content: /*
   * Copyright 2013-2023 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 com.alibaba.cloud.tests.nacos.discovery;
  
  import java.util.ArrayList;
  import java.util.LinkedHashMap;
  import java.util.List;
  
  import com.alibaba.cloud.testsupport.ContainerStarter;
  import com.alibaba.cloud.testsupport.HasDockerAndItEnabled;
  import org.junit.jupiter.api.AfterAll;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  import org.testcontainers.containers.GenericContainer;
  import org.testcontainers.shaded.com.fasterxml.jackson.databind.ObjectMapper;
  
  import org.springframework.boot.builder.SpringApplicationBuilder;
  import org.springframework.boot.web.context.WebServerApplicationContext;
  import org.springframework.cloud.client.ServiceInstance;
  import org.springframework.cloud.client.discovery.DiscoveryClient;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.http.ResponseEntity;
  import org.springframework.web.client.RestTemplate;
  
  import static com.alibaba.cloud.tests.nacos.discovery.NacosDiscoveryTestApp.Service2Client;
  import static com.alibaba.cloud.testsupport.Tester.justDo;
  import static com.alibaba.cloud.testsupport.Tester.testFunction;
  import static java.util.function.Predicate.isEqual;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatThrownBy;
  
  /**
   *
   *
   * @author freeman
   */
  @HasDockerAndItEnabled
  public class NacosDiscoveryTest {
  
  	static GenericContainer nacos;
  	static ConfigurableApplicationContext service1 = new SpringApplicationBuilder(
  			NacosDiscoveryTestApp.class).profiles("service-1").run();
  	static ConfigurableApplicationContext service2_0 = new SpringApplicationBuilder(
  			NacosDiscoveryTestApp.class).profiles("service-2").run();
  	static ConfigurableApplicationContext service2_1 = new SpringApplicationBuilder(
  			NacosDiscoveryTestApp.class).profiles("service-2").run();
  
  	static {
  		nacos = ContainerStarter.startNacos();
  
  		// wait nacos started
  		justDo(() -> Thread.sleep(4000L));
  	}
  
  	static {
  		String serverAddr = "localhost:" + nacos.getMappedPort(8848);
  		System.setProperty("spring.cloud.nacos.discovery.server-addr", serverAddr);
  	}
  
  	@BeforeAll
  	static void init() {
  		// give nacos a break
  		justDo(() -> Thread.sleep(1000L));
  	}
  
  	@AfterAll
  	static void stop() {
  		service1.stop();
  		service2_0.stop();
  		service2_1.stop();
  	}
  
  	@Test
  	public void testServiceDiscovery() {
  		testFunction("Service discovery", () -> {
  			DiscoveryClient discoveryClient = service1.getBean(DiscoveryClient.class);
  			List<ServiceInstance> instances = discoveryClient.getInstances("service-2");
  			assertThat(instances).hasSize(2);
  		});
  	}
  
  	@Test
  	public void testServiceDiscoveryWithRestTemplate() {
  		testFunction("Service discovery with RestTemplate", () -> {
  			RestTemplate restTemplate = service1.getBean(RestTemplate.class);
  			assertThatThrownBy(() -> service2_0.getBean(RestTemplate.class));
  
  			// default using RR
  			List<Object> list1 = new ArrayList<>();
  			List<Object> list2 = new ArrayList<>();
  			for (int i = 0; i < 20; i++) {
  				ResponseEntity<String> response = restTemplate
  						.getForEntity("http://service-2", String.class);
  				if (i % 2 != 0) {
  					list1.add(response.getBody());
  				}
  				else {
  					list2.add(response.getBody());
  				}
  			}
  
  			assertThat(list1).hasSize(10);
  			assertThat(list1.stream().allMatch(isEqual(list1.get(0)))).isTrue();
  			assertThat(list2).hasSize(10);
  			assertThat(list2.stream().allMatch(isEqual(list2.get(0)))).isTrue();
  		});
  	}
  
  	@Test
  	public void testServiceDiscoveryWithFeignClient() {
  		testFunction("Service discovery with FeignClient", () -> {
  			Service2Client service2Client = service1.getBean(Service2Client.class);
  
  			// default using RR
  			List<Object> list1 = new ArrayList<>();
  			List<Object> list2 = new ArrayList<>();
  			for (int i = 0; i < 20; i++) {
  				Object result = service2Client.get();
  				if (i % 2 != 0) {
  					list1.add(result);
  				}
  				else {
  					list2.add(result);
  				}
  			}
  
  			assertThat(list1).hasSize(10);
  			assertThat(list1.stream().allMatch(isEqual(list1.get(0)))).isTrue();
  			assertThat(list2).hasSize(10);
  			assertThat(list2.stream().allMatch(isEqual(list2.get(0)))).isTrue();
  		});
  	}
  
  	@Test
  	public void testServiceDiscoveryWithFeignClientUsingSentinelCircuitBreaker() {
  		testFunction("Service discovery with FeignClient using Sentinel Circuit Breaker",
  				() -> {
  					Service2Client service2Client = service1
  							.getBean(Service2Client.class);
  
  					List<Object> passResult = new ArrayList<>();
  					List<Object> fallbackResult = new ArrayList<>();
  					for (int i = 0; i < 10; i++) {
  						passResult.add(service2Client.pass(true));
  						fallbackResult.add(service2Client.pass(false));
  					}
  
  					assertThat(passResult.stream().allMatch(isEqual("ok"))).isTrue();
  					assertThat(fallbackResult.stream().allMatch(isEqual("fallback")))
  							.isTrue();
  				});
  	}
  
  	@Test
  	public void testServiceDiscoveryActuatorEndpoint() {
  		testFunction("Service discovery actuator endpoint", () -> {
  
  			WebServerApplicationContext webServerApplicationContext = (WebServerApplicationContext) service1;
  			int port = webServerApplicationContext.getWebServer().getPort();
  
  			String response = new RestTemplate().getForEntity(
  					String.format("http://127.0.0.1:%d/actuator/nacosdiscovery", port),
  					String.class).getBody();
  
  			LinkedHashMap map = new ObjectMapper().readValue(response,
  					LinkedHashMap.class);
  
  			assertThat(map.containsKey("subscribe")).isTrue();
  			assertThat(map.containsKey("NacosDiscoveryProperties")).isTrue();
  		});
  	}
  
  }
  