Copy cookies in RenderingResponse.from()

Prior to this commit, RenderingResponse.from() did not copy the
cookies of the given response, unlike ServerResponse.from().

See gh-22481
Closes gh-37378

Signed-off-by: Hyunwoo Jung <hyunwoojung@kakao.com>

spring-webmvc/src/main/java/org/springframework/web/servlet/function/DefaultRenderingResponseBuilder.java

@@ -62,6 +62,7 @@ final class DefaultRenderingResponseBuilder implements RenderingResponse.Builder
 		this.status = other.statusCode();
 		this.headers.putAll(other.headers());
 		this.model.putAll(other.model());
+		this.cookies.addAll(other.cookies());
 	}
 
 	public DefaultRenderingResponseBuilder(String name) {

spring-webmvc/src/main/java/org/springframework/web/servlet/function/RenderingResponse.java

@@ -49,7 +49,8 @@ public interface RenderingResponse extends ServerResponse {
 	// Builder
 
 	/**
-	 * Create a builder with the template name, status code, headers and model of the given response.
+	 * Create a builder with the template name, status code, headers, cookies,
+	 * and model of the given response.
 	 * @param other the response to copy the values from
 	 * @return the created builder
 	 */

spring-webmvc/src/test/java/org/springframework/web/servlet/function/DefaultRenderingResponseTests.java

@@ -179,5 +179,27 @@ class DefaultRenderingResponseTests {
 		assertThat(response.getStatus()).isEqualTo(HttpStatus.NOT_MODIFIED.value());
 	}
 
+	@Test  // gh-37378
+	void from() throws Exception {
+		Cookie cookie = new Cookie("currency", "USD");
+		RenderingResponse other = RenderingResponse.create("foo")
+				.status(HttpStatus.CREATED)
+				.header("foo", "bar")
+				.cookie(cookie)
+				.modelAttribute("model", "value")
+				.build();
+		RenderingResponse result = RenderingResponse.from(other).build();
+
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		MockHttpServletResponse response = new MockHttpServletResponse();
+
+		ModelAndView mav = result.writeTo(request, response, EMPTY_CONTEXT);
+		assertThat(mav).isNotNull();
+		assertThat(mav.getViewName()).isEqualTo("foo");
+		assertThat(mav.getModel()).containsEntry("model", "value");
+		assertThat(response.getStatus()).isEqualTo(HttpStatus.CREATED.value());
+		assertThat(response.getHeader("foo")).isEqualTo("bar");
+		assertThat(response.getCookies()).containsExactly(cookie);
+	}
 
 }