Merge branch 'main' into 3.1.x

tests/common/src/main/java/org/springframework/cloud/sleuth/instrument/messaging/TraceFunctionAroundWrapperTests.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2021-2021 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.sleuth.instrument.messaging;
+
+import java.util.function.Function;
+import java.util.function.Supplier;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.cloud.function.context.FunctionCatalog;
+import org.springframework.cloud.function.context.catalog.SimpleFunctionRegistry.FunctionInvocationWrapper;
+import org.springframework.cloud.sleuth.test.TestSpanHandler;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.messaging.Message;
+import org.springframework.messaging.support.MessageBuilder;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Oleg Zhurakousky
+ *
+ */
+public abstract class TraceFunctionAroundWrapperTests {
+
+	@Test
+	public void test_tracing_with_supplier() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(configuration(),
+				SampleConfiguration.class).run("--logging.level.org.springframework.cloud.function=DEBUG",
+						"--spring.main.lazy-initialization=true");) {
+			TestSpanHandler spanHandler = context.getBean(TestSpanHandler.class);
+			assertThat(spanHandler.reportedSpans()).isEmpty();
+			FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
+			FunctionInvocationWrapper function = catalog.lookup("greeter");
+			function.setSkipOutputConversion(true);
+			Message<?> result = (Message<?>) function.get();
+			assertThat(result.getPayload()).isEqualTo("hello");
+			assertThat(spanHandler.reportedSpans().size()).isEqualTo(2);
+			assertThat(((String) result.getHeaders().get("b3"))).contains(spanHandler.get(0).getTraceId());
+		}
+	}
+
+	@Test
+	public void test_tracing_with_function() {
+		try (ConfigurableApplicationContext context = new SpringApplicationBuilder(configuration(),
+				SampleConfiguration.class).run("--logging.level.org.springframework.cloud.function=DEBUG",
+						"--spring.main.lazy-initialization=true");) {
+			TestSpanHandler spanHandler = context.getBean(TestSpanHandler.class);
+			assertThat(spanHandler.reportedSpans()).isEmpty();
+			FunctionCatalog catalog = context.getBean(FunctionCatalog.class);
+			FunctionInvocationWrapper function = catalog.lookup("uppercase");
+			function.setSkipOutputConversion(true);
+			Message<?> result = (Message<?>) function.apply(MessageBuilder.withPayload("hello").build());
+			assertThat(result.getPayload()).isEqualTo("HELLO");
+			assertThat(spanHandler.reportedSpans().size()).isEqualTo(3);
+			assertThat(((String) result.getHeaders().get("b3"))).contains(spanHandler.get(0).getTraceId());
+		}
+	}
+
+	protected abstract Class<?> configuration();
+
+	@EnableAutoConfiguration
+	public static class SampleConfiguration {
+
+		@Bean
+		public Supplier<String> greeter() {
+			return () -> "hello";
+		}
+
+		@Bean
+		public Function<String, String> uppercase() {
+			return v -> v.toUpperCase();
+		}
+
+	}
+
+};