Add simple custom zuul filter example

zuul/src/test/java/demo/ZuulApplicationTests.java

@@ -1,11 +1,14 @@
 package demo;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 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.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.TestRestTemplate;
 import org.springframework.boot.test.WebIntegrationTest;
 import org.springframework.cloud.client.discovery.DiscoveryClient;
 import org.springframework.cloud.client.discovery.noop.NoopDiscoveryClient;
@@ -15,18 +18,24 @@ import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 @RunWith(SpringJUnit4ClassRunner.class)
 @SpringApplicationConfiguration(classes = ZuulApplication.class)
 @DirtiesContext
-@WebIntegrationTest(randomPort=true)
+@WebIntegrationTest(randomPort = true)
 public class ZuulApplicationTests {
 
 	@Autowired
 	DiscoveryClient discoveryClient;
 
+	@Value("${local.server.port}")
+	int port;
+
 	@Test
 	public void contextLoads() {
+		assertEquals("Hello World", new TestRestTemplate()
+				.getForObject("http://localhost:" + this.port + "/static", String.class));
 	}
 
 	@Test
 	public void discoveryClientIsNoop() {
-		assertTrue("discoveryClient is wrong type", discoveryClient instanceof NoopDiscoveryClient);
+		assertTrue("discoveryClient is wrong type",
+				this.discoveryClient instanceof NoopDiscoveryClient);
 	}
 }