Simplify extensions class names concatenation

Author: bitxon

pom.xml

@@ -146,6 +146,11 @@
                   <version>0.4.1</version>
                   <classifier>jar-with-dependencies</classifier>
                 </artifactItem>
+                <dependency>
+                  <groupId>org.wiremock</groupId>
+                  <artifactId>wiremock-webhooks-extension</artifactId>
+                  <version>2.35.0</version>
+                </dependency>
               </artifactItems>
               <outputDirectory>${project.build.directory}/test-wiremock-extension</outputDirectory>
             </configuration>

src/main/java/org/wiremock/integrations/testcontainers/WireMockContainer.java

@@ -211,11 +211,7 @@ protected void configure() {
         }
         if (!extensionClassNames.isEmpty()) {
             wireMockArgs.append(" --extensions ");
-            int counter = 0;
-            for (String className : extensionClassNames) {
-                wireMockArgs.append(className);
-                wireMockArgs.append( (++counter != extensionClassNames.size()) ? ',' : ' ');
-            }
+            wireMockArgs.append(String.join(",", extensionClassNames));
         }
 
         // Add CLI arguments

src/test/java/org/wiremock/integrations/testcontainers/WireMockContainerExtensionTest.java

@@ -43,7 +43,11 @@ public class WireMockContainerExtensionTest {
     public WireMockContainer wiremockServer = new WireMockContainer("2.35.0")
             .withStartupTimeout(Duration.ofSeconds(60))
             .withMapping("json-body-transformer", WireMockContainerExtensionTest.class, "json-body-transformer.json")
-            .withExtension("JSON Body Transformer", Collections.singleton("com.ninecookies.wiremock.extensions.JsonBodyTransformer"),
+            .withExtension("Webhook",
+                    Collections.singleton("org.wiremock.webhooks.Webhooks"),
+                    Collections.singleton(Paths.get("target", "test-wiremock-extension", "wiremock-webhooks-extension-2.35.0.jar").toFile()))
+            .withExtension("JSON Body Transformer",
+                    Collections.singleton("com.ninecookies.wiremock.extensions.JsonBodyTransformer"),
                     Collections.singleton(Paths.get("target", "test-wiremock-extension", "wiremock-extensions-0.4.1-jar-with-dependencies.jar").toFile()));
 
     @Before