Poltergeist Change Window Size
The default window size for poltergeist is 1024 x 768, in some cases you may want to change it to fit your specs.
Change Window Size Per Spec
page.driver.resize_window 1200, 768
Then you can check it this way.
page.driver.browser.client.window_size # => [1200, 768]
Note that this will not change the default window size for other specs, so no need to resize it back.
Change Window Size Globally
If you’re using RSpec, you may want to create a metadata tag for it.
RSpec.configure do |config|
config.before(:example, :mobile, type: :feature) do
page.driver.add_headers("User-Agent" => "iPhone")
page.driver.resize_window 320, 568
end
end
Here we registered a :mobile metadata tag to change the window size to 320, 568, also set the user agent to further simulate the request from a mobile.
scenario "Do something in mobile", :js, :mobile do
page.driver.browser.client.window_size # => [320, 568]
end
Change Default Window Size
You could also customize the window size when register the poltergeist drive.
# spec/support/capybara.rb
require 'capybara/poltergeist'
Capybara.register_driver :poltergeist do |app|
Capybara::Poltergeist::Driver.new(app, window_size: [1600, 768])
end
Capybara.javascript_driver = :poltergeist
