Ad initial support for propagating metadata as Message headers

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

@@ -34,9 +34,9 @@ import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
 import org.springframework.messaging.rsocket.RSocketRequester;
+import org.springframework.util.Assert;
 import org.springframework.util.SocketUtils;
 
-
 /**
  *
  * @author Oleg Zhurakousky
@@ -61,6 +61,28 @@ public class RSocketAutoConfigurationTests {
 			.verify();
 	}
 
+	@Test
+	public void testImperativeFunctionAsRequestReplyWithMetadata() throws Exception {
+		int port = SocketUtils.findAvailableTcpPort();
+		ApplicationContext context = 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);
+
+		RSocketRequester requester = context.getBean(RSocketRequester.class);
+		Mono<String> result = requester.rsocket().requestResponse(DefaultPayload.create("\"hello\"", "{\"name\":\"bob\", \"age\":23}"))
+				.map(payload -> {
+					Assert.hasText(payload.getMetadataUtf8(), "Metadata must not be null");
+					return payload.getDataUtf8();
+				});
+
+		StepVerifier
+			.create(result)
+			.expectNext("\"HELLO\"")
+			.expectComplete()
+			.verify();
+	}
+
 	@Test
 	public void testImperativeFunctionAsRequestStream() throws Exception {
 		int port = SocketUtils.findAvailableTcpPort();