return StringUtil.EMPTY;
            }
        });
        getMockRequest().setLocale(Locale.ENGLISH);
        assertNull(systemHelper.getForumLink());
    }

    @Test
    public void test_getHelpLink() {
        getMockRequest().setLocale(Locale.ENGLISH);
        assertEquals("https://fess.codelibs.org/98.76/admin/xxx-guide.html", systemHelper.getHelpLink("xxx"));
        getMockRequest().setLocale(Locale.JAPANESE);