diff --git a/core/src/test/java/org/acegisecurity/ui/x509/X509ProcessingFilterTests.java b/core/src/test/java/org/acegisecurity/ui/x509/X509ProcessingFilterTests.java
new file mode 100644
index 0000000000..d6ba20eb87
--- /dev/null
+++ b/core/src/test/java/org/acegisecurity/ui/x509/X509ProcessingFilterTests.java
@@ -0,0 +1,116 @@
+package net.sf.acegisecurity.ui.x509;
+
+import junit.framework.TestCase;
+
+//import org.mortbay.http.*;
+//import org.mortbay.jetty.servlet.*;
+
+import java.net.URL;
+import java.io.IOException;
+import java.security.cert.X509Certificate;
+
+import net.sf.acegisecurity.*;
+import net.sf.acegisecurity.context.security.SecureContext;
+import net.sf.acegisecurity.context.security.SecureContextUtils;
+import net.sf.acegisecurity.context.security.SecureContextImpl;
+import net.sf.acegisecurity.context.ContextHolder;
+import net.sf.acegisecurity.providers.x509.X509TestUtils;
+import net.sf.acegisecurity.ui.cas.CasProcessingFilter;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.ServletException;
+
+/**
+ * @author Luke
+ */
+public class X509ProcessingFilterTests extends TestCase {
+    //~ Constructors ===========================================================
+
+    public X509ProcessingFilterTests() {
+        super();
+    }
+
+    public X509ProcessingFilterTests(String arg0) {
+        super(arg0);
+    }
+
+    //~ Methods ================================================================
+
+    public final void setUp() throws Exception {
+        super.setUp();
+    }
+
+    public void testNormalOperation() throws Exception {
+        MockHttpServletRequest request = new MockHttpServletRequest(null, new MockHttpSession());
+        MockHttpServletResponse response = new MockHttpServletResponse();
+        FilterChain chain = new MockFilterChain();
+
+        request.setAttribute("javax.servlet.request.X509Certificate",
+                new X509Certificate[] {X509TestUtils.buildTestCertificate()});
+
+        MockAuthenticationManager authMgr = new MockAuthenticationManager(true);
+
+        ContextHolder.setContext(new SecureContextImpl());
+
+        SecureContext ctx = SecureContextUtils.getSecureContext();
+
+        ctx.setAuthentication(null);
+
+        X509ProcessingFilter filter = new X509ProcessingFilter();
+
+        filter.setAuthenticationManager(authMgr);
+        filter.afterPropertiesSet();
+        filter.init(null);
+        filter.doFilter(request, response, chain);
+
+        Authentication result = ctx.getAuthentication();
+
+        assertNotNull(result);
+    }
+
+    //~ Inner Classes ==========================================================
+
+    private class MockFilterChain implements FilterChain {
+        public void doFilter(ServletRequest arg0, ServletResponse arg1)
+            throws IOException, ServletException {
+                // do nothing.
+        }
+    }
+//    public void testFilterIntegration() throws Exception {
+//
+//        // set up server.
+//        HttpServer server = new HttpServer();
+//        try {
+//            SunJsseListener listener = new SunJsseListener();
+//            listener.setNeedClientAuth(true);
+//            listener.setPort(9443);
+////            listener.setKeystore();
+//
+//            server.addListener(listener);
+//
+//            // map servlet.
+//            HttpContext context = server.getContext("/");
+//
+////            ServletHandler handler = new ServletHandler();
+////            handler.addServlet("MyServlet", "/myServlet", MyServlet.class.getName());
+////            context.addHandler(handler);
+//
+//            // start server.
+//            server.start();
+//
+//            // test client code against url.
+//            URL url = new URL("http://localhost:" + 9443 + "/myServlet");
+//
+//
+//
+//        }
+//        finally {
+//          server.stop();
+//        }
+//    }
+
+
+
+}