[prusswan]

Not sure if you are aware of this...for the first edition of your tutorial, webrat is required for many of the tests (I tested on ubuntu/windows), but inclusion of webrat will actually break some of the new tests (like those using have_selector) in the second edition. You might want to add a warning to those who have followed the first edition and are trying to incorporate the additions in the second edition.

[mhartl]

The 2nd edition explicitly uses Capybara instead of Webrat. As long as people pay attention to their Gemfiles, they should be fine.

[prusswan]

It would be nice if you can discuss the differences, like how Capybara is meant for integration tests, and replacement for have_template etc. At some sections the tests are still referred to controller tests (Listing 10.46) although it looks like you intend to convert them all to integration tests.

[prusswan]

Also, 11.37 tests do not work with valid_sign_in (using session authentication), but works with the controller.sign_in method introduced in 1e.