public void WhenInitializeWalletWithRepeatedParValueCoins_ThenWalletShouldContainSumCoinsForGivenParValue(
            Coin[] inputCoins,
            Coin[] expectedCoins)
        {
            var wallet = new Wallet(inputCoins);

            foreach (var actualCoin in wallet.ShowCoins())
            {
                Assert.True(expectedCoins.Count(c => c.ParValue == actualCoin.ParValue && c.Count == actualCoin.Count) == 1);
            }
        }