升级到 Rails 6 后，rspec-rails 在 controller 测试中停止存根视图

Question

After upgrading my Rails application to version 6, rspec stopped stubbing view rendering. ( https://relishapp.com/rspec/rspec-rails/v/5-0/docs/controller-specs/views-are-stubbed-by-default )

I have tried several rspec and rspec-rails versions but result is always the same.

The expected behavior is that calling render should result in an empty string, but instead calling a controller action in spec is rendering the template like it would normally.

Calling render_views false in the example group has not effect. render_views? returns false in the example.

When I debug the controller action with binding.pry , in Rails 5, calling render returns "" . In Rails 6, calling render renders the real template.

the example is as simple as it can be:

      it "is success" do
        get 'index'
        expect(response).to be_successful
      end

Answer 1

Completing the loop here, OP figured out this within a GitHub issue:

https://github.com/rspec/rspec-rails/issues/2517

This was caused by setting view_paths in before_action callback and using this new path to set a layout on the controller. Apparently in previous versions of Rails this worked, but now it's necessary to set view_paths on class level (using prepend_view_paths or similar) for stubbing to work.