private static final long serialVersionUID = 1L;

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

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

    // Test with null values
    @Test
    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);

     * The value is, e.g.  <br>
     * comment: Hostname for the mail server.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getMailHostname();

    /**
     * Get the value for the key 'mail.hostname' as {@link Integer}. <br>
     * The value is, e.g.  <br>
     * comment: Hostname for the mail server.