如何在控制器中测试特定方法

Question

I have a spec in my controller called clone in which I take a user and clone the duplicate the user.

What I need to do is within my controller (my model is player and so controller is player_controller.rb , I need to test a specific method listed below.

def clone
  new_player = @player.dup
  new_player.id = nil
  new_player.serial = nil
  new_player.name = "Copy of #{@player[:name]}"
end

describe '#clone' do
  it 'creates a clone of an existing player' do
    new_player = player.dup
  end
end

Sure what I have done in my spec is mirror the first line in the method within the controller, and so it creates a new player for me, but it doesn't update the additional features of the spec such as the name. And that is what I am having trouble. How can I specifically call out a method within my controller?

I've tried

new_player = player.controller.send(:clone)

as well as

new_player = player.(:clone)

The first error does not recognize clone and the second error states that I am getting an undefined method "call" for player. (I don't quite understand that error)

Would anybody know how to pull that guy out so I can test it?

Much appreciated.

Answer 1

In the end your controller is nothing but a Ruby class. Create an instance of it and call the method clone for the object you just created.

PlayerController.new.clone

or

PlayerController.new.send(:clone)

The issue I see here is, from where is the @player getting initialised? There will be no constructor for this class(as it is a controller). If there is some other method say 'my_test_method', that initialises it. Then call that method first on the PlayerController object and then call the clone method on the same object.

my_object = PlayerController.new
my_object.my_test_method
my_object.clone

If the clone method is getting called from an action where @player is set. Then include the specs for this method as part of the specs you are writing for that action.