Stub a controller private method containing arguments

controller code:

class BooksController < ApplicationController
def index
param1, param2 = “123”, “456”
@test = method_1(param1, param2)
end

private
def method_1(param1, param2)
return “test”
end
end

controller tests

describe “GET index” do
it “get books” do
param1, param2 = “12334”, “456233”
controller.stub!(:method_1).with(param1,param2).and_return(“test”)
get :index
assert_response :success
assigns(:test).should eq(“test”)
end
end

How to stub a controller private method which will take different
arguments
If we pass “123”, “456” set, then the test will pass
For ex: method_1 should accept “12334”, “456233” arguments
Any help is appreciated.

Thanks in advance
jeevan