@Test
public void testGetForwardAndInverseKeys_tiePointCoding_forwardKey() {

    final String forwardKey = System.getProperty(SYSPROP_OLCI_TIE_POINT_CODING_FORWARD);
    try {
        System.setProperty(SYSPROP_OLCI_TIE_POINT_CODING_FORWARD, "YEAH!");
        final String[] codingKeys = OlciProductFactory.getForwardAndInverseKeys_tiePointCoding();
        assertEquals("YEAH!", codingKeys[0]);
        assertEquals("INV_TIE_POINT", codingKeys[1]);
    } finally {
        if (forwardKey != null) {
            System.setProperty(SYSPROP_OLCI_TIE_POINT_CODING_FORWARD, forwardKey);
        } else {
            System.clearProperty(SYSPROP_OLCI_TIE_POINT_CODING_FORWARD);
        }
    }
}