}

    // Test with no Origin header
    public void test_doFilter_noOriginHeader() throws IOException, ServletException {
        mockRequest.setHeader("Origin", null);

        corsFilter.doFilter(mockRequest, mockResponse, mockFilterChain);

        assertTrue(mockFilterChain.wasDoFilterCalled());
        assertFalse(corsHandlerFactory.wasGetCalled());
    }

    // Test with blank Origin header

                if (ntlm == null) {
                    chain.doFilter(request, response);
                }
            }
        };

        customFilter.init(filterConfig);
        customFilter.doFilter(request, response, filterChain);

        // Should proceed without authentication when skipAuthentication is true
        verify(filterChain).doFilter(request, response);

        try {
            webApiFilter.doFilter(request, response, chain);
            fail("Expected ServletException");
        } catch (IOException e) {
            fail("Unexpected IOException: " + e.getMessage());
        } catch (ServletException e) {
            assertEquals("Test ServletException", e.getMessage());
        }
    }

    // Test doFilter when chain.doFilter throws IOException

     * @param chain The filter chain
     * @throws IOException If an I/O error occurs
     * @throws ServletException If a servlet error occurs
     */
    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        final WebApiManagerFactory webApiManagerFactory = ComponentUtil.getWebApiManagerFactory();

    /**
     * HTTP OPTIONS method constant used for CORS preflight requests.
     */
    protected static final String OPTIONS = "OPTIONS";

    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        final HttpServletRequest httpRequest = (HttpServletRequest) request;

    }

    /**
     * This method simply calls {@code negotiate( req, resp, false )}
     * and then {@code chain.doFilter}. You can override and call
     * negotiate manually to achive a variety of different behavior.
     */
    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {

     * @throws IOException if an I/O error occurs during processing
     * @throws ServletException if a servlet error occurs
     */
    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {
        final HttpServletRequest req = (HttpServletRequest) request;

    }

    /**
     * This method simply calls {@code negotiate( req, resp, false )}
     * and then {@code chain.doFilter}. You can override and call
     * negotiate manually to achive a variety of different behavior.
     */
    @Override
    public void doFilter(final ServletRequest request, final ServletResponse response, final FilterChain chain)
            throws IOException, ServletException {

            response.getWriter().write("Complex response");
            chain.doFilter(request, response);
        }
    }

    // Test helper classes

    private static class TestFilterChain implements FilterChain {
        private boolean doFilterCalled = false;

        @Override
        public void doFilter(ServletRequest request, ServletResponse response) throws IOException, ServletException {