Improve controller template when no action

[ThHareau]

Fix for #2375

A generated file looks like this:

require 'rails_helper'

RSpec.describe "Posts", type: :request do
  describe "GET /index" do
    it "returns http success" do
      pending "add some scenarios (or delete) #{__FILE__}"
    end
  end
end

[ThHareau]

Made with @tsleal29, @yann120, @fwuensche and @musait

[pirj]

Amazing, thanks!
Just a few edits away from getting it done.

[pirj]

Not specifically related to this pull request.

I'm slightly opposed to adding "returns http success" in request specs. From my point of view, they should test more than just http statuses, and providing this as a reference example in the template is promoting a dubious practice.

[ThHareau]

Indeed. Maybe I can update the template for that as well? Do you have an idea regarding what we can provide?

I'm thinking to exists or is reachable (I have a preference for the second option)

[pirj]

Maybe "returns a list of #{class_name.pluralize.downcase}"? At least this is what an "index" originally means.

[pirj]

update the template for that as well

That would be very helpful!

[benoittgt]

CI errors are on JRuby and unreleated. Your patch looks good to me. Thanks @pirj for the review :)

Thanks @ThHareau, @tsleal29, @yann120, @fwuensche and @musait

[pirj]

Thanks!