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.nacos.discovery.reactive;
  
  import java.util.Arrays;
  
  import com.alibaba.cloud.nacos.discovery.NacosServiceDiscovery;
  import com.alibaba.cloud.nacos.discovery.ServiceCache;
  import com.alibaba.nacos.api.exception.NacosException;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.InjectMocks;
  import org.mockito.Mock;
  import org.mockito.junit.jupiter.MockitoExtension;
  import reactor.core.publisher.Flux;
  import reactor.test.StepVerifier;
  
  import org.springframework.cloud.client.ServiceInstance;
  import org.springframework.test.util.ReflectionTestUtils;
  
  import static java.util.Collections.singletonList;
  import static org.mockito.Mockito.when;
  
  /**
   * @author <a href="mailto:echooy.mxq@gmail.com">echooymxq</a>
   * @author freeman
   **/
  @ExtendWith(MockitoExtension.class)
  class NacosReactiveDiscoveryClientTests {
  
  	@Mock
  	private NacosServiceDiscovery serviceDiscovery;
  
  	@Mock
  	private ServiceInstance serviceInstance;
  
  	@InjectMocks
  	private NacosReactiveDiscoveryClient client;
  
  	@Test
  	void testGetInstances() throws NacosException {
  
  		when(serviceDiscovery.getInstances("reactive-service"))
  				.thenReturn(singletonList(serviceInstance));
  
  		Flux<ServiceInstance> instances = this.client.getInstances("reactive-service");
  
  		StepVerifier.create(instances).expectNextCount(1).expectComplete().verify();
  	}
  
  	@Test
  	void testGetServices() throws NacosException {
  
  		when(serviceDiscovery.getServices())
  				.thenReturn(Arrays.asList("reactive-service1", "reactive-service2"));
  
  		Flux<String> services = this.client.getServices();
  
  		StepVerifier.create(services).expectNext("reactive-service1", "reactive-service2")
  				.expectComplete().verify();
  	}
  
  	@Test
  	public void testGetInstancesFailureToleranceEnabled() throws NacosException {
  		ServiceCache.setInstances("a", singletonList(serviceInstance));
  
  		when(serviceDiscovery.getInstances("a")).thenThrow(new NacosException());
  		ReflectionTestUtils.setField(client, "failureToleranceEnabled", true);
  
  		Flux<ServiceInstance> instances = this.client.getInstances("a");
  
  		StepVerifier.create(instances).expectNext(serviceInstance)
  				.expectComplete().verify();
  	}
  
  	@Test
  	public void testGetInstancesFailureToleranceDisabled() throws NacosException {
  		ServiceCache.setInstances("a", singletonList(serviceInstance));
  
  		when(serviceDiscovery.getInstances("a")).thenThrow(new NacosException());
  		ReflectionTestUtils.setField(client, "failureToleranceEnabled", false);
  
  		Flux<ServiceInstance> instances = this.client.getInstances("a");
  
  		StepVerifier.create(instances).expectComplete().verify();
  	}
  
  	@Test
  	public void testFailureToleranceEnabled() throws NacosException {
  		ServiceCache.setServiceIds(Arrays.asList("a", "b"));
  
  		when(serviceDiscovery.getServices()).thenThrow(new NacosException());
  		ReflectionTestUtils.setField(client, "failureToleranceEnabled", true);
  
  
  		Flux<String> services = this.client.getServices();
  
  		StepVerifier.create(services).expectNext("a", "b")
  				.expectComplete().verify();
  	}
  
  	@Test
  	public void testFailureToleranceDisabled() throws NacosException {
  		ServiceCache.setServiceIds(Arrays.asList("a", "b"));
  
  		when(serviceDiscovery.getServices()).thenThrow(new NacosException());
  		ReflectionTestUtils.setField(client, "failureToleranceEnabled", false);
  
  		Flux<String> services = this.client.getServices();
  
  		StepVerifier.create(services).expectComplete().verify();
  	}
  
  	@Test
  	public void testCacheIsOK() throws NacosException, InterruptedException {
  		when(serviceDiscovery.getInstances("a"))
  				.thenReturn(singletonList(serviceInstance));
  		Flux<ServiceInstance> instances = this.client.getInstances("a");
  
  		instances = instances.doOnComplete(() -> {
  			if (!ServiceCache.getInstances("a").equals(singletonList(serviceInstance))) {
  				throw new RuntimeException();
  			}
  		});
  
  		StepVerifier.create(instances)
  						.expectNext(serviceInstance)
  						.expectComplete().verify();
  	}
  
  }
  