require File.expand_path('../../../spec_helper', __FILE__) require File.expand_path('../fixtures/classes', __FILE__) describe "Observer#add_observer" do before :each do @observable = ObservableSpecs.new @observer = ObserverCallbackSpecs.new end it "adds the observer" do @observer.value.should == nil @observable.changed @observable.notify_observers("test") @observer.value.should == nil @observable.add_observer(@observer) @observable.changed @observable.notify_observers("test2") @observer.value.should == "test2" end end