feat: add IntegrationTest template to SpringSDK archetype (#1147)

Author: octonato

maven-java/kalix-spring-boot-archetype/src/main/resources/META-INF/maven/archetype-metadata.xml

@@ -12,6 +12,12 @@
                 <include>**/*</include>
             </includes>
         </fileSet>
+        <fileSet filtered="true">
+            <directory>src/it/java</directory>
+            <includes>
+                <include>**/*</include>
+            </includes>
+        </fileSet>
         <fileSet filtered="true" encoding="UTF-8">
             <directory/>
             <includes>

maven-java/kalix-spring-boot-archetype/src/main/resources/archetype-resources/pom.xml

@@ -278,7 +278,7 @@
     </dependency>
     <dependency>
       <groupId>io.kalix</groupId>
-      <artifactId>kalix-java-sdk-testkit</artifactId>
+      <artifactId>kalix-spring-sdk-testkit</artifactId>
       <version>${kalix-sdk.version}</version>
       <scope>test</scope>
     </dependency>
@@ -296,6 +296,12 @@
       <version>5.5.2</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <version>5.5.2</version>
+      <scope>test</scope>
+    </dependency>
 
   </dependencies>
 </project>

maven-java/kalix-spring-boot-archetype/src/main/resources/archetype-resources/src/it/java/__packageInPathFormat__/IntegrationTest.java

@@ -0,0 +1,36 @@
+package ${package};
+
+import ${package}.Main;
+import kalix.springsdk.testkit.KalixIntegrationTestKitSupport;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.reactive.function.client.WebClient;
+
+
+/**
+ * This is a skeleton for implmenting integration tests for a Kalix application built with the Spring SDK.
+ *
+ * This test will initiate a Kalix Proxy using testcontainers and therefore it's required to have Docker installed
+ * on your machine. This test will also start your Spring Boot application.
+ *
+ * Since this is an integration tests, it interacts with the application using a WebClient
+ * (already configured and provided automatically through injection).
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = Main.class)
+public class IntegrationTest extends KalixIntegrationTestKitSupport {
+
+  @Autowired
+  private WebClient webClient;
+
+  @Test
+  public void test() throws Exception {
+    // implement your integration tests here by calling your
+    // REST endpoints using the provided WebClient
+  }
+}