Stub a call to Rails.application.config_for with Rspec?

Question

I have a method with the following line:

permissions = Rails.application.config_for(:admin_auth)

It reads the file config/admin_auth.yml and returns a Hash that I use later in the the same method.

The problem is that in order to test this method I need to give different values to permissions but I can not find the way to stub the Rails.application.config_for call.

I tried:

allow(Rails::Application).to receive(:config_for) { { admin: 'super_admin' } }

But I get an error.

Answer 1

Try:

allow_any_instance_of(Rails::Applcation).to ...

or

allow(Rails.application).to ...