add additional /hystrix.stream endpoint integration test

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/hystrix/HystrixStreamEndpointTests.java

 /*
- * Copyright 2013-2014 the original author or authors.
+ * Copyright 2013-2015 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.
@@ -16,19 +16,91 @@
 
 package org.springframework.cloud.netflix.hystrix;
 
+import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.IntegrationTest;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
+import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
 
-import static org.junit.Assert.assertEquals;
+import java.io.InputStream;
+import java.net.URL;
+
+import static org.junit.Assert.*;
 
 /**
  * @author Dave Syer
+ * @author Spencer Gibb
  */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = HystrixStreamEndpointTests.Application.class)
+@WebAppConfiguration
+@IntegrationTest({ "server.port=0", "spring.application.name=hystrixstreamtest" })
+@DirtiesContext
 public class HystrixStreamEndpointTests {
 
+	@Value("${local.server.port}")
+	private int port = 0;
+
 	@Test
 	public void pathStartsWithSlash() {
 		HystrixStreamEndpoint endpoint = new HystrixStreamEndpoint();
 		assertEquals("/hystrix.stream", endpoint.getPath());
 	}
 
+	@Test
+	public void hystrixStreamWorks() throws Exception {
+		String url = "http://localhost:" + port;
+		//you have to hit a Hystrix circuit breaker before the stream sends anything
+		ResponseEntity<String> response = new TestRestTemplate().getForEntity(url, String.class);
+		assertEquals("bad response code", HttpStatus.OK, response.getStatusCode());
+
+		URL hystrixUrl = new URL(url + "/admin/hystrix.stream");
+		InputStream in = hystrixUrl.openStream();
+		byte[] buffer = new byte[1024];
+		in.read(buffer);
+		String contents = new String(buffer);
+		assertTrue(contents.contains("ping"));
+		in.close();
+	}
+
+	@Configuration
+	@EnableAutoConfiguration
+	@RestController
+	@EnableCircuitBreaker
+	protected static class Application {
+		@Autowired
+		Service service;
+
+		@Bean
+		Service service() {
+			return new Service();
+		}
+
+		@RequestMapping("/")
+		public String hello() {
+			return service.hello();
+		}
+	}
+
+	protected static class Service {
+		@HystrixCommand
+		public String hello() {
+			return "Hello World";
+		}
+	}
 }
+