How to mock an instance method of an already mocked object?

Question

I need to mock the following:

Class User
  def facebook
    #returns an instance of a facebook gem
  end
end

So in my User tests, to access

Answer 1

If you don't want to check that all the methods are called, you can also use different alternatives to mocking. For instance, you can use an OpenStruct.

@user = Factory(:user)
facebook = mock()
me = mock()
me.expects(:info).returns({"name" => "John Doe"})
facebook.expects(:me).returns(me)
@user.expects(:facebook).returns(facebook)
assert_equal "John Doe", @user.facebook.me.info["name"]

becomes

@user = Factory(:user)
@facebook = OpenStruct.new(:me => OpenStruct.new(:info => {:name => "John Doe"}))
@user.expects(:facebook).returns(@facebook)

This solution also offers you the advantage that you can change the @facebook properties in your tests, if you need to test different conditions.