Fix app and actions generators tests

Normally Rails.application is an instance, but for those
tests Rails.application needs to be class.
Signed-off-by: NJosé Valim <jose.valim@gmail.com>

railties/test/generators/actions_test.rb

@@ -7,11 +7,16 @@ class ActionsTest < Rails::Generators::TestCase
   arguments [destination_root]
 
   def setup
+    Rails.application = TestApp::Application
     super
     @git_plugin_uri = 'git://github.com/technoweenie/restful-authentication.git'
     @svn_plugin_uri = 'svn://svnhub.com/technoweenie/restful-authentication/trunk'
   end
 
+  def teardown
+    Rails.application = TestApp::Application.instance
+  end
+
   def test_invoke_other_generator_with_shortcut
     action :invoke, 'model', ['my_model']
     assert_file 'app/models/my_model.rb', /MyModel/

railties/test/generators/app_generator_test.rb

@@ -42,6 +42,7 @@ class AppGeneratorTest < Rails::Generators::TestCase
   arguments [destination_root]
 
   def setup
+    Rails.application = TestApp::Application
     super
     Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
     @bundle_command = File.basename(Thor::Util.ruby_command).sub(/ruby/, 'bundle')
@@ -56,6 +57,7 @@ def setup
   def teardown
     super
     Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
+    Rails.application = TestApp::Application.instance
   end
 
   def test_application_skeleton_is_created
@@ -268,6 +270,7 @@ class CustomAppGeneratorTest < Rails::Generators::TestCase
   arguments [destination_root]
 
   def setup
+    Rails.application = TestApp::Application
     super
     Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
     @bundle_command = File.basename(Thor::Util.ruby_command).sub(/ruby/, 'bundle')
@@ -277,6 +280,7 @@ def teardown
     super
     Rails::Generators::AppGenerator.instance_variable_set('@desc', nil)
     Object.class_eval { remove_const :AppBuilder if const_defined?(:AppBuilder) }
+    Rails.application = TestApp::Application.instance
   end
 
   def test_builder_option_with_empty_app_builder