/* Copyright 2004 Acegi Technology Pty Limited
    *
    * 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.acegisecurity.securechannel;
  
  import junit.framework.TestCase;
  
  import org.acegisecurity.ConfigAttribute;
  import org.acegisecurity.ConfigAttributeDefinition;
  import org.acegisecurity.MockFilterChain;
  import org.acegisecurity.SecurityConfig;
  import org.acegisecurity.intercept.web.FilterInvocation;
  
  import java.io.IOException;
  
  import java.util.Iterator;
  import java.util.List;
  import java.util.Vector;
  
  import javax.servlet.ServletException;
  
  import org.springframework.mock.web.MockHttpServletRequest;
  import org.springframework.mock.web.MockHttpServletResponse;
  
  
  /***
   * Tests {@link ChannelDecisionManagerImpl}.
   *
   * @author Ben Alex
   * @version $Id: ChannelDecisionManagerImplTests.java,v 1.4 2005/11/17 00:55:48 benalex Exp $
   */
  public class ChannelDecisionManagerImplTests extends TestCase {
      //~ Methods ================================================================
  
      public final void setUp() throws Exception {
          super.setUp();
      }
  
      public static void main(String[] args) {
          junit.textui.TestRunner.run(ChannelDecisionManagerImplTests.class);
      }
  
      public void testCannotSetEmptyChannelProcessorsList()
          throws Exception {
          ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
  
          try {
              cdm.setChannelProcessors(new Vector());
              fail("Should have thrown IllegalArgumentException");
          } catch (IllegalArgumentException expected) {
              assertEquals("A list of ChannelProcessors is required",
                  expected.getMessage());
          }
      }
  
      public void testCannotSetIncorrectObjectTypesIntoChannelProcessorsList()
          throws Exception {
          ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
          List list = new Vector();
          list.add("THIS IS NOT A CHANNELPROCESSOR");
  
          try {
              cdm.setChannelProcessors(list);
              fail("Should have thrown IllegalArgumentException");
          } catch (IllegalArgumentException expected) {
              assertTrue(true);
          }
      }
  
      public void testCannotSetNullChannelProcessorsList()
          throws Exception {
          ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
  
          try {
              cdm.setChannelProcessors(null);
              fail("Should have thrown IllegalArgumentException");
          } catch (IllegalArgumentException expected) {
              assertEquals("A list of ChannelProcessors is required",
                  expected.getMessage());
          }
      }
  
      public void testDecideIsOperational() throws Exception {
          ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
          MockChannelProcessor cpXyz = new MockChannelProcessor("xyz", false);
          MockChannelProcessor cpAbc = new MockChannelProcessor("abc", true);
          List list = new Vector();
         list.add(cpXyz);
         list.add(cpAbc);
         cdm.setChannelProcessors(list);
         cdm.afterPropertiesSet();
 
         MockHttpServletRequest request = new MockHttpServletRequest();
         MockHttpServletResponse response = new MockHttpServletResponse();
         MockFilterChain chain = new MockFilterChain();
         FilterInvocation fi = new FilterInvocation(request, response, chain);
 
         ConfigAttributeDefinition cad = new ConfigAttributeDefinition();
         cad.addConfigAttribute(new SecurityConfig("xyz"));
 
         cdm.decide(fi, cad);
         assertTrue(fi.getResponse().isCommitted());
     }
 
     public void testDecideIteratesAllProcessorsIfNoneCommitAResponse()
         throws Exception {
         ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
         MockChannelProcessor cpXyz = new MockChannelProcessor("xyz", false);
         MockChannelProcessor cpAbc = new MockChannelProcessor("abc", false);
         List list = new Vector();
         list.add(cpXyz);
         list.add(cpAbc);
         cdm.setChannelProcessors(list);
         cdm.afterPropertiesSet();
 
         MockHttpServletRequest request = new MockHttpServletRequest();
         MockHttpServletResponse response = new MockHttpServletResponse();
         MockFilterChain chain = new MockFilterChain();
         FilterInvocation fi = new FilterInvocation(request, response, chain);
 
         ConfigAttributeDefinition cad = new ConfigAttributeDefinition();
         cad.addConfigAttribute(new SecurityConfig(
                 "SOME_ATTRIBUTE_NO_PROCESSORS_SUPPORT"));
 
         cdm.decide(fi, cad);
         assertFalse(fi.getResponse().isCommitted());
     }
 
     public void testDelegatesSupports() throws Exception {
         ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
         MockChannelProcessor cpXyz = new MockChannelProcessor("xyz", false);
         MockChannelProcessor cpAbc = new MockChannelProcessor("abc", false);
         List list = new Vector();
         list.add(cpXyz);
         list.add(cpAbc);
         cdm.setChannelProcessors(list);
         cdm.afterPropertiesSet();
 
         assertTrue(cdm.supports(new SecurityConfig("xyz")));
         assertTrue(cdm.supports(new SecurityConfig("abc")));
         assertFalse(cdm.supports(new SecurityConfig("UNSUPPORTED")));
     }
 
     public void testGettersSetters() {
         ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
         assertNull(cdm.getChannelProcessors());
 
         MockChannelProcessor cpXyz = new MockChannelProcessor("xyz", false);
         MockChannelProcessor cpAbc = new MockChannelProcessor("abc", false);
         List list = new Vector();
         list.add(cpXyz);
         list.add(cpAbc);
         cdm.setChannelProcessors(list);
 
         assertEquals(list, cdm.getChannelProcessors());
     }
 
     public void testStartupFailsWithEmptyChannelProcessorsList()
         throws Exception {
         ChannelDecisionManagerImpl cdm = new ChannelDecisionManagerImpl();
 
         try {
             cdm.afterPropertiesSet();
             fail("Should have thrown IllegalArgumentException");
         } catch (IllegalArgumentException expected) {
             assertEquals("A list of ChannelProcessors is required",
                 expected.getMessage());
         }
     }
 
     //~ Inner Classes ==========================================================
 
     private class MockChannelProcessor implements ChannelProcessor {
         private String configAttribute;
         private boolean failIfCalled;
 
         public MockChannelProcessor(String configAttribute, boolean failIfCalled) {
             this.configAttribute = configAttribute;
             this.failIfCalled = failIfCalled;
         }
 
         private MockChannelProcessor() {
             super();
         }
 
         public void decide(FilterInvocation invocation,
             ConfigAttributeDefinition config)
             throws IOException, ServletException {
             Iterator iter = config.getConfigAttributes();
 
             if (failIfCalled) {
                 fail("Should not have called this channel processor");
             }
 
             while (iter.hasNext()) {
                 ConfigAttribute attr = (ConfigAttribute) iter.next();
 
                 if (attr.equals(configAttribute)) {
                     invocation.getHttpResponse().sendRedirect("/redirected");
 
                     return;
                 }
             }
         }
 
         public boolean supports(ConfigAttribute attribute) {
             if (attribute.getAttribute().equals(configAttribute)) {
                 return true;
             } else {
                 return false;
             }
         }
     }
 }