@wied03@elia not sure where to report this, but I just down graded from opal 9x to opal 8x, and neither opal-rspec or opal-rails reported an issue, but stayed at version 0.9. As a result I had one test spec failing due to this error:
ActionView::Template::Error: undefined method `load_asset' for Opal::Sprockets:Module
once I forced forced opal-rails back to 0.8.1 everything was fine... seems like or both gems requires opal >= 0.8??
I'm reporting here, because I'm not sure when gem should get the issue...