test(web): add Retrofit2ServiceFactoryTest to test the creation of re…

…trofit2 client using Retrofit2ServiceFactory (#1221)

kork-retrofit2/kork-retrofit2.gradle

@@ -9,11 +9,13 @@ dependencies {
   implementation "com.squareup.okhttp3:logging-interceptor"
   implementation "io.zipkin.brave:brave-instrumentation-okhttp3"
 
+  testImplementation project(":kork-retrofit")
   testImplementation "org.springframework.boot:spring-boot-starter-test"
   testRuntimeOnly "cglib:cglib-nodep"
   testRuntimeOnly "org.objenesis:objenesis"
 
   testImplementation "com.squareup.okhttp3:mockwebserver"
   testImplementation "com.squareup.retrofit2:retrofit-mock"
+  testImplementation "com.github.tomakehurst:wiremock-jre8"
 
 }

kork-retrofit2/src/test/java/com/netflix/spinnaker/kork/retrofit/Retrofit2ServiceFactoryTest.java

@@ -0,0 +1,148 @@
+/*
+ * Copyright 2025 OpsMx, Inc.
+ *
+ * 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
+ *
+ *   http://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 com.netflix.spinnaker.kork.retrofit;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.equalTo;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.getRequestedFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static com.github.tomakehurst.wiremock.client.WireMock.verify;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.tomakehurst.wiremock.WireMockServer;
+import com.github.tomakehurst.wiremock.client.WireMock;
+import com.github.tomakehurst.wiremock.core.WireMockConfiguration;
+import com.netflix.spinnaker.config.DefaultServiceClientProvider;
+import com.netflix.spinnaker.config.DefaultServiceEndpoint;
+import com.netflix.spinnaker.config.ServiceEndpoint;
+import com.netflix.spinnaker.config.okhttp3.DefaultOkHttpClientBuilderProvider;
+import com.netflix.spinnaker.config.okhttp3.OkHttpClientProvider;
+import com.netflix.spinnaker.kork.client.ServiceClientFactory;
+import com.netflix.spinnaker.kork.client.ServiceClientProvider;
+import com.netflix.spinnaker.okhttp.OkHttpClientConfigurationProperties;
+import java.util.List;
+import java.util.Map;
+import okhttp3.Interceptor;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import retrofit2.Call;
+import retrofit2.http.GET;
+
+@SpringBootTest(
+    webEnvironment = SpringBootTest.WebEnvironment.NONE,
+    classes = {
+      OkHttpClient.class,
+      OkHttpClientConfigurationProperties.class,
+      OkHttpClientProvider.class,
+      Retrofit2ServiceFactoryAutoConfiguration.class,
+      Retrofit2ServiceFactoryTest.Retrofit2TestConfig.class,
+      DefaultOkHttpClientBuilderProvider.class
+    })
+public class Retrofit2ServiceFactoryTest {
+
+  @Autowired ServiceClientProvider serviceClientProvider;
+
+  static int port;
+  static WireMockServer wireMockServer;
+
+  @BeforeAll
+  static void setUp() {
+    wireMockServer = new WireMockServer(WireMockConfiguration.options().dynamicPort());
+    wireMockServer.start();
+    port = wireMockServer.port();
+    WireMock.configureFor("localhost", port);
+  }
+
+  @AfterAll
+  static void tearDown() {
+    wireMockServer.stop();
+  }
+
+  @Test
+  void testRetrofit2Client() {
+    stubFor(
+        get(urlEqualTo("/test"))
+            .willReturn(
+                aResponse()
+                    .withHeader("Content-Type", "application/json")
+                    .withBody("{\"message\": \"success\", \"code\": 200}")));
+
+    ServiceEndpoint serviceEndpoint =
+        new DefaultServiceEndpoint("retrofit2service", "http://localhost:" + port);
+    Retrofit2TestService retrofit2TestService =
+        serviceClientProvider.getService(Retrofit2TestService.class, serviceEndpoint);
+    Map<String, String> response = Retrofit2SyncCall.execute(retrofit2TestService.getSomething());
+
+    assertEquals(response.get("message"), "success");
+  }
+
+  @Test
+  void testRetrofit2Client_withInterceptor() {
+
+    Interceptor interceptor =
+        chain -> {
+          Request originalRequest = chain.request();
+          Request modifiedRequest =
+              originalRequest.newBuilder().header("Authorization", "Bearer my-token").build();
+          return chain.proceed(modifiedRequest);
+        };
+
+    stubFor(
+        get(urlEqualTo("/test"))
+            .willReturn(
+                aResponse()
+                    .withHeader("Content-Type", "application/json")
+                    .withBody("{\"message\": \"success\", \"code\": 200}")));
+
+    ServiceEndpoint serviceEndpoint =
+        new DefaultServiceEndpoint("retrofit2service", "http://localhost:" + port);
+    Retrofit2TestService retrofit2TestService =
+        serviceClientProvider.getService(
+            Retrofit2TestService.class, serviceEndpoint, new ObjectMapper(), List.of(interceptor));
+    Retrofit2SyncCall.execute(retrofit2TestService.getSomething());
+
+    verify(
+        getRequestedFor(urlEqualTo("/test"))
+            .withHeader("Authorization", equalTo("Bearer my-token")));
+  }
+
+  @Configuration
+  public static class Retrofit2TestConfig {
+
+    @Bean
+    public ServiceClientProvider serviceClientProvider(
+        List<ServiceClientFactory> serviceClientFactories) {
+      return new DefaultServiceClientProvider(serviceClientFactories, new ObjectMapper());
+    }
+  }
+
+  public interface Retrofit2TestService {
+
+    @GET("test")
+    Call<Map<String, String>> getSomething();
+  }
+}