Provide a default value (Mock.new) for stub_const.
Created by: stevenharman
Currently you are required to provide a value for the stubbed constant, but there are times that I don't actually care what it is because I'm just going to stub the usage of the constant anyhow. For example:
stub_const('DeathStar', stub)
Starship.stub(:status) { :operational }
This allows you to
stub_const('DeathStar')
Starship.stub(:status) { :operational }
# or
stub_const('DeathStar').stub(:status) { :operational }