public void AcceptCoins_HavingZeroCurrentAndTotalCoins_GivenUnknown_AddUnknownToReturnCoinsAndReturnsInsertCoinMessage()
{
// Arrange
var unknown = new Coin(.99M, .99M);
// Act
var result = _sut.AcceptCoins(unknown);
// Assert
Assert.AreEqual(decimal.Zero, SessionHelper.CurrentCoins.TotalValue());
Assert.AreEqual(decimal.Zero, SessionHelper.TotalCoins.TotalValue());
Assert.AreEqual(1, SessionHelper.ReturnCoins[Denominations.Unknown]);
Assert.IsNotNull(result);
Assert.AreEqual(MessageConstants.InsertCoin, result);
}
