Q:

Resize Chrome's window while using Capybara

I use Capybara (with selenium) and Chrome, and RSpec. But i would like to change width of browser in some tests. What is the solution in this case?
spec/spec_helper.rb
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'rspec/autorun'
require 'capybara/rspec'

# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

# Using chrome as browser to test in capybara.
Capybara.register_driver :selenium do |app|
  Capybara::Selenium::Driver.new(app, :browser => :chrome)
end

# RSpec config.
RSpec.configure do |config|
  config.include Devise::TestHelpers, :type => :controller    
  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  config.fixture_path = "#{::Rails.root}/spec/fixtures"

  # If you're not using ActiveRecord, or you'd prefer not to run each of your
  # examples within a transaction, remove the following line or assign false
  # instead of true.
  config.use_transactional_fixtures = false

  # If true, the base class of anonymous controllers will be inferred
  # automatically. This will be the default behavior in future versions of
  # rspec-rails.
  config.infer_base_class_for_anonymous_controllers = false

  # Clean test database.
  config.before(:suite) do
    DatabaseCleaner.strategy = :truncation
  end

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

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

A:

There is resize_to function in Selenium Webdriver that you can use:
page.driver.browser.manage.window.resize_to(1024, 768)

Window has some other methods that may be useful.

A:

I've found that the Driver#browser call is now deprecated (Capybara 2.5.0).
You can use the Driver#resize_window_to call to resize the window:
page.driver.resize_window_to(page.driver.current_window_handle, 1_200, 800)

You can also use Session#current_window then Window#resize_to:
page.current_window.resize_to(1_200, 800)
Look at the docs for more info:
http://www.rubydoc.info/github/jnicklas/capybara/Capybara

