BAEL-1321 Jetty 9 Server - Create, Configure programmatically (#3482)

* Implemented server factory and its tests. Changed Jetty version to latest, removed duplicate entry and added jetty-webapp dependency in pom.xml.

* Added missing war file and changed tests port for Travis build.

libraries/src/test/java/com/baeldung/jetty/JettyServerFactoryUnitTest.java

@@ -0,0 +1,86 @@
+package com.baeldung.jetty;
+
+import org.apache.http.HttpHost;
+import org.apache.http.HttpRequest;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.eclipse.jetty.server.Server;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test for {@link JettyServerFactory}.
+ * 
+ * @author Donato Rimenti
+ *
+ */
+public class JettyServerFactoryUnitTest {
+
+	/**
+	 * Tests that when a base server is provided a request returns a status 404.
+	 * 
+	 * @throws Exception
+	 */
+	@Test
+	public void givenBaseServer_whenHttpRequest_thenStatus404() throws Exception {
+		Server server = JettyServerFactory.createBaseServer();
+		server.start();
+		
+		int statusCode = sendGetRequest();
+		
+		Assert.assertEquals(404, statusCode);
+		server.stop();
+	}
+
+	/**
+	 * Tests that when a web app server is provided a request returns a status
+	 * 200.
+	 * 
+	 * @throws Exception
+	 */
+	@Test
+	public void givenWebAppServer_whenHttpRequest_thenStatus200() throws Exception {
+		Server server = JettyServerFactory.createWebAppServer();
+		server.start();
+
+		int statusCode = sendGetRequest();
+		
+		Assert.assertEquals(200, statusCode);
+		server.stop();
+	}
+
+	/**
+	 * Tests that when a multi handler server is provided a request returns a
+	 * status 200.
+	 * 
+	 * @throws Exception
+	 */
+	@Test
+	public void givenMultiHandlerServerServer_whenHttpRequest_thenStatus200() throws Exception {
+		Server server = JettyServerFactory.createMultiHandlerServer();
+		server.start();
+
+		int statusCode = sendGetRequest();
+		
+		Assert.assertEquals(200, statusCode);
+		server.stop();
+	}
+
+	/**
+	 * Sends a default HTTP GET request to the server and returns the response
+	 * status code.
+	 * 
+	 * @return the status code of the response
+	 * @throws Exception
+	 */
+	private int sendGetRequest() throws Exception {
+		HttpHost target = new HttpHost("localhost", JettyServerFactory.SERVER_PORT);
+		HttpRequest request = new HttpGet(JettyServerFactory.APP_PATH);
+		HttpClient client = HttpClientBuilder.create().build();
+		HttpResponse response = client.execute(target, request);
+		return response.getStatusLine().getStatusCode();
+	}
+
+}