### Question:
EthUtil { public static BigDecimal gweiToEth(Long gwei) { return weiToEther(gweiToWei(gwei)); } private  EthUtil(); static EthWalletKey generateNewAccount(); static BigDecimal weiToEther(BigInteger wei); static Long ethToGwei(BigDecimal ether); static BigInteger etherToWei(BigDecimal ether); static BigInteger gweiToWei(Long gwei); static BigDecimal gweiToEth(Long gwei); static BigDecimal atmToEth(Long apl); static Long atmToGwei(Long apl); static Long gweiToAtm(Long gwei); static BigDecimal fromAtm(BigDecimal ix); static boolean isAddressValid(String address);  }### Answer:
@Test void gweiToEth() { BigDecimal eth = EthUtil.gweiToEth(GWEI); assertEquals(ETH, eth); }