I tried many ways but cannot seem to be able to mock the instance variable in the test in my request test @somevariable – this is initialized in different controler though or on edit but i want to specifically test new how can i mock it?

class SomeController do
  def new
      ....
    end
  end
end

  context 'something' do
    before do
      get send("new_url", **param)
    end


     it { is_expected.to have_http_status(:success) }
  end

to @somevariable be mocked or initialized within the test using factory or somehting