Add configurable selenium driver for capybara

This is not yet configurable but is the minimum required to make
Capybara work with the Selenium driver. A lot of this will change as the
tests get fleshed out and the initialization requirements will eventually
be configurable via the application.

2 files changed, 80 insertions, 0 deletions

diff --git a/actionpack/lib/system_testing/driver_adapters.rb b/actionpack/lib/system_testing/driver_adapters.rb
index 38e2bdddcc..a8933b4496 100644
--- a/actionpack/lib/system_testing/driver_adapters.rb
+++ b/actionpack/lib/system_testing/driver_adapters.rb
@@ -3,6 +3,7 @@ module SystemTesting
     extend ActiveSupport::Autoload
 
     autoload :CapybaraRackTestDriver
+    autoload :CapybaraSeleniumDriver
 
     class << self
       def lookup(name)
diff --git a/actionpack/lib/system_testing/driver_adapters/capybara_selenium_driver.rb b/actionpack/lib/system_testing/driver_adapters/capybara_selenium_driver.rb
new file mode 100644
index 0000000000..b4cb10da4f
--- /dev/null
+++ b/actionpack/lib/system_testing/driver_adapters/capybara_selenium_driver.rb
@@ -0,0 +1,79 @@
+require 'rack/handler/puma'
+require 'selenium-webdriver'
+
+module SystemTesting
+  module DriverAdapters
+    class CapybaraSeleniumDriver
+      attr_reader :browser, :server, :port, :screen_size
+
+      def initialize(browser: :chrome, server: :puma, port: 28100, screen_size: [1400,1400])
+        @browser     = browser
+        @server      = server
+        @port        = port
+        @screen_size = screen_size
+      end
+
+      def call
+        registration
+        setup
+      end
+
+      private
+        def registration
+          register_browser_driver
+          register_server
+        end
+
+        def setup
+          set_server
+          set_driver
+          set_port
+        end
+
+        def register_browser_driver
+          Capybara.register_driver @browser do |app|
+            Capybara::Selenium::Driver.new(app, browser: @browser).tap do |driver|
+              driver.browser.manage.window.size = Selenium::WebDriver::Dimension.new(*@screen_size)
+            end
+          end
+        end
+
+        def register_server
+          Capybara.register_server @server do |app, port, host|
+            case @server
+            when :puma
+              register_puma(app, port)
+            when :webrick
+              register_webrick(app, port, host)
+            else
+              register_default(app, port)
+            end
+          end
+        end
+
+        def register_default(app, port)
+          Capybara.run_default_server(app, port)
+        end
+
+        def register_puma(app, port)
+          ::Rack::Handler::Puma.run(app, Port: port, Threads: '0:4')
+        end
+
+        def register_webrick(app, port, host)
+          Rack::Handler::WEBrick.run(app, Host: host, Port: port, AccessLog: [], Logger: WEBrick::Log::new(nil, 0))
+        end
+
+        def set_server
+          Capybara.server = @server
+        end
+
+        def set_driver
+          Capybara.default_driver = @browser.to_sym
+        end
+
+        def set_port
+          Capybara.server_port = @port
+        end
+    end
+  end
+end