Add handling of deprecated API versions

See gh-35049

spring-web/src/test/java/org/springframework/web/accept/DefaultApiVersionStrategiesTests.java

@@ -64,7 +64,7 @@ public class DefaultApiVersionStrategiesTests {
 	private static DefaultApiVersionStrategy initVersionStrategy(@Nullable String defaultValue) {
 		return new DefaultApiVersionStrategy(
 				List.of(request -> request.getParameter("api-version")),
-				new SemanticApiVersionParser(), true, defaultValue);
+				new SemanticApiVersionParser(), true, defaultValue, null);
 	}
 
 }

spring-web/src/test/java/org/springframework/web/accept/StandardApiDeprecationHandlerTests.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2002-present 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
+ *
+ *      https://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 org.springframework.web.accept;
+
+import java.net.URI;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.web.testfixture.servlet.MockHttpServletRequest;
+import org.springframework.web.testfixture.servlet.MockHttpServletResponse;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Unit tests for {@link StandardApiDeprecationHandler}.
+ * @author Rossen Stoyanchev
+ */
+public class StandardApiDeprecationHandlerTests {
+
+	private final MockHttpServletRequest request = new MockHttpServletRequest();
+
+	private final MockHttpServletResponse response = new MockHttpServletResponse();
+
+
+	@Test
+	void basic() {
+		String deprecationUrl = "https://example.org/deprecation";
+		String sunsetDate = "Wed, 11 Nov 2026 11:11:11 GMT";
+		String sunsetUrl = "https://example.org/sunset";
+
+		ApiVersionParser<String> parser = version -> version;
+		StandardApiDeprecationHandler handler = new StandardApiDeprecationHandler(parser);
+
+		handler.configureVersion("1.1")
+				.setDeprecationDate(getDate("Fri, 30 Jun 2023 23:59:59 GMT"))
+				.setDeprecationLink(URI.create(deprecationUrl))
+				.setSunsetDate(getDate(sunsetDate))
+				.setSunsetLink(URI.create(sunsetUrl));
+
+		handler.handleVersion("1.1", request, response);
+
+		assertThat(response.getHeader("Deprecation")).isEqualTo("@1688169599");
+		assertThat(response.getHeader("Sunset")).isEqualTo(sunsetDate);
+		assertThat(response.getHeaders("Link")).containsExactlyInAnyOrder(
+				"<" + deprecationUrl + ">; rel=\"deprecation\"; type=\"text/html\"",
+				"<" + sunsetUrl + ">; rel=\"sunset\"; type=\"text/html\""
+		);
+	}
+
+	private static ZonedDateTime getDate(String date) {
+		return ZonedDateTime.parse(date, DateTimeFormatter.RFC_1123_DATE_TIME);
+	}
+
+}