assertEquals("aaa", systemHelper.normalizeConfigPath("regexpCase:aaa"));
        assertEquals("(?i)aaa", systemHelper.normalizeConfigPath("regexpIgnoreCase:aaa"));
    }

    @Test
    public void test_getFilteredEnvMap() {
        Map<String, String> filteredEnvMap = systemHelper.getFilteredEnvMap("^FESS_ENV.*");
        assertEquals(0, filteredEnvMap.size());

        envMap.put("FESS_ENV_TEST", "123");