gistfile1.rbx

describe 'A Collection' do
  subject { Collection.new }
  action  { clear }
  should_return_self
  should_clear_itself
end

gistfile2.txt

def should_return_self
  it "should return self" do
    collection = subject
    collection.instance_eval(&action).should equal(collection)
  end
end

def should_clear_itself
  it "should clear itself" do
    collection = subject
    collection << stuff
    collection.instance_eval(&action)
    collection.should be_empty
  end
end