Add plain @EnableZuulServer sample

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

@@ -0,0 +1,30 @@
+package demo;
+
+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.boot.test.SpringApplicationConfiguration;
+import org.springframework.cloud.client.discovery.DiscoveryClient;
+import org.springframework.cloud.client.discovery.noop.NoopDiscoveryClient;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = ZuulApplication.class)
+@DirtiesContext
+public class ZuulApplicationTests {
+
+	@Autowired
+	DiscoveryClient discoveryClient;
+
+	@Test
+	public void contextLoads() {
+	}
+
+	@Test
+	public void discoveryClientIsNoop() {
+		assertTrue("discoveryClient is wrong type", discoveryClient instanceof NoopDiscoveryClient);
+	}
+}