Rails 4: Cannot use '--format progess' when class is named 'Progress'

[chrisroos]

This looks similar to cucumber issue 345[1] and has re-appeared after upgrading our Rails 3.2 app to Rails 4 (i.e. this works fine against Rails 3.2).

I'm adding this issue against cucumber-rails even though I have tracked the problem down to the Cucumber::Constantize#constantize auto-loading magic in cucumber itself.

To replicate:

* Create a new Rails 4 project
* Add cucumber-rails and database_cleaner to the Gemfile

$ bundle install
$ rails g cucumber:install
$ rails g model:progress
$ rake db:migrate

$ cucumber --format=progress
#=> wrong number of arguments (3 for 1)
#=> Error creating formatter: progress (ArgumentError)

I've also created a dummy Rails 4 app to illustrate the problem: https://github.com/chrisroos/rails-4-and-cucumber

[1] cucumber/common#345

[mattwynne]

I think this should be fixed by Cucumber 1.3.5, which I just released. Can you please try it?

[mattwynne]

Actually that may be bollocks but please try anyway! :)

[Kosmas]

@mattwynne just tried it and still gives an error:

wrong number of arguments (3 for 0..2) 
Error creating formatter: progress (ArgumentError)

and the runtime dependency for cucumber is >= 1.3.8

[mattwynne]

I've done some investigation today. It seems that Rails 4 changes the behaviour of Object.const_get / Object.const_missing? to search up and return constants from parent namespaces if the specific constant asked for can't be found.

We've been relying on the behaviour of these methods to automatically require the formatter only where necessary. I guess we'll have to change this. @tooky something to think about for 2.0 as we change the way formatters get loaded, eh?

The workaround is to include this line somewhere in features/support:

require 'cucumber/formatter/progress'

@chrisroos thanks for logging this and making the test repo - that really helped me to investigate it. Mind if we close this now?

[chrisroos]

I've just had a little play and can see that adding require 'cucumber/formatter/progress' to features/support/progress-formatter.rb does the trick.

I'm more than happy for you to close the issue, @mattwynne.