public void ForNullMoney_ShouldFailValidation()
{
// arrange
var sut = new InvoiceLine(ValidProductName, null);
// act
var validationResult = sut.Validate();
// assert
validationResult.Should().ContainSingle(InvoiceLine.ValidationRules.Money.Name);
}
public void ForEmptyProductName_ShouldFailValidation()
{
// arrange
var sut = new InvoiceLine(string.Empty, ValidMoney);
// act
var validationResult = sut.Validate();
// assert
validationResult.Should().ContainSingle(InvoiceLine.ValidationRules.ProductName.Name);
}