Assert against `ActionMailer::Base.deliveries` relatively.

- Look for a `change` in its size rather than asserting against an actual size. - This previously failed because another spec had an email in `ActionMailer::Base.deliveries`, which failed this `be_nil` assertion.

Assert against `ActionMailer::Base.deliveries` relatively.
f617bd76 · Timothy Andrew · 0d68e199 · f617bd76
Commit f617bd76 authored Jul 05, 2016 by Timothy Andrew
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registrations_controller_spec.rb spec/controllers/registrations_controller_spec.rb +1 -2

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--- a/spec/controllers/registrations_controller_spec.rb
+++ b/spec/controllers/registrations_controller_spec.rb
@@ -14,8 +14,7 @@ describe RegistrationsController do
      before { allow_any_instance_of(ApplicationSetting).to receive(:send_user_confirmation_email).and_return(false) }

      it 'logs user in directly' do
-        post(:create, user_params)
-        expect(ActionMailer::Base.deliveries.last).to be_nil
+        expect { post(:create, user_params) }.not_to change{ ActionMailer::Base.deliveries.size }
        expect(subject.current_user).not_to be_nil
      end
    end