BAEL-5234 - Apache Camel Routes Testing in Spring Boot (#11925)

* BAEL-4706 - Spring Boot with Spring Batch

* BAEL-3948 - Fix test(s) in spring-batch which leaves repository.sqlite
changed

* BAEL-4736 - Convert JSONArray to List of Object using camel-jackson

* BAEL-4756 - Mockito MockSettings

* BAEL-4756 - Mockito MockSettings - fix spelling

* BAEL-2674 - Upgrade the Okhttp article

* BAEL-4204 - Adding Interceptors in OkHTTP

* BAEL-4836 - Mocking Static Methods with Mockito

* BAEL-4205 - A Guide to Events in OkHTTP

* BAEL-5408 - Update Camel version in spring-boot-camel module

* BAEL-5234 - Apache Camel Routes Testing in Spring Boot

* BAEL-5234 - Apache Camel Routes Testing in Spring Boot

Co-authored-by: Jonathan Cook <jcook@sciops.esa.int>

spring-boot-modules/spring-boot-camel/.gitignore

@@ -0,0 +1 @@
+/output/

spring-boot-modules/spring-boot-camel/pom.xml

@@ -44,6 +44,12 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.apache.camel</groupId>
+            <artifactId>camel-test-spring-junit5</artifactId>
+            <version>${camel.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -57,6 +63,9 @@
                         <goals>
                             <goal>repackage</goal>
                         </goals>
+                        <configuration>
+                            <mainClass>com.baeldung.camel.boot.testing.GreetingsFileSpringApplication</mainClass>
+                        </configuration>
                     </execution>
                 </executions>
             </plugin>

spring-boot-modules/spring-boot-camel/src/main/java/com/baeldung/camel/boot/testing/GreetingsFileRouter.java

@@ -0,0 +1,19 @@
+package com.baeldung.camel.boot.testing;
+
+import org.apache.camel.builder.RouteBuilder;
+import org.springframework.stereotype.Component;
+
+@Component
+public class GreetingsFileRouter extends RouteBuilder {
+
+    @Override
+    public void configure() throws Exception {
+        
+        from("direct:start")
+            .routeId("greetings-route")
+            .setBody(constant("Hello Baeldung Readers!"))
+            .to("file:output");
+
+    }
+
+}

spring-boot-modules/spring-boot-camel/src/main/java/com/baeldung/camel/boot/testing/GreetingsFileSpringApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.camel.boot.testing;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class GreetingsFileSpringApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(GreetingsFileSpringApplication.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-camel/src/test/java/com/baeldung/camel/boot/testing/GreetingsFileRouterUnitTest.java

@@ -0,0 +1,32 @@
+package com.baeldung.camel.boot.testing;
+
+import org.apache.camel.EndpointInject;
+import org.apache.camel.ProducerTemplate;
+import org.apache.camel.component.mock.MockEndpoint;
+import org.apache.camel.test.spring.junit5.CamelSpringBootTest;
+import org.apache.camel.test.spring.junit5.MockEndpoints;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+@CamelSpringBootTest
+@MockEndpoints("file:output")
+class GreetingsFileRouterUnitTest {
+
+    @Autowired
+    private ProducerTemplate template;
+
+    @EndpointInject("mock:file:output")
+    private MockEndpoint mock;
+
+    @Test
+    void whenSendBody_thenGreetingReceivedSuccessfully() throws InterruptedException {
+        mock.expectedBodiesReceived("Hello Baeldung Readers!");
+
+        template.sendBody("direct:start", null);
+
+        mock.assertIsSatisfied();
+    }
+
+}