}

    // Test init method
    @Test
    public void test_init() throws ServletException {
        FilterConfig filterConfig = new FilterConfig() {
            @Override
            public String getFilterName() {
                return "testFilter";
            }

            @Override
            public jakarta.servlet.ServletContext getServletContext() {
                return null;
            }

        /**
         * Gets the filter name for this SPNEGO configuration.
         *
         * @return The fully qualified class name of SpnegoAuthenticator
         */
        @Override
        public String getFilterName() {
            return SpnegoAuthenticator.class.getName();
        }

        /**
         * Gets the servlet context. This operation is not supported.
         *