Support JSPs in Embedded Jetty

JSPs are now supported in executable WARs with embedded Jetty.

Fixes gh-367
Closes gh-5290

spring-boot-samples/spring-boot-sample-jetty-jsp/src/test/java/sample/jetty/jsp/SampleWebJspApplicationTests.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2012-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package sample.jetty.jsp;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.boot.context.embedded.LocalServerPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Basic integration tests for JSP application.
+ *
+ * @author Phillip Webb
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+@DirtiesContext
+public class SampleWebJspApplicationTests {
+
+	@LocalServerPort
+	private int port;
+
+	@Test
+	public void testJspWithEl() throws Exception {
+		ResponseEntity<String> entity = new TestRestTemplate()
+				.getForEntity("http://localhost:" + this.port, String.class);
+		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(entity.getBody()).contains("/resources/text.txt");
+	}
+
+}