Small internal DSL in unit tests

gistfile1.cs

[TestMethod]
public void It_uses_more_specific_rule_if_rule_and_information_is_present()
{
    Given(new ProductType("air", null, ProductCategory.AirOnly),
            new ProductType("air", "someSpecialWeirdProduct", ProductCategory.LandOnly))
        .ItMaps(new ProductReference("air", "someSpecialWeirdProduct"))
        .To(ProductCategory.LandOnly);
}