Support multiple RequestRejectedHandler beans

Closes gh-10603

web/src/test/java/org/springframework/security/web/firewall/CompositeRequestRejectedHandlerTests.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2002-2021 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.security.web.firewall;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.mockito.Mockito.mock;
+
+public class CompositeRequestRejectedHandlerTests {
+
+	@Test
+	void compositeRequestRejectedHandlerRethrowsTheException() {
+		RequestRejectedException requestRejectedException = new RequestRejectedException("rejected");
+		DefaultRequestRejectedHandler sut = new DefaultRequestRejectedHandler();
+		CompositeRequestRejectedHandler crrh = new CompositeRequestRejectedHandler(sut);
+		assertThatExceptionOfType(RequestRejectedException.class).isThrownBy(() -> crrh
+				.handle(mock(HttpServletRequest.class), mock(HttpServletResponse.class), requestRejectedException))
+				.withMessage("rejected");
+	}
+
+	@Test
+	void compositeRequestRejectedHandlerForbidsEmptyHandlers() {
+		assertThatExceptionOfType(IllegalArgumentException.class).isThrownBy(CompositeRequestRejectedHandler::new);
+	}
+
+}