@Test
public void testObjectBasic() {

  // when
  final WalletApi walletApi1 = supplyWalletApi();
  final WalletApi walletApi2 = supplyWalletApi();
  // to string
  assertNotNull(walletApi1.toString());
  // equals
  assertNotEquals(walletApi1, walletApi2);
  // hashcode
  assertEquals(walletApi1.hashCode(), walletApi1.hashCode());
  assertNotEquals(walletApi1.hashCode(), walletApi2.hashCode());
}