dockyard/capybara-email — pull request #11 by ngauthier (2012-11-06 18:33:33+00:00)
Title: Mail and Capybara are runtime requirements

The gemspec only shows them as development dependencies. When I added it to a project, Mail was not defined, since it was not required yet by the project.

I've changed mail and capybara in the gemspec as well as requiring the libraries in the gem's source.

Tests pass and fixed my problem.