Move and rename system tests

* Move system tests back into Action Pack
* Rename `ActionSystemTest` to `ActionDispatch::SystemTestCase`
* Remove private base module and only make file for public
`SystemTestCase` class, name private module `SystemTesting`
* Rename `ActionSystemTestCase` to `ApplicationSystemTestCase`
* Update corresponding documentation and guides
* Delete old `ActionSystemTest` files

1 files changed, 28 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/system_testing/browser.rb b/actionpack/lib/action_dispatch/system_testing/browser.rb
new file mode 100644
index 0000000000..c9a6628516
--- /dev/null
+++ b/actionpack/lib/action_dispatch/system_testing/browser.rb
@@ -0,0 +1,28 @@
+module ActionDispatch
+  module SystemTesting
+    class Browser # :nodoc:
+      def initialize(name, screen_size)
+        @name = name
+        @screen_size = screen_size
+      end
+
+      def run
+        register
+        setup
+      end
+
+      private
+        def register
+          Capybara.register_driver @name do |app|
+            Capybara::Selenium::Driver.new(app, browser: @name).tap do |driver|
+              driver.browser.manage.window.size = Selenium::WebDriver::Dimension.new(*@screen_size)
+            end
+          end
+        end
+
+        def setup
+          Capybara.default_driver = @name.to_sym
+        end
+    end
+  end
+end