protected  void setUp() 
{
        this.container = new AbstractContainer()
        {
            public String getName()
            {
                return "test container";
            }
            public int getPort()
            {
                return 8080;
            }
            public void startUp()
            {
            }
            public void shutDown()
            {                
            }
        };
}

 public  void testCreateFilterChainOk() throws Exception 
{
        String testInputDirProperty = System.getProperty("testinput.dir");
        assertTrue("The system property 'testinput.dir' must be set",
            testInputDirProperty != null);
        File testInputDir = new File(testInputDirProperty);
        assertTrue("The system property 'testinput.dir' must point to an "
            + "existing directory", testInputDir.isDirectory());
        String fileName = 
            "org/apache/cactus/integration/ant/cactified.ear";
        File earFile = new File(testInputDir, fileName);
        assertTrue("The test input " + fileName + " does not exist",
            earFile.exists());
        this.container.setDeployableFile(EarParser.parse(earFile));
        // Note that we needed to add a last character to the string
        // after the @cactus.context@ token as otherwise the Ant code 
        // fails! It looks like an Ant bug to me...       
        String buffer = "@cactus.port@:@cactus.context@:";
        FilterChain chain = this.container.createFilterChain();        
        ChainReaderHelper helper = new ChainReaderHelper();
        Vector chains = new Vector();
        chains.addElement(chain);
        helper.setFilterChains(chains);
        helper.setPrimaryReader(new StringReader(buffer));
        Reader reader = helper.getAssembledReader();       
        assertEquals("8080:empty:", helper.readFully(reader));
}

Verify that the Ant filter chain is correctly configured to replace the "cactus.port" and "cactus.context" tokens.