Add skeleton for Rails::SystemTestCase

This skelton is the bare minimum to get system tests to actually run in
an application. This of course doesn't yet actually run a test but it is
enough for `bin/rails test:system` to attempt to run files in
`test/system` that inherit from `Rails::SystemTestCase`.

2 files changed, 13 insertions, 0 deletions

diff --git a/actionpack/lib/system_test_case.rb b/actionpack/lib/system_test_case.rb
new file mode 100644
index 0000000000..fdaae3ff40
--- /dev/null
+++ b/actionpack/lib/system_test_case.rb
@@ -0,0 +1,5 @@
+module Rails
+  class SystemTestCase < ActiveSupport::TestCase
+    include Rails.application.routes.url_helpers
+  end
+end
diff --git a/railties/lib/rails/test_help.rb b/railties/lib/rails/test_help.rb
index 0f9bf98737..468b50c0f8 100644
--- a/railties/lib/rails/test_help.rb
+++ b/railties/lib/rails/test_help.rb
@@ -7,6 +7,7 @@ require "active_support/test_case"
 require "action_controller"
 require "action_controller/test_case"
 require "action_dispatch/testing/integration"
+require 'system_test_case'
 require "rails/generators/test_case"
 
 require "active_support/testing/autorun"
@@ -44,3 +45,10 @@ class ActionDispatch::IntegrationTest
     super
   end
 end
+
+class Rails::SystemTestCase
+  def before_setup # :nodoc:
+    @routes = Rails.application.routes
+    super
+  end
+end