MockHttpServletResponse.setIntHeader supports 'Content-Length' header as well

Issue: SPR-13752

spring-test/src/test/java/org/springframework/mock/web/MockHttpServletResponseTests.java

@@ -19,7 +19,6 @@ package org.springframework.mock.web;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.Collection;
-
 import javax.servlet.http.HttpServletResponse;
 
 import org.junit.Test;
@@ -92,9 +91,7 @@ public class MockHttpServletResponseTests {
 		assertEquals("UTF-8", response.getCharacterEncoding());
 	}
 
-	// SPR-12677
-
-	@Test
+	@Test  // SPR-12677
 	public void contentTypeHeaderWithMoreComplexCharsetSyntax() {
 		String contentType = "test/plain;charset=\"utf-8\";foo=\"charset=bar\";foocharset=bar;foo=bar";
 		response.setHeader("Content-Type", contentType);
@@ -141,6 +138,13 @@ public class MockHttpServletResponseTests {
 		assertEquals("66", response.getHeader("Content-Length"));
 	}
 
+	@Test
+	public void contentLengthIntHeader() {
+		response.addIntHeader("Content-Length", 66);
+		assertEquals(66, response.getContentLength());
+		assertEquals("66", response.getHeader("Content-Length"));
+	}
+
 	@Test
 	public void httpHeaderNameCasingIsPreserved() throws Exception {
 		final String headerName = "Header1";
@@ -269,20 +273,14 @@ public class MockHttpServletResponseTests {
 		response.getDateHeader("Last-Modified");
 	}
 
-	/**
-	 * SPR-10414
-	 */
-	@Test
+	@Test  // SPR-10414
 	public void modifyStatusAfterSendError() throws IOException {
 		response.sendError(HttpServletResponse.SC_NOT_FOUND);
 		response.setStatus(HttpServletResponse.SC_OK);
 		assertEquals(response.getStatus(),HttpServletResponse.SC_NOT_FOUND);
 	}
 
-	/**
-	 * SPR-10414
-	 */
-	@Test
+	@Test  // SPR-10414
 	@SuppressWarnings("deprecation")
 	public void modifyStatusMessageAfterSendError() throws IOException {
 		response.sendError(HttpServletResponse.SC_NOT_FOUND);