@Test
public void testGetForwardAndInverseKeys_pixelCoding_inverseCoding() {

    final String inverseKey = System.getProperty(SYSPROP_OLCI_PIXEL_CODING_INVERSE);
    try {
        System.setProperty(SYSPROP_OLCI_PIXEL_CODING_INVERSE, "jippie");
        final String[] codingKeys = OlciProductFactory.getForwardAndInverseKeys_pixelCoding();
        assertEquals("FWD_PIXEL", codingKeys[0]);
        assertEquals("jippie", codingKeys[1]);
    } finally {
        if (inverseKey != null) {
            System.setProperty(SYSPROP_OLCI_PIXEL_CODING_INVERSE, inverseKey);
        } else {
            System.clearProperty(SYSPROP_OLCI_PIXEL_CODING_INVERSE);
        }
    }
}