConfiguration.class);
+		int port = startServerAndWaitForPort(ApplicationConfiguration.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
-		Thread.sleep(200);
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/foo"), "stressed", String.class);
 		assertThat(response.getStatusCode()).isEqualTo(HttpStatus.NOT_FOUND);
@@ -71,10 +57,8 @@ public class FunctionEndpointInitializerTests {
 
 	@Test
 	public void testConsumerMapping() throws Exception {
-		FunctionalSpringApplication.run(ConsumerConfiguration.class);
+		int port = startServerAndWaitForPort(ConsumerConfiguration.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
-		Thread.sleep(200);
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/uppercase"), "stressed", String.class);
 		assertThat(response.getBody()).isNull();
@@ -83,10 +67,8 @@ public class FunctionEndpointInitializerTests {
 
 	@Test
 	public void testSingleFunctionMapping() throws Exception {
-		FunctionalSpringApplication.run(ApplicationConfiguration.class);
+		int port = startServerAndWaitForPort(ApplicationConfiguration.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
-		Thread.sleep(200);
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/uppercase"), "stressed", String.class);
 		assertThat(response.getBody()).isEqualTo("STRESSED");
@@ -96,10 +78,8 @@ public class FunctionEndpointInitializerTests {
 
 	@Test
 	public void testCompositionFunctionMapping() throws Exception {
-		FunctionalSpringApplication.run(ApplicationConfiguration.class);
+		int port = startServerAndWaitForPort(ApplicationConfiguration.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
-		Thread.sleep(200);
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/uppercase,lowercase,reverse"), "stressed", String.class);
 		assertThat(response.getBody()).isEqualTo("desserts");
@@ -107,10 +87,8 @@ public class FunctionEndpointInitializerTests {
 
 	@Test
 	public void testGetWithtFunction() throws Exception {
-		FunctionalSpringApplication.run(ApplicationConfiguration.class);
+		int port = startServerAndWaitForPort(ApplicationConfiguration.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
-		Thread.sleep(2000);
 		ResponseEntity<String> response = testRestTemplate
 				.getForEntity(new URI("http://localhost:" + port + "/reverse/stressed"), String.class);
 		System.out.println();
@@ -119,15 +97,25 @@ public class FunctionEndpointInitializerTests {
 
 	@Test
 	public void testGetWithtSupplier() throws Exception {
-		FunctionalSpringApplication.run(ApplicationConfiguration.class);
+		int port = startServerAndWaitForPort(ApplicationConfiguration.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
-		Thread.sleep(200);
 		ResponseEntity<String> response = testRestTemplate
 				.getForEntity(new URI("http://localhost:" + port + "/supplier"), String.class);
 		assertThat(response.getBody()).isEqualTo("Jim Lahey");
 	}
 
+	private int startServerAndWaitForPort(Class<?> primaryAppConfig) throws InterruptedException {
+		ConfigurableApplicationContext context = FunctionalSpringApplication.run(primaryAppConfig, "--server.port=0");
+		Thread.sleep(500);
+		String port = context.getEnvironment().getProperty("local.server.port");
+		if (port == null) {
+			Thread.sleep(500);
+			port = context.getEnvironment().getProperty("local.server.port");
+			assertThat(port).as("Unable to get 'local.server.port' - server may not have started up").isNotNull();
+		}
+		return Integer.valueOf(port);
+	}
+
 	@SpringBootConfiguration
 	protected static class ConsumerConfiguration
 			implements ApplicationContextInitializer<GenericApplicationContext> {

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/function/UserSubmittedTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2019 the original author or authors.
+ * Copyright 2019-2022 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.
@@ -19,14 +19,13 @@ package org.springframework.cloud.function.web.function;
 import java.net.URI;
 import java.util.function.Function;
 
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.test.web.client.TestRestTemplate;
 import org.springframework.cloud.function.utils.SocketUtils;
+import org.springframework.context.ConfigurableApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -36,27 +35,16 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  *
  * @author Oleg Zhurakousky
+ * @author Chris Bono
  * @since 2.1
- *
  */
 public class UserSubmittedTests {
 
-	@BeforeEach
-	public void init() throws Exception {
-		String port = "" + SocketUtils.findAvailableTcpPort();
-		System.setProperty("server.port", port);
-	}
-
-	@AfterEach
-	public void close() throws Exception {
-		System.clearProperty("server.port");
-	}
-
 	@Test
 	public void testIssue274() throws Exception {
-		SpringApplication.run(Issue274Configuration.class);
+		ConfigurableApplicationContext context = SpringApplication.run(Issue274Configuration.class, "--server.port=0");
+		int port = context.getEnvironment().getProperty("local.server.port", Integer.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
 		Thread.sleep(200);
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/echo"), "", String.class);
@@ -66,9 +54,9 @@ public class UserSubmittedTests {
 
 	@Test
 	public void testIssue274WithData() throws Exception {
-		SpringApplication.run(Issue274Configuration.class);
+		ConfigurableApplicationContext context = SpringApplication.run(Issue274Configuration.class, "--server.port=0");
+		int port = context.getEnvironment().getProperty("local.server.port", Integer.class);
 		TestRestTemplate testRestTemplate = new TestRestTemplate();
-		String port = System.getProperty("server.port");
 		Thread.sleep(200);
 		ResponseEntity<String> response = testRestTemplate
 				.postForEntity(new URI("http://localhost:" + port + "/echo"), "hello", String.class);

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/mvc/MultipartFileTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -20,8 +20,6 @@ import java.net.URI;
 import java.util.List;
 import java.util.function.Function;
 
-import org.junit.jupiter.api.AfterEach;
-import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.boot.SpringApplication;
@@ -44,27 +42,16 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  *
  * @author Oleg Zhurakousky
- *
+ * @author Chris Bono
  */
 public class MultipartFileTests {
 
-	@BeforeEach
-	public void init() throws Exception {
-		String port = "" + SocketUtils.findAvailableTcpPort();
-		System.setProperty("server.port", port);
-	}
-
-	@AfterEach
-	public void close() throws Exception {
-		System.clearProperty("server.port");
-	}
-
 	@Test
 	public void testMultipartFileUpload() throws Exception {
-		ApplicationContext context = SpringApplication.run(TestConfiguration.class);
+		ApplicationContext context = SpringApplication.run(TestConfiguration.class, "--server.port=0");
+		String port = context.getEnvironment().getProperty("local.server.port");
 		JsonMapper mapper = context.getBean(JsonMapper.class);
 		TestRestTemplate template = new TestRestTemplate();
-		String port = System.getProperty("server.port");
 
 		LinkedMultiValueMap<String, Object> map = new LinkedMultiValueMap<>();
 		map.add("file", new ClassPathResource("META-INF/spring.factories"));
@@ -81,10 +68,10 @@ public class MultipartFileTests {
 
 	@Test
 	public void testMultipartFilesUpload() throws Exception {
-		ApplicationContext context = SpringApplication.run(TestConfiguration.class);
+		ApplicationContext context = SpringApplication.run(TestConfiguration.class, "--server.port=0");
+		String port = context.getEnvironment().getProperty("local.server.port");
 		JsonMapper mapper = context.getBean(JsonMapper.class);
 		TestRestTemplate template = new TestRestTemplate();
-		String port = System.getProperty("server.port");
 
 		LinkedMultiValueMap<String, Object> map = new LinkedMultiValueMap<>();
 		map.add("fileA", new ClassPathResource("META-INF/spring.factories"));

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/source/FunctionAutoConfigurationIntegrationTests.java

@@ -34,7 +34,7 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.boot.test.context.TestConfiguration;
-import org.springframework.cloud.function.utils.SocketUtils;
+import org.springframework.cloud.function.web.TestSocketUtils;
 import org.springframework.cloud.function.web.source.FunctionAutoConfigurationIntegrationTests.ApplicationConfiguration;
 import org.springframework.cloud.function.web.source.FunctionAutoConfigurationIntegrationTests.RestConfiguration;
 import org.springframework.context.annotation.Bean;
@@ -68,7 +68,7 @@ public class FunctionAutoConfigurationIntegrationTests {
 
 	@BeforeAll
 	public static void init() {
-		System.setProperty("server.port", "" + SocketUtils.findAvailableTcpPort());
+		System.setProperty("server.port", "" + TestSocketUtils.findAvailableTcpPort());
 	}
 
 	@AfterAll

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/source/FunctionAutoConfigurationWithRetriesIntegrationTests.java

@@ -32,7 +32,7 @@ import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.boot.test.context.TestConfiguration;
-import org.springframework.cloud.function.utils.SocketUtils;
+import org.springframework.cloud.function.web.TestSocketUtils;
 import org.springframework.cloud.function.web.source.FunctionAutoConfigurationWithRetriesIntegrationTests.ApplicationConfiguration;
 import org.springframework.cloud.function.web.source.FunctionAutoConfigurationWithRetriesIntegrationTests.RestConfiguration;
 import org.springframework.context.annotation.Bean;
@@ -65,7 +65,7 @@ public class FunctionAutoConfigurationWithRetriesIntegrationTests {
 
 	@BeforeAll
 	public static void init() {
-		System.setProperty("server.port", "" + SocketUtils.findAvailableTcpPort());
+		System.setProperty("server.port", "" + TestSocketUtils.findAvailableTcpPort());
 	}
 
 	@AfterAll

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/web/source/WebAppIntegrationTests.java

@@ -36,6 +36,7 @@ import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.boot.test.context.TestConfiguration;
 import org.springframework.cloud.function.utils.SocketUtils;
 import org.springframework.cloud.function.web.RestApplication;
+import org.springframework.cloud.function.web.TestSocketUtils;
 import org.springframework.cloud.function.web.source.WebAppIntegrationTests.ApplicationConfiguration;
 import org.springframework.context.annotation.Bean;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -66,7 +67,7 @@ public class WebAppIntegrationTests {
 
 	@BeforeAll
 	public static void init() {
-		System.setProperty("server.port", "" + SocketUtils.findAvailableTcpPort());
+		System.setProperty("server.port", "" + TestSocketUtils.findAvailableTcpPort());
 	}
 
 	@AfterAll