Module: Capybara::Screenshot::Diff

Includes:
DSL, Os
Defined in:
lib/capybara/screenshot/diff.rb,
lib/capybara/screenshot/diff/vcs.rb,
lib/capybara/screenshot/diff/version.rb,
lib/capybara/screenshot/diff/test_methods.rb,
lib/capybara/screenshot/diff/drivers/utils.rb,
lib/capybara/screenshot/diff/image_compare.rb,
lib/capybara/screenshot/diff/stabilization.rb,
lib/capybara/screenshot/diff/drivers/vips_driver.rb,
lib/capybara/screenshot/diff/drivers/chunky_png_driver.rb

Overview

Module to track screen shot changes

Defined Under Namespace

Modules: Drivers, Stabilization, TestMethods, Utils, Vcs Classes: ImageCompare

Constant Summary collapse

AVAILABLE_DRIVERS = 
Utils.detect_available_drivers.freeze
VERSION = 
"1.6.2"
LOADED_DRIVERS = 
{}

Constants included from Os

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

Class Method Summary collapse

Methods included from Os

#os_name

Class Method Details

.default_options ⇒ Object 



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# File 'lib/capybara/screenshot/diff.rb', line 65

def self.default_options
  {
    area_size_limit: area_size_limit,
    color_distance_limit: color_distance_limit,
    driver: driver,
    shift_distance_limit: shift_distance_limit,
    skip_area: skip_area,
    stability_time_limit: Screenshot.stability_time_limit,
    tolerance: tolerance,
    wait: Capybara.default_max_wait_time
  }
end

.included(klass) ⇒ Object 



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# File 'lib/capybara/screenshot/diff.rb', line 78

def self.included(klass)
  klass.include TestMethods
  klass.setup do
    if Capybara::Screenshot.window_size
      if page.driver.respond_to?(:resize)
        page.driver.resize(*Capybara::Screenshot.window_size)
      elsif selenium?
        page.driver.browser.manage.window.resize_to(*Capybara::Screenshot.window_size)
      end
    end
  end

  klass.teardown do
    if Capybara::Screenshot.active? && @test_screenshots
      test_screenshot_errors = @test_screenshots
        .map { |caller, name, compare| assert_image_not_changed(caller, name, compare) }
      @test_screenshots = nil # release the comparison objects from memory
      test_screenshot_errors.compact!
      if test_screenshot_errors.any?
        e = ASSERTION.new(test_screenshot_errors.join("\n\n"))
        e.set_backtrace(caller)
        if defined?(failures)
          failures << e
        else
          raise e
        end
      end
    end
  end
end