public static bool TryCreate(string invoiceReferenceNumber, out InvoiceReferenceNumber result, out string failureReason)
{
var specification = new InvoiceReferenceNumberSpecification();
if (specification.IsSatisfiedBy(invoiceReferenceNumber))
{
result = new InvoiceReferenceNumber(invoiceReferenceNumber);
failureReason = string.Empty;
return true;
}
result = null;
failureReason = specification.GetReasonsForDissatisfactionSeparatedWithNewLine();
return false;
}
public static InvoiceReferenceNumber Create(string invoiceReferenceNumber)
{
if (invoiceReferenceNumber == null)
{
throw new ArgumentNullException("invoiceReferenceNumber");
}
var specification = new InvoiceReferenceNumberSpecification();
if (specification.IsSatisfiedBy(invoiceReferenceNumber))
{
return new InvoiceReferenceNumber(invoiceReferenceNumber);
}
throw new ArgumentException(string.Format("Invoice reference number '{0}' does not satisfy specification.", invoiceReferenceNumber), "invoiceReferenceNumber");
}
private static void AssertDissatisfiedSpecification(int value)
{
var specification = new InvoiceReferenceNumberSpecification();
Assert.IsFalse(specification.IsSatisfiedBy(value));
Assert.IsFalse(string.IsNullOrWhiteSpace(specification.GetReasonsForDissatisfactionSeparatedWithNewLine()));
}
private void AssertValidValue(int value)
{
InvoiceReferenceNumber.Create(value);
var specification = new InvoiceReferenceNumberSpecification();
Assert.IsTrue(specification.IsSatisfiedBy(value));
}