assertEquals(0, authenticators.length);
    }

    // Test getSsoType() with actual FessConfig
    @Test
    public void test_getSsoType_withFessConfig() {
        final String expectedSsoType = "openid";
        FessConfig fessConfig = new FessConfig.SimpleImpl() {
            @Override
            public String getSsoType() {
                return expectedSsoType;
            }
        };

            @Override
            public String getOsddLinkEnabled() {
                return "auto";
            }

            @Override
            public String getSsoType() {
                return "none";
            }
        });
        final OsddHelper osddHelper = new OsddHelper();
        osddHelper.setContentType("application/opensearchdescription+xml");
        osddHelper.init();

        return Constants.TRUE.equalsIgnoreCase(value);
    }

    default void setSsoType(final String value) {
        setSystemProperty(Constants.SSO_TYPE_PROPERTY, value);
    }

    default String getSsoType() {
        return getSystemProperty(Constants.SSO_TYPE_PROPERTY, Constants.NONE);
    }

    //
    // fess_*.properties
    //

    String getAuthenticationAdminRoles();

        form.searchUseBrowserLocale = fessConfig.isBrowserLocaleForSearchUsed() ? Constants.TRUE : Constants.FALSE;
        form.ssoType = fessConfig.getSsoType();
        form.appValue = fessConfig.getAppValue();
        form.defaultLabelValue = fessConfig.getDefaultLabelValue();
        form.defaultSortValue = fessConfig.getDefaultSortValue();