Scope.md

Doubles, stubs, and message expectations are all cleaned out after each example. This ensures that each example can be run in isolation, and in any order.

before(:each)

It is perfectly fine to set up doubles, stubs, and message expectations in a before(:each) hook, as that hook is executed in the scope of the example:

before(:each) do
  @account = double('account')
end

Do not create doubles, stubs, or message expectations in before(:all)

If you do, they'll get cleaned out after the first example, and you will be very confused as to what's going on in the second example.