Capybara with :js => true causes test to fail

Question

I\'m new to Capybara and testing on Rails in general, so please forgive me if this is a simple answer.

I\'ve got this test

it \"should be able to edi         


        

Answer 1

A variation of brutuscat's answer that fixed our feature specs (which all use Capybara):

config.before(:suite) do
  DatabaseCleaner.clean_with(:truncation)
end

config.before(:each) do
  # set the default
  DatabaseCleaner.strategy = :transaction
end

config.before(:each, type: :feature) do
  DatabaseCleaner.strategy = :truncation
end

config.before(:each) do
  DatabaseCleaner.start
end

config.append_after(:each) do
  DatabaseCleaner.clean
end

Answer 2

I've read the Capybara readme at https://github.com/jnicklas/capybara and it solved my issue.

Transactional fixtures only work in the default Rack::Test driver, but not for other drivers like Selenium. Cucumber takes care of this automatically, but with Test::Unit or RSpec, you may have to use the database_cleaner gem. See this explanation (and code for solution 2 and solution 3) for details.

But basically its a threading issue that involves Capybara having its own thread when running the non-Rack driver, that makes the transactional fixtures feature to use a second connection in another context. So the driver thread is never in the same context of the running rspec.

Luckily this can be easily solve (at least it solved for me) doing a dynamic switching in th DatabaseCleaner strategy to use:

RSpec.configure do |config|
  config.use_transactional_fixtures = false

  config.before :each do
    if Capybara.current_driver == :rack_test
      DatabaseCleaner.strategy = :transaction
    else
      DatabaseCleaner.strategy = :truncation
    end
    DatabaseCleaner.start
  end

  config.after do
    DatabaseCleaner.clean
  end
end

Answer 3

There is another way to deal with this problem now described and discussed here: Why not use shared ActiveRecord connections for Rspec + Selenium?