RetryLoadBalancerAutoConfigurationTests.java

/*
 * Copyright 2012-present 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 java.util.List;

import org.junit.jupiter.api.Test;

import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.retry.backoff.NoBackOffPolicy;
import org.springframework.web.client.RestClient;
import org.springframework.web.client.RestTemplate;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.BDDAssertions.then;

/**
 * @author Ryan Baxter
 * @author Olga Maciaszek-Sharma
 */
public class RetryLoadBalancerAutoConfigurationTests extends AbstractLoadBalancerAutoConfigurationTests {

	@Override
	protected void assertLoadBalanced(RestTemplate restTemplate) {
		List<ClientHttpRequestInterceptor> interceptors = restTemplate.getInterceptors();
		then(interceptors).hasSize(1);
		ClientHttpRequestInterceptor interceptor = interceptors.get(0);
		then(interceptor).isInstanceOf(RetryLoadBalancerInterceptor.class);
	}

	@Override
	protected void assertLoadBalanced(RestClient.Builder restClientBuilder) {
		restClientBuilder.requestInterceptors(interceptors -> {
			assertThat(interceptors).hasSize(1);
			assertThat(interceptors.get(0)).isInstanceOf(DeferringLoadBalancerInterceptor.class);
		});
	}

	@Test
	void testRetryDisabled() {
		applicationContextRunner.withUserConfiguration(OneRestTemplate.class)
			.withPropertyValues("spring.aop.proxyTargetClass=true", "spring.cloud.loadbalancer.retry.enabled=false")
			.run(context -> {
				List<ClientHttpRequestInterceptor> interceptors = context.getBean(RestTemplate.class).getInterceptors();
				then(interceptors).hasSize(1);
				ClientHttpRequestInterceptor interceptor = interceptors.get(0);
				then(interceptor).isInstanceOf(LoadBalancerInterceptor.class);
			});
	}

	@Test
	void testRetryDisabledWithRestClientBuilder() {
		applicationContextRunner.withUserConfiguration(OneRestClientBuilder.class)
			.withPropertyValues("spring.aop.proxyTargetClass=true", "spring.cloud.loadbalancer.retry.enabled=false")
			.run(context -> {
				RestClient.Builder restClientBuilder = context.getBean(RestClient.Builder.class);

				restClientBuilder.requestInterceptors(interceptors -> {
					assertThat(interceptors).hasSize(1);
					assertThat(interceptors.get(0)).isInstanceOf(DeferringLoadBalancerInterceptor.class);
					DeferringLoadBalancerInterceptor interceptor = (DeferringLoadBalancerInterceptor) interceptors
						.get(0);
					assertThat(interceptor.getLoadBalancerInterceptorProvider().getObject())
						.isInstanceOf(LoadBalancerInterceptor.class);
				});
			});
	}

	@Test
	void testDefaultBackOffPolicy() {
		applicationContextRunner.withUserConfiguration(OneRestTemplate.class).run(context -> {
			LoadBalancedRetryFactory loadBalancedRetryFactory = context.getBean(LoadBalancedRetryFactory.class);
			then(loadBalancedRetryFactory).isInstanceOf(LoadBalancedRetryFactory.class);
			then(loadBalancedRetryFactory.createBackOffPolicy("foo")).isInstanceOf(NoBackOffPolicy.class);
		});
	}

}