public static String getResString(String key) {
        return getResStringDefault(key, RES_KEY_PFX + key + "]"); // $NON-NLS-1$
    }
@Test
    public void testGesResStringDefaultWithNonExistantKey() throws Exception {
        assertEquals("[res_key=noValidKey]", JMeterUtils.getResString("noValidKey"));
    }