SPR-8585: add generic composite filter

org.springframework.web/src/test/java/org/springframework/web/filter/CompositeFilterTests.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2004, 2005 Acegi Technology Pty Limited
+ * Copyright 2006-2011 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
+ *
+ *      http://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.filter;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import java.io.IOException;
+import java.util.Arrays;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+
+import org.junit.Test;
+import org.springframework.mock.web.MockFilterConfig;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+import org.springframework.mock.web.MockServletContext;
+
+/**
+ * @author Dave Syer
+ */
+public class CompositeFilterTests {
+
+	@Test
+	public void testCompositeFilter() throws ServletException, IOException {
+		ServletContext sc = new MockServletContext();
+
+		MockFilter targetFilter = new MockFilter();
+
+		MockFilterConfig proxyConfig = new MockFilterConfig(sc);
+
+		CompositeFilter filterProxy = new CompositeFilter();
+		filterProxy.setFilters(Arrays.asList(targetFilter));
+		filterProxy.init(proxyConfig);
+
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		MockHttpServletResponse response = new MockHttpServletResponse();
+		filterProxy.doFilter(request, response, null);
+
+		assertNotNull(targetFilter.filterConfig);
+		assertEquals(Boolean.TRUE, request.getAttribute("called"));
+
+		filterProxy.destroy();
+		assertNull(targetFilter.filterConfig);
+	}
+
+
+	public static class MockFilter implements Filter {
+
+		public FilterConfig filterConfig;
+
+		public void init(FilterConfig filterConfig) throws ServletException {
+			this.filterConfig = filterConfig;
+		}
+
+		public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
+			request.setAttribute("called", Boolean.TRUE);
+		}
+
+		public void destroy() {
+			this.filterConfig = null;
+		}
+	}
+
+}