3 files changed, 58 insertions, 0 deletions
diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index 1fcab8c651..89337b7f66 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -53,5 +53,26 @@ module ApplicationTests
         assert_raises(NoMethodError) { 1.day }
       end
     end
+
+    test "marking the application as threadsafe sets the correct config variables" do
+      add_to_config <<-RUBY
+        config.threadsafe!
+      RUBY
+
+      require "#{app_path}/config/application"
+      assert AppTemplate.configuration.action_controller.allow_concurrency
+    end
+
+    test "the application can be marked as threadsafe when there are no frameworks" do
+      FileUtils.rm_rf("#{app_path}/config/environments")
+      add_to_config <<-RUBY
+        config.frameworks = []
+        config.threadsafe!
+      RUBY
+
+      assert_nothing_raised do
+        require "#{app_path}/config/application"
+      end
+    end
   end
 end
diff --git a/railties/test/application/initializer_test.rb b/railties/test/application/initializer_test.rb
index 56582c5772..fa00d287ca 100644
--- a/railties/test/application/initializer_test.rb
+++ b/railties/test/application/initializer_test.rb
@@ -6,6 +6,7 @@ module ApplicationTests
 
     def setup
       build_app
+      FileUtils.rm_rf("#{app_path}/config/environments")
       boot_rails
       require "rails"
     end
diff --git a/railties/test/plugins/configuration_test.rb b/railties/test/plugins/configuration_test.rb
new file mode 100644
index 0000000000..edf8bb37f5
--- /dev/null
+++ b/railties/test/plugins/configuration_test.rb
@@ -0,0 +1,36 @@
+require "isolation/abstract_unit"
+
+module PluginsTest
+  class ConfigurationTest < Test::Unit::TestCase
+    def setup
+      build_app
+      boot_rails
+      require "rails"
+    end
+
+    test "config is available to plugins" do
+      class Foo < Rails::Plugin ; end
+      assert_nil Foo.config.action_controller.foo
+    end
+
+    test "a config name is available for the plugin" do
+      class Foo < Rails::Plugin ; config.foo.greetings = "hello" ; end
+      assert_equal "hello", Foo.config.foo.greetings
+    end
+
+    test "plugin configurations are available in the application" do
+      class Foo < Rails::Plugin ; config.foo.greetings = "hello" ; end
+      require "#{app_path}/config/application"
+      assert_equal "hello", AppTemplate.config.foo.greetings
+    end
+
+    test "plugin config merges are deep" do
+      class Foo < Rails::Plugin ; config.foo.greetings = 'hello' ; end
+      class MyApp < Rails::Application
+        config.foo.bar = "bar"
+      end
+      assert_equal "hello", MyApp.config.foo.greetings
+      assert_equal "bar",   MyApp.config.foo.bar
+    end
+  end
+end
+\ No newline at end of file