mock_auth doesn't redirect to success url with rspec 3.7.0

[anaumov]

Configuration

• Provider Gem: omniauth-1.7.1
• Ruby Version: 2.4.2p198
• Framework: rails (5.1.4)
• Platform: mac

Expected Behavior

When using mock_auth I expect to all requests to twiiter API will redirected to success url immediately.

Actual Behavior

After updating to rspec 3.7.0 mock_auth stops intercept requests to twitter API. It prompt twitter form to user (capybara).

Steps to Reproduce

use rspec 3.7.0 with capybara and omniauth.

[juno]

@anaumov
I faced same issue and it fixed with modify puma config like this:

# config/puma.rb
if  ENV.fetch('RAILS_ENV') { 'development' } == 'test' # Don't use Rails.env
  # Disable cluster mode while test
  workers 0
else
  workers ENV.fetch('WEB_CONCURRENCY') { 2 }
end

Hope this helps.

Updated:
Now, I fetch current Rails env through the environment variable.
Because of puma crashes during boot up in production if puma.rb contains Rails constant.

20:43:52 web.1   |  bundler: failed to load command: puma (/Users/juno/src/qnyp/vendor/bundle/ruby/2.4.0/bin/puma)
20:43:52 web.1   |  NameError: uninitialized constant #<Class:#<Puma::DSL:0x00007fec0c31e8e0>>::Rails
20:43:52 web.1   |    ./config/puma.rb:24:in `_load_from'