// now test a null EthernetAddress case with extra data in the array
ethernet_address = new EthernetAddress(0L);
test_array =
new byte[ETHERNET_ADDRESS_ARRAY_LENGTH + EXTRA_DATA_LENGTH];
Arrays.fill(test_array, (byte)'x');
ethernet_address.toByteArray(test_array, 0);
assertEthernetAddressArraysAreEqual(
NULL_ETHERNET_ADDRESS_BYTE_ARRAY, 0, test_array, 0);
for (int i = 0; i < EXTRA_DATA_LENGTH; i++) {
assertEquals("Expected array fill value changed",
(byte)'x',