Add test for ssl scheme

Closes gh-2232

spring-boot/src/test/java/org/springframework/boot/context/embedded/AbstractEmbeddedServletContainerFactoryTests.java

@@ -57,6 +57,7 @@ import org.springframework.util.SocketUtils;
 import org.springframework.util.StreamUtils;
 import org.springframework.util.concurrent.ListenableFuture;
 
+import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.lessThan;
 import static org.hamcrest.Matchers.notNullValue;
@@ -313,6 +314,24 @@ public abstract class AbstractEmbeddedServletContainerFactoryTests {
 		testBasicSslWithKeyStore("src/test/resources/test.jks");
 	}
 
+	@Test
+	public void sslGetScheme() throws Exception { // gh-2232
+		AbstractEmbeddedServletContainerFactory factory = getFactory();
+		factory.setSsl(getSsl(null, "password", "src/test/resources/test.jks"));
+		this.container = factory.getEmbeddedServletContainer(new ServletRegistrationBean(
+				new ExampleServlet(true), "/hello"));
+		this.container.start();
+		SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(
+				new SSLContextBuilder().loadTrustMaterial(null,
+						new TrustSelfSignedStrategy()).build());
+		HttpClient httpClient = HttpClients.custom().setSSLSocketFactory(socketFactory)
+				.build();
+		HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory(
+				httpClient);
+		assertThat(getResponse(getLocalUrl("https", "/hello"), requestFactory),
+				containsString("scheme=https"));
+	}
+
 	protected final void testBasicSslWithKeyStore(String keyStore) throws Exception {
 		AbstractEmbeddedServletContainerFactory factory = getFactory();
 		addTestTxtFile(factory);

spring-boot/src/test/java/org/springframework/boot/context/embedded/ExampleServlet.java

@@ -31,10 +31,24 @@ import javax.servlet.ServletResponse;
 @SuppressWarnings("serial")
 public class ExampleServlet extends GenericServlet {
 
+	private final boolean echoRequestInfo;
+
+	public ExampleServlet() {
+		this(false);
+	}
+
+	public ExampleServlet(boolean echoRequestInfo) {
+		this.echoRequestInfo = echoRequestInfo;
+	}
+
 	@Override
 	public void service(ServletRequest request, ServletResponse response)
 			throws ServletException, IOException {
-		response.getWriter().write("Hello World");
+		String content = "Hello World";
+		if (this.echoRequestInfo) {
+			content += " scheme=" + request.getScheme();
+		}
+		response.getWriter().write(content);
 	}
 
 }