// Verify the inner SpnegoConfig class exists and is properly named
        // This test ensures the typo fix (SpengoConfig -> SpnegoConfig) is correct
        try {
            Class<?> configClass = Class.forName("org.codelibs.fess.sso.spnego.SpnegoAuthenticator$SpnegoConfig");
            assertNotNull(configClass);
            assertEquals("SpnegoConfig", configClass.getSimpleName());

     * authentication modules, and security options.
     */
    protected static class SpnegoConfig implements FilterConfig {

        /**
         * Constructs a new SPNEGO filter configuration.
         */
        public SpnegoConfig() {
            // do nothing
        }

        /**
         * Gets the filter name for this SPNEGO configuration.
         *