How can I setup capybara with rails 4 - ruby-on-rails

Question

I have capybara and when I run my Featured tests raised an error, it says about pending migrations in test environment, but when a run other type of test everything is good. I've already run all my migrations in test environment, I've already run rails in test and development envs.
this is my gemfile
group :development, :test do
.... other gems ....
gem 'rspec-rails'
gem 'factory_girl_rails'
gem 'database_cleaner'
gem 'capybara', '~> 2.5.0'
gem 'capybara-webkit', '~> 1.7.1'
gem 'selenium-webdriver'
gem 'poltergeist'
gem 'launchy-rails', '~> 0.0.1'
end
this is my test
# spec/features/sign_in_spec.rb
require 'rails_helper'
feature 'Visitor signs up' do
it "signs me in", :type => :feature do
visit new_user_session_path
puts "page: #{page.html.inspect}"
save_and_open_page
end
end
Thanks!
UPDATE:
I just try with this command:
bin/rake db:drop db:create db:migrate RAILS_ENV=test
Everything is ok with that command. Then I run my server with:
rails s -e test
Same error in my browser, "ActiveRecord::PendingMigrationError"
http://localhost:3000/
Then I run migrate command
bin/rake db:migrate RAILS_ENV=test
But it raised an error "ActiveRecord::StatementInvalid: PG::DuplicateTable: ERROR: relation "users" already exists"
And same error when a I run the features tests.
Here are my helpers: https://gist.github.com/israelb/e2f4b10ba5f94e1e8df2

Answer 1

There may be some kind of migration issue. Try rake db:test:prepare see if that helps.

Answer 2

I found the solution, I was a problem in my config/enviroment/test.rb file, I had to change by this one:
Rails.application.configure do
# Settings specified here will take precedence over those in config/application.rb.
# The test environment is used exclusively to run your application's
# test suite. You never need to work with it otherwise. Remember that
# your test database is "scratch space" for the test suite and is wiped
# and recreated between test runs. Don't rely on the data there!
config.cache_classes = true
# Do not eager load code on boot. This avoids loading your whole application
# just for the purpose of running a single test. If you are using a tool that
# preloads Rails for running tests, you may have to set it to true.
config.eager_load = false
# Configure static file server for tests with Cache-Control for performance.
config.serve_static_files = true
config.static_cache_control = 'public, max-age=3600'
# Show full error reports and disable caching.
config.consider_all_requests_local = true
config.action_controller.perform_caching = false
# Raise exceptions instead of rendering exception templates.
config.action_dispatch.show_exceptions = false
# Disable request forgery protection in test environment.
config.action_controller.allow_forgery_protection = false
# Tell Action Mailer not to deliver emails to the real world.
# The :test delivery method accumulates sent emails in the
# ActionMailer::Base.deliveries array.
config.action_mailer.delivery_method = :test
# Randomize the order test cases are executed.
config.active_support.test_order = :random
# Print deprecation notices to the stderr.
config.active_support.deprecation = :stderr
# Raises error for missing translations
# config.action_view.raise_on_missing_translations = true
end