Mocking 'checkout.session.completed' giving undefined method `exists?' for File:Class

[buckled0]

As the title suggests I'm trying to test the webhook checkout.session.completed but each time it runs I'm getting the following error:

NoMethodError:
       undefined method 'exists?' for File:Class

Here is my test code, it looks like what the docs give me but I can't seem to get it to work:

let(:event) do
      StripeMock.mock_webhook_event('checkout.session.completed', {
        client_reference_id: client.reference_id,
        subscription: subscription.id,
        customer_details: { email: user.email }
      })
    end

Currently using version 3.1.0.rc2

[gregmolnar]

@buckled0 Could you please try this on master?

[codrutzu]

File.exists? was removed in ruby 3.2

ruby/ruby@bf97415