given nunit example

when_building_a_toyota

[Story(AsA = "car manufacturer",
       IWant = "a factory that makes the right cars",
       SoThat = "I can make money")]
public class building_a_toyota : Scenario
{
    static CarFactory _factory;
    static Car _car;

    given a_car_factory = () =>
    {
        _factory = new CarFactory();
    };

    when building_a_car = () => _car = _factory.Make(CarType.Toyota);

    [then]
    public void it_should_create_a_car()
    {
        _car.ShouldNotBeNull();
    }

    [then]
    public void it_should_be_the_right_type_of_car()
    {
        _car.Type.ShouldEqual(CarType.Toyota);
    }
}