private static final long serialVersionUID = 1L;

                @Override
                public String getMailHostname() {
                    return hostname;
                }
            });

            assertEquals(hostname, ComponentUtil.getFessConfig().getMailHostname());
        }
    }

    // Test with null values
    public void test_nullValues() {

            }

            @Override
            public boolean hasNotification() {
                return false;
            }

            @Override
            public String getMailHostname() {
                return "mail-host";
            }

            @Override
            public String getNotificationTo() {
                return "******@****.***";
            }

                dataMap.put(StringUtil.decapitalize(entry.getKey()), entry.getValue());
            }

            String hostname = fessConfig.getMailHostname();
            if (StringUtil.isBlank(hostname)) {
                hostname = ComponentUtil.getSystemHelper().getHostname();
            }
            dataMap.put("hostname", hostname);