### Question:
EthUtil { public static BigDecimal weiToEther(BigInteger wei) { return Convert.fromWei(wei.toString(), Convert.Unit.ETHER); } 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 weiToEther() { BigDecimal eth = EthUtil.weiToEther(WEI); assertEquals(ETH, eth); }