Dom exceptions with capybara 2.1

[mariovisic]

After upgrading to capybara 2.1 and running on the HEAD version of capybara-webkit, i'm running into some errors.

One in particular seems to occur for CSS selectors that are more than 1 level deep, eg this fails:

find('.list-items .list-item:first')

The error Capybara::Webkit::InvalidResponseError: SYNTAX_ERR: DOM Exception 12 is thrown

changing the code to this seems to work fine:

find('.list-items').first('.list-item')

[mhoran]

As of Capybara 2.1, CSS selectors are no longer translated to XPath via Nokogiri. :first is not a valid CSS selector, but it seems that Nokogiri translates this to an appropriate XPath query. Given that CSS selectors are now evaluated natively (not translated to XPath), you'll want to use something like :first-child, or whatever is appropriate.

[mariovisic]

@mhoran thanks for the explanation :)

[tmorris-fiksu]

Make sure to see the discussion here: teamcapybara/capybara@4f805d5
for a work-around to make your transition to 2.1 easier if you have this problem.

[ziemekwolski]

Thank you so much for posting this!