Add Integration tests.

Author: OlgaMaciaszek

spring-cloud-commons/src/test/java/org/springframework/cloud/client/loadbalancer/LoadBalancedRestClientIntegrationTests.java

@@ -16,7 +16,6 @@
 
 package org.springframework.cloud.client.loadbalancer;
 
-import java.io.IOException;
 import java.net.URI;
 
 import org.junit.jupiter.api.Test;
@@ -70,13 +69,13 @@ RestClient.Builder restClientBuilder() {
 		LoadBalancerClient testLoadBalancerClient() {
 			return new LoadBalancerClient() {
 				@Override
-				public <T> T execute(String serviceId, LoadBalancerRequest<T> request) throws IOException {
+				public <T> T execute(String serviceId, LoadBalancerRequest<T> request) {
 					throw new UnsupportedOperationException("LoadBalancerInterceptor invoked.");
 				}
 
 				@Override
-				public <T> T execute(String serviceId, ServiceInstance serviceInstance, LoadBalancerRequest<T> request)
-						throws IOException {
+				public <T> T execute(String serviceId, ServiceInstance serviceInstance,
+						LoadBalancerRequest<T> request) {
 					throw new UnsupportedOperationException("LoadBalancerInterceptor invoked.");
 				}
 

spring-cloud-commons/src/test/java/org/springframework/cloud/client/loadbalancer/LoadBalancedRestTemplateBuilderIntegrationTests.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2012-2024 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.client.loadbalancer;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.client.RestTemplate;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for load-balanced {@link RestTemplateBuilder}.
+ *
+ * @author Olga Maciaszek-Sharma
+ */
+@SpringBootTest(classes = { LoadBalancedRestTemplateBuilderIntegrationTests.TestConfig.class,
+		LoadBalancerAutoConfiguration.class }, properties = "spring.cloud.loadbalancer.retry.enabled=false")
+public class LoadBalancedRestTemplateBuilderIntegrationTests {
+
+	private final RestTemplateBuilder restTemplateBuilder;
+
+	@Autowired
+	ApplicationContext context;
+
+	public LoadBalancedRestTemplateBuilderIntegrationTests(@Autowired RestTemplateBuilder restTemplateBuilder) {
+		this.restTemplateBuilder = restTemplateBuilder;
+	}
+
+	@Test
+	void shouldBuildLoadBalancedRestTemplate() {
+		RestTemplate restTemplate = restTemplateBuilder.build();
+
+		assertThat(restTemplate.getInterceptors()).hasSize(1);
+		assertThat(restTemplate.getInterceptors().get(0)).isInstanceOf(BlockingLoadBalancerInterceptor.class);
+	}
+
+	@SpringBootConfiguration
+	static class TestConfig {
+
+		@LoadBalanced
+		@Bean
+		RestTemplateBuilder restTemplateBuilder() {
+			return new RestTemplateBuilder();
+		}
+
+	}
+
+}