Support dynamic port in test

tomcat-7.x/src/main/java/demo/TomcatApp.java

@@ -1,6 +1,8 @@
 package demo;
 
 import java.util.Arrays;
+
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.cloud.netflix.ribbon.RibbonClient;
@@ -10,6 +12,7 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
+
 import com.netflix.loadbalancer.BaseLoadBalancer;
 import com.netflix.loadbalancer.ILoadBalancer;
 import com.netflix.loadbalancer.Server;
@@ -22,6 +25,9 @@ import com.netflix.loadbalancer.Server;
 @RestController
 @RibbonClient(name = "self", configuration = TomcatApp.SelfRibbonClientConfiguration.class)
 public class TomcatApp {
+	@Value("${server.port}")
+	int port;
+
 	public static void main(String[] args) {
 		SpringApplication.run(TomcatApp.class, args);
 	}
@@ -31,7 +37,6 @@ public class TomcatApp {
 		return "GOOD" + (value == null ? "" : " " + value) + "!";
 	}
 
-	// Load balancer with fixed server list for "hello" pointing to example.com
 	@Configuration
 	class SelfRibbonClientConfiguration {
 
@@ -40,7 +45,7 @@ public class TomcatApp {
 			//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("localhost", 1234)));
+			balancer.setServersList(Arrays.asList(new Server("localhost", port)));
 			return balancer;
 		}
 

tomcat-7.x/src/main/resources/application.yml

@@ -4,12 +4,11 @@ zuul:
       path: /self/**
     example:
       path: /goodurl/**
-      url: http://localhost:1234/good
+      url: http://localhost:${server.port}/good
   set-content-length: true
 
 spring:
   application:
     name: zuul-app
 server:
-  port: 1234
-
+  port: 1234

tomcat-7.x/src/test/java/demo/TomcatAppTests.java

@@ -1,12 +1,16 @@
 package demo;
 
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.cloud.netflix.ribbon.SpringClientFactory;
 import org.springframework.http.ResponseEntity;
 import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.util.SocketUtils;
 
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.hamcrest.Matchers.is;
@@ -18,6 +22,20 @@ import static org.hamcrest.Matchers.is;
 @RunWith(SpringRunner.class)
 public class TomcatAppTests {
 
+	@BeforeClass
+	public static void beforeClass() {
+		int randomPort = SocketUtils.findAvailableTcpPort();
+		System.setProperty("server.port", String.valueOf(randomPort));
+	}
+
+	@AfterClass
+	public static void afterClass() {
+		System.clearProperty("server.port");
+	}
+
+	@Autowired
+	SpringClientFactory clientFactory;
+
 	@Autowired
 	private TestRestTemplate restTemplate;