Done(Panda, Tiger, Eagle)

[var114]

No description provided.

[jwo]

In RSpec, it has cool matchers that I like to point out. You could rewrite this methot as:

Vehicle.wheels.shouldbe_nil

[jwo]

Looks pretty great!

The only thing I wasn't 100% on was the self.wheels --- In it, you are setting a variable and returning it.

classVehicle@@wheels=0defself.wheels@@wheelsendend

Then in your motorcycle, you can override the @@wheels

classMotorcylcle < Vehicle@@wheels=2endVehicle.wheels=>0Motorcycle.wheels=>2

OR, possibly event simpler (but without using class variables):

classVehicleWHEEL_COUNT=0defself.wheelsWHEEL_COUNTendendclassMotorcycle < VehicleWHEEL_COUNT=2endputsMotorcycle.wheels=>2