describe :queue_enq, shared: true do it "adds an element to the Queue" do q = @object.call q.size.should == 0 q.send @method, Object.new q.size.should == 1 q.send @method, Object.new q.size.should == 2 end it "is an error for a closed queue" do q = @object.call q.close lambda { q.send @method, Object.new }.should raise_error(ClosedQueueError) end end