Reconfigure how the drivers work

This removes the useless Rack Test Driver that Rails was providing and
moves to a shim like approach for default adapters.

If someone wants to use one of the default Capybara Drivers then we will
initialize a new `CapybaraDriver` that simply sets the default driver.

Rails though is much more opinionated than Capybara and to make system
testing a "works out of the box" framework in Rails we have the
`RailsSeleniumDriver`. This driver sets defaults that Rails deems
important for selenium testing. The purpose of this is to simply add a
test and it just works.

1 files changed, 6 insertions, 12 deletions

diff --git a/actionpack/lib/system_testing/driver_adapter.rb b/actionpack/lib/system_testing/driver_adapter.rb
index cf44a4fd6b..3d8545f3c6 100644
--- a/actionpack/lib/system_testing/driver_adapter.rb
+++ b/actionpack/lib/system_testing/driver_adapter.rb
@@ -4,32 +4,26 @@ module SystemTesting
   # The <tt>SystemTesting::DriverAdapter</tt> module is used to load the driver
   # set in your Rails' test configuration file.
   #
-  # The default driver adapters is the +:capybara_rack_test_driver+.
+  # The default driver adapter is the +:rails_selenium_driver+.
   module DriverAdapter
     extend ActiveSupport::Concern
 
     module ClassMethods
       def default_driver # :nodoc
-        :capybara_rack_test_driver
+        :rails_selenium_driver
       end
 
       # Returns the current driver that is set. If no driver is set in the
-      # Rails' configuration file then +:capybara_rack_test_driver+ will be
+      # Rails' configuration file then +:rails_selenium_driver+ will be
       # initialized.
       def driver
-        @driver ||= DriverAdapters.lookup(default_driver).new
+        @driver ||= DriverAdapters.lookup(default_driver)
       end
 
       # Specify the adapter and settings for the system test driver set in the
       # Rails' configuration file.
-      def driver=(adapter)
-        @driver = case adapter
-        when Symbol
-          DriverAdapters.lookup(adapter).new
-        else
-          adapter
-        end
-
+      def driver=(driver)
+        @driver = DriverAdapters.lookup(driver)
         @driver.call
       end
     end