Partial setup class for CustomerTestsExcel framework

SpecificationSpecificClassWithCustomPropertyPartial.cs

public partial class SpecificationSpecificClassWithCustomProperty
{
  internal SpecificationSpecificClassWithCustomProperty CustomInt_of(int customInt)
  {
    // The framework requires you to do this
    AddValueProperty(GetCurrentMethod(), customInt);

    // And then you can do some custom thing with `value` here
    // classWithCustomProperty.Setup(m => m.Name).Returns(customInt.ToString());

    // The framework requires you to do this (the syntax is fluent)
    return this;
  }
}