Spring Framework example source code file (RequestContextFilterTests.java)

This example Spring Framework source code file (RequestContextFilterTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

dummyfilterchain, dummyfilterchain, exception, exception, filterchain, illegalstateexception, io, ioexception, mockfilterconfig, mockhttpservletrequest, mockhttpservletresponse, mockhttpservletresponse, requestcontextfilter, servlet, servletexception, servletexception

The Spring Framework RequestContextFilterTests.java source code

/*
 * Copyright 2002-2007 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 java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import junit.framework.TestCase;

import org.springframework.mock.web.MockFilterConfig;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.mock.web.MockServletContext;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;

/**
 * @author Rod Johnson
 * @author Juergen Hoeller
 */
public class RequestContextFilterTests extends TestCase {

	public void testHappyPath() throws Exception {
		testFilterInvocation(null);
	}
	
	public void testWithException() throws Exception {
		testFilterInvocation(new ServletException());
	}
		
	public void testFilterInvocation(final ServletException sex) throws Exception {
		final MockHttpServletRequest req = new MockHttpServletRequest();
		req.setAttribute("myAttr", "myValue");
		final MockHttpServletResponse resp = new MockHttpServletResponse();
		
		// Expect one invocation by the filter being tested
		class DummyFilterChain implements FilterChain {
			public int invocations = 0;
			public void doFilter(ServletRequest req, ServletResponse resp) throws IOException, ServletException {
				++invocations;
				if (invocations == 1) {
					assertSame("myValue",
							RequestContextHolder.currentRequestAttributes().getAttribute("myAttr", RequestAttributes.SCOPE_REQUEST));
					if (sex != null) {
						throw sex;
					}
				}
				else {
					throw new IllegalStateException("Too many invocations");
				}
			}
		};

		DummyFilterChain fc = new DummyFilterChain();
		MockFilterConfig mfc = new MockFilterConfig(new MockServletContext(), "foo");

		RequestContextFilter rbf = new RequestContextFilter();
		rbf.init(mfc);

		try {
			rbf.doFilter(req, resp, fc);
			if (sex != null) {
				fail();
			}
		}
		catch (ServletException ex) {
			assertNotNull(sex);
		}
		
		try {
			RequestContextHolder.currentRequestAttributes();
			fail();
		}
		catch (IllegalStateException ex) {
			// Ok
		}

		assertEquals(1, fc.invocations);
	}

}