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, 1 insertions, 7 deletions

diff --git a/actionpack/test/system_testing/driver_adapter_test.rb b/actionpack/test/system_testing/driver_adapter_test.rb
index bfbeaa63a2..220a755bd3 100644
--- a/actionpack/test/system_testing/driver_adapter_test.rb
+++ b/actionpack/test/system_testing/driver_adapter_test.rb
@@ -7,13 +7,7 @@ class DriverAdapterTest < ActiveSupport::TestCase
     end
 
     assert_nothing_raised do
-      Rails::SystemTestCase.driver = :capybara_selenium_driver
-    end
-  end
-
-  test 'settings can only be used for the appropriate adapter' do
-    assert_raises(ArgumentError) do
-      Rails::SystemTestCase.driver = SystemTesting::DriverAdapters::CapybaraRackTestDriver.new(something: 'test')
+      Rails::SystemTestCase.driver = :rack_test
     end
   end
 end