add some feign test with and without eureka

feign-eureka/src/main/java/demo/HelloClientApplication.java

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+package demo;
+
+import com.netflix.client.config.IClientConfig;
+import com.netflix.loadbalancer.*;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.cloud.netflix.feign.FeignClient;
+import org.springframework.cloud.netflix.feign.FeignClientScan;
+import org.springframework.cloud.netflix.ribbon.RibbonClient;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.springframework.web.bind.annotation.RequestMethod.*;
+
+/**
+ * @author Spencer Gibb
+ */
+@SpringBootApplication
+@EnableDiscoveryClient
+@RestController
+@FeignClientScan
+@RibbonClient(name = "hello", configuration = HelloRibbonClientConfiguration.class)
+public class HelloClientApplication {
+	@Autowired
+	HelloClient client;
+
+	@RequestMapping("/")
+	public String hello() {
+		return client.hello();
+	}
+
+	public static void main(String[] args) {
+		SpringApplication.run(HelloClientApplication.class, args);
+	}
+
+	@FeignClient("hello")
+	interface HelloClient {
+		@RequestMapping(value = "/", method = GET)
+		String hello();
+	}
+}
+
+// Load balancer with fixed server list for "hello" pointing to example.com
+@Configuration
+class HelloRibbonClientConfiguration {
+
+	@Bean
+	public ILoadBalancer ribbonLoadBalancer() {
+		//because of this, it doesn't use eureka to lookup the server,
+		// but the classpath is tested
+		BaseLoadBalancer balancer = new BaseLoadBalancer();
+		balancer.setServersList(Arrays.asList(new Server("example.com", 80)));
+		return balancer;
+	}
+
+}

feign-eureka/src/main/resources/application.yml

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+spring:
+  application:
+    name: HelloClient
+
+server:
+  port: 7211
+
+eureka:
+  password: password
+  client:
+    serviceUrl:
+      defaultZone: http://user:${eureka.password}@localhost:8761/eureka/
+  instance:
+    leaseRenewalIntervalInSeconds: 10
+    metadataMap:
+      instanceId: ${vcap.application.instance_id:${spring.application.name}:${spring.application.instance_id:${server.port}}}
+
+
+endpoints:
+  restart:
+    enabled: true
+  shutdown:
+    enabled: true
+  health:
+    sensitive: false

feign-eureka/src/test/java/demo/HelloClientApplicationTests.java

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+package demo;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.IntegrationTest;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = HelloClientApplication.class)
+@WebAppConfiguration
+@IntegrationTest("server.port=0")
+public class HelloClientApplicationTests {
+
+	@Value("${local.server.port}")
+	int port;
+
+	@Test
+	public void clientConnects() {
+		ResponseEntity<String> response = new TestRestTemplate().getForEntity("http://localhost:" + port, String.class);
+		assertNotNull("response was null", response);
+		assertEquals("Wrong status code", HttpStatus.OK, response.getStatusCode());
+		assertTrue(response.getBody().contains("<html"));
+	}
+
+}