assertEquals(0, filteredEnvMap.size());

        envMap.put("FESS_ENV_TEST", "123");
        filteredEnvMap = systemHelper.getFilteredEnvMap("^FESS_ENV.*");
        assertEquals(1, filteredEnvMap.size());
        assertEquals("123", filteredEnvMap.get("FESS_ENV_TEST"));

        filteredEnvMap = systemHelper.getFilteredEnvMap("^XFESS_ENV.*");