@Test
public void testToString() {

       ECKey key = ECKey.fromPrivate(BigInteger.TEN); // An example private key.
       assertEquals("pub:04a0434d9e47f3c86235477c7b1ae6ae5d3442d49b1943c2b752a68e2a47e247c7893aba425419bc27a3b6c7e693a24c696f794c2ed877a1593cbee53b037368d7", key.toString());
}