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.circuitbreaker.sentinel.feign;
  
  import org.junit.jupiter.api.Test;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
  import org.springframework.boot.test.context.SpringBootTest;
  import org.springframework.cloud.openfeign.EnableFeignClients;
  import org.springframework.cloud.openfeign.FeignClient;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.stereotype.Component;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.PathVariable;
  import org.springframework.web.bind.annotation.RestController;
  
  import static com.alibaba.cloud.circuitbreaker.sentinel.feign.FeignClientCircuitBreakerRuleIntegrationTest.Application;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.DEFINED_PORT;
  
  /**
   * @author freeman
   */
  @SpringBootTest(webEnvironment = DEFINED_PORT, classes = Application.class, properties = {
  		"server.port=10101",
  		"spring.cloud.openfeign.circuitbreaker.enabled=true",
  		"feign.sentinel.default-rule=default",
  		"feign.sentinel.rules.default[0].grade=2",
  		"feign.sentinel.rules.default[0].count=2",
  		"feign.sentinel.rules.default[0].timeWindow=1",
  		"feign.sentinel.rules.default[0].statIntervalMs=30000",
  		"feign.sentinel.rules.default[0].minRequestAmount=5",
  		"feign.sentinel.rules.user[0].grade=2",
  		"feign.sentinel.rules.user[0].count=2",
  		"feign.sentinel.rules.user[0].timeWindow=1",
  		"feign.sentinel.rules.user[0].statIntervalMs=30000",
  		"feign.sentinel.rules.user[0].minRequestAmount=5",
  		"feign.sentinel.rules.[user#specificFeignMethod(boolean)][0].grade=2",
  		"feign.sentinel.rules.[user#specificFeignMethod(boolean)][0].count=1",
  		"feign.sentinel.rules.[user#specificFeignMethod(boolean)][0].timeWindow=1",
  		"feign.sentinel.rules.[user#specificFeignMethod(boolean)][0].statIntervalMs=30000",
  		"feign.sentinel.rules.[user#specificFeignMethod(boolean)][0].minRequestAmount=5"
  })
  public class FeignClientCircuitBreakerRuleIntegrationTest {
  
  	@Autowired
  	private Application.UserClient userClient;
  	@Autowired
  	private Application.OrderClient orderClient;
  
  	@Test
  	public void testDefaultRule() throws Exception {
  		// test default configuration is working
  
  		// ok
  		assertThat(orderClient.defaultConfig(true)).isEqualTo("ok");
  		assertThat(orderClient.defaultConfig(true)).isEqualTo("ok");
  		assertThat(orderClient.defaultConfig(true)).isEqualTo("ok");
  		assertThat(orderClient.defaultConfig(true)).isEqualTo("ok");
  		assertThat(orderClient.defaultConfig(true)).isEqualTo("ok");
  
  		// occur exception
  		assertThat(orderClient.defaultConfig(false)).isEqualTo("fallback");
  		assertThat(orderClient.defaultConfig(false)).isEqualTo("fallback");
  		// the 3rd exception, circuit breaker open
  		assertThat(orderClient.defaultConfig(false)).isEqualTo("fallback");
  
  		// sleep 300, ensure circuit breaker status is open.
  		Thread.sleep(300);
  
  		// test circuit breaker open
  		assertThat(orderClient.defaultConfig(true)).isEqualTo("fallback");
  		assertThat(orderClient.defaultConfig(false)).isEqualTo("fallback");
  
  		// longer than timeWindow, circuit breaker half open
  		Thread.sleep(1200L);
  
  		// let circuit breaker close
  		assertThat(orderClient.defaultConfig(true)).isEqualTo("ok");
  		assertThat(orderClient.defaultConfig(false)).isEqualTo("fallback");
  	}
  
  	@Test
  	public void testSpecificFeignRule() throws Exception {
  		// test specific Feign client configuration is working
  
  		// ok
  		assertThat(userClient.specificFeign(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeign(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeign(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeign(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeign(true)).isEqualTo("ok");
  
  		// occur exception
  		assertThat(userClient.specificFeign(false)).isEqualTo("fallback");
  		assertThat(userClient.specificFeign(false)).isEqualTo("fallback");
  		// the 3rd exception, circuit breaker open
  		assertThat(userClient.specificFeign(false)).isEqualTo("fallback");
  
  		Thread.sleep(300);
  
  		// test circuit breaker open
  		assertThat(userClient.specificFeign(true)).isEqualTo("fallback");
  		assertThat(userClient.specificFeign(false)).isEqualTo("fallback");
  
  		// longer than timeWindow, circuit breaker half open
  		Thread.sleep(1200L);
  
  		// let circuit breaker close
  		assertThat(userClient.specificFeign(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeign(false)).isEqualTo("fallback");
  	}
  
  	@Test
  	public void testSpecificFeignMethodRule() throws Exception {
  		// test specific Feign client method configuration is working
  
  		// ok
  		assertThat(userClient.specificFeignMethod(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeignMethod(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeignMethod(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeignMethod(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeignMethod(true)).isEqualTo("ok");
  
  		// occur exception
  		assertThat(userClient.specificFeignMethod(false)).isEqualTo("fallback");
  		// occur the 2nd exception, circuit breaker open
  		assertThat(userClient.specificFeignMethod(false)).isEqualTo("fallback");
  
  		Thread.sleep(300);
  
  		// test circuit breaker is open
  		assertThat(userClient.specificFeignMethod(true)).isEqualTo("fallback");
  		assertThat(userClient.specificFeignMethod(false)).isEqualTo("fallback");
  
  		// longer than timeWindow, circuit breaker half open
  		Thread.sleep(1200L);
  
  		// let circuit breaker close
  		assertThat(userClient.specificFeignMethod(true)).isEqualTo("ok");
  		assertThat(userClient.specificFeignMethod(false)).isEqualTo("fallback");
  	}
  
  	@Configuration
  	@EnableAutoConfiguration
  	@RestController
  	@EnableFeignClients
  	protected static class Application {
  
  		@FeignClient(value = "user", url = "http://localhost:${server.port}", fallback = UserClientFallback.class)
  		interface UserClient {
  
  			@GetMapping("/specificFeign/{success}")
  			String specificFeign(@PathVariable boolean success);
  
  			@GetMapping("/specificFeignMethod/{success}")
  			String specificFeignMethod(@PathVariable boolean success);
  
  		}
  
  		@FeignClient(value = "order", url = "http://localhost:${server.port}", fallback = OrderClientFallback.class)
  		interface OrderClient {
  
  			@GetMapping("/defaultConfig/{success}")
  			String defaultConfig(@PathVariable boolean success);
  
  		}
  
  		@Component
  		static class UserClientFallback implements UserClient {
  
  			@Override
  			public String specificFeign(boolean success) {
  				return "fallback";
  			}
  
  			@Override
  			public String specificFeignMethod(boolean success) {
  				return "fallback";
  			}
  
  		}
  
  		@Component
  		static class OrderClientFallback implements OrderClient {
  
  			@Override
  			public String defaultConfig(boolean success) {
  				return "fallback";
  			}
  
  		}
  
  		@RestController
  		static class TestController {
  
  			@GetMapping("/specificFeign/{success}")
  			public String specificFeign(@PathVariable boolean success) {
  				if (success) {
  					return "ok";
  				}
  				throw new RuntimeException("failed");
  			}
  
  			@GetMapping("/defaultConfig/{success}")
  			String defaultConfig(@PathVariable boolean success) {
  				if (success) {
  					return "ok";
  				}
  				throw new RuntimeException("failed");
  			}
  
  			@GetMapping("/specificFeignMethod/{success}")
  			String specificFeignMethod(@PathVariable boolean success) {
  				if (success) {
  					return "ok";
  				}
  				throw new RuntimeException("failed");
  			}
  
  		}
  
  	}
  
  }
  