Schema Registry Testing Improvements

- Allow Schema Registry to be optional when
   running unit tests.

Resolves https://github.com/spring-cloud/spring-cloud-stream/issues/2641

samples/spring-cloud-stream-schema-registry-integration/pom.xml

@@ -62,6 +62,21 @@
 			<artifactId>avro</artifactId>
 			<version>${avro.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-stream-test-binder</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.awaitility</groupId>
+			<artifactId>awaitility</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 	<repositories>

samples/spring-cloud-stream-schema-registry-integration/schema-registry-consumer-kafka/src/main/java/sample/consumer/ConsumerApplication.java

@@ -38,7 +38,7 @@ public class ConsumerApplication {
 
 	@Bean
 	public Consumer<Sensor> process()  {
-		return input -> logger.info("input: " + input);
+		return input -> logger.info("[INPUT-RECEIVED]: " + input);
 	}
 
 }

samples/spring-cloud-stream-schema-registry-integration/schema-registry-consumer-kafka/src/test/java/sample/consumer/ConsumerApplicationTests.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2023 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 sample.consumer;
+
+import com.example.Sensor;
+import org.awaitility.Awaitility;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.test.system.CapturedOutput;
+import org.springframework.boot.test.system.OutputCaptureExtension;
+import org.springframework.cloud.stream.binder.test.TestChannelBinderConfiguration;
+import org.springframework.cloud.stream.function.StreamBridge;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.util.MimeType;
+
+import java.time.Duration;
+import java.util.Random;
+import java.util.UUID;
+
+@ExtendWith(OutputCaptureExtension.class)
+public class ConsumerApplicationTests {
+
+	private static final int AWAIT_DURATION = 10;
+
+	@Test
+	void test(CapturedOutput output) {
+		try (ConfigurableApplicationContext context =
+				 new SpringApplicationBuilder(
+					 TestChannelBinderConfiguration
+						 .getCompleteConfiguration(ConsumerApplication.class))
+					 .web(WebApplicationType.NONE)
+					 .run(
+						"--spring.cloud.schema.avro.ignore-schema-registry-server=true"
+					 )
+		) {
+
+			StreamBridge streamBridge = context.getBean("streamBridgeUtils", StreamBridge.class);
+			Random random = new Random();
+			Sensor sensor = new Sensor();
+			sensor.setId(UUID.randomUUID() + "-v1");
+			sensor.setAcceleration(random.nextFloat() * 10);
+			sensor.setVelocity(random.nextFloat() * 100);
+			MimeType mimeType = new MimeType("application", "*+avro");
+			streamBridge.send("process-in-0", sensor, mimeType);
+
+			Awaitility.await().atMost(Duration.ofSeconds(AWAIT_DURATION))
+				.until(() -> output.toString().contains("[INPUT-RECEIVED]: {\"id\":"));
+		}
+	}
+}