Module: Capybara::Screenshot::Diff::Stabilization

Includes:
Os
Included in:
TestMethods
Defined in:
lib/capybara/screenshot/diff/stabilization.rb

Constant Summary collapse

IMAGE_WAIT_SCRIPT = 
<<-JS.strip_heredoc.freeze
  function pending_image() {
    var images = document.images;
    for (var i = 0; i < images.length; i++) {
      if (!images[i].complete) {
          return images[i].src;
      }
    }
    return false;
  }()
JS

Constants included from Os

Os::ON_LINUX, Os::ON_MAC, Os::ON_WINDOWS

Instance Method Summary collapse

Methods included from Os

#os_name

Instance Method Details

#take_stable_screenshot(comparison, color_distance_limit:, shift_distance_limit:, area_size_limit:, skip_area:) ⇒ Object 



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# File 'lib/capybara/screenshot/diff/stabilization.rb', line 23

def take_stable_screenshot(comparison, color_distance_limit:, shift_distance_limit:,
    area_size_limit:, skip_area:)
  blurred_input = prepare_page_for_screenshot
  previous_file_name = comparison.old_file_name
  screenshot_started_at = last_image_change_at = Time.now
  loop.with_index do |_x, i|
    take_right_size_screenshot(comparison)

    break unless Capybara::Screenshot.stability_time_limit

    if comparison.quick_equal?
      clean_stabilization_images(comparison.new_file_name)
      break
    end
    comparison.reset

    if previous_file_name
      stabilization_comparison =
        ImageCompare.new(comparison.new_file_name, previous_file_name,
            color_distance_limit: color_distance_limit, shift_distance_limit: shift_distance_limit,
            area_size_limit: area_size_limit, skip_area: skip_area)
      if stabilization_comparison.quick_equal?
        if (Time.now - last_image_change_at) > Capybara::Screenshot.stability_time_limit
          clean_stabilization_images(comparison.new_file_name)
          break
        end
        next
      else
        last_image_change_at = Time.now
      end

      check_max_wait_time(comparison, screenshot_started_at,
          shift_distance_limit: shift_distance_limit)
    end

    previous_file_name = "#{comparison.new_file_name.chomp('.png')}_x#{format('%02i', i)}.png~"

    FileUtils.mv comparison.new_file_name, previous_file_name
  end
ensure
  blurred_input&.click
end