class SendTableDispatch attr_reader :event_log def initialize @event_log = [] end def self.method_added_cheat(method_name) if method_name.to_s =~ /^handle_(.+)$/ handler_methods[$1.to_sym] = method_name.to_sym end # Cheating here, because Opal does not support method_added hook yet # Uncomment the super below when it does: # super end def self.handler_methods @handler_methods ||= {} end def call(event) if (handler_method = self.class.handler_methods[event.name]) __send__(handler_method, event) end end def handle_foo(event) event_log << event end def handle_bar(event) event_log << event end def handle_baz(event) event_log << event end end klass = SendTableDispatch event = Struct.new(:name, :source, :args) # Cheating here, because Opal does not support method_added hook yet klass.method_added_cheat(:handle_foo) klass.method_added_cheat(:handle_bar) klass.method_added_cheat(:handle_baz) 100_000.times do obj = klass.new obj.call(e1 = event[:foo]) obj.call(e2 = event[:bar]) obj.call(e3 = event[:baz]) obj.call(event[:buz]) unless obj.event_log == [e1, e2, e3] raise "#{klass}: #{obj.event_log.inspect}" end end