@Test
public void testCopyFromWithRawBytes() {

  final byte[] filledValue = randomUUID().toString().getBytes();
  final byte[] emptyValue = new byte[0];
  final byte[] nullValue = null;
  assertEquals(ByteString.copyFrom(filledValue), copyFrom(filledValue));
  assertEquals(ByteString.EMPTY, copyFrom(emptyValue));
  assertEquals(ByteString.EMPTY, copyFrom(nullValue));
}