public void CalculateFee_WhenInputIsCorrect_ShouldReturnCorrectValue(float rate, float transactionAmount, float expectedFee)
{
// Arrange
var transaction = new Transaction("X", DateTime.Now, (decimal)transactionAmount);
var fee = new PercentageFee((decimal)rate);
// Act
var result = fee.CalculateFee(transaction);
// Assert
Assert.NotNull(result);
Assert.Equal((decimal)expectedFee, result.Amount);
}
public void CalculateFee_ShouldCopyMerchantNameAndDateToFee()
{
// Arrange
var transaction = new Transaction("X", DateTime.Now, 100M);
var fee = new PercentageFee(0.5M);
// Act
var result = fee.CalculateFee(transaction);
// Assert
Assert.NotNull(result);
Assert.Equal(transaction.MerchantName, result.MerchantName, StringComparer.Ordinal);
Assert.Equal(transaction.Date, result.Date);
}