1 files changed, 62 insertions, 4 deletions
diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index 9f62ca8eb8..482da98a45 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -238,6 +238,66 @@ module ApplicationTests
       assert_instance_of Pathname, Rails.public_path
     end
 
+    test "does not eager load controller actions in development" do
+      app_file "app/controllers/posts_controller.rb", <<-RUBY
+        class PostsController < ActionController::Base
+          def index;end
+          def show;end
+        end
+      RUBY
+
+      app "development"
+
+      assert_nil PostsController.instance_variable_get(:@action_methods)
+    end
+
+    test "eager loads controller actions in production" do
+      app_file "app/controllers/posts_controller.rb", <<-RUBY
+        class PostsController < ActionController::Base
+          def index;end
+          def show;end
+        end
+      RUBY
+
+      add_to_config <<-RUBY
+        config.eager_load = true
+        config.cache_classes = true
+      RUBY
+
+      app "production"
+
+      assert_equal %w(index show).to_set, PostsController.instance_variable_get(:@action_methods)
+    end
+
+    test "does not eager load mailer actions in development" do
+      app_file "app/mailers/posts_mailer.rb", <<-RUBY
+        class PostsMailer < ActionMailer::Base
+          def noop_email;end
+        end
+      RUBY
+
+      app "development"
+
+      assert_nil PostsMailer.instance_variable_get(:@action_methods)
+    end
+
+    test "eager loads mailer actions in production" do
+      app_file "app/mailers/posts_mailer.rb", <<-RUBY
+        class PostsMailer < ActionMailer::Base
+          def noop_email;end
+        end
+      RUBY
+
+      add_to_config <<-RUBY
+        config.eager_load = true
+        config.cache_classes = true
+      RUBY
+
+      app "production"
+
+      assert_equal %w(noop_email).to_set, PostsMailer.instance_variable_get(:@action_methods)
+    end
+
     test "initialize an eager loaded, cache classes app" do
       add_to_config <<-RUBY
         config.eager_load = true
@@ -453,10 +513,8 @@ module ApplicationTests
           secret_key_base: 123
       YAML
 
-      app "development"
-
       assert_raise(ArgumentError) do
-        app.key_generator
+        app "development"
       end
     end
 
@@ -1452,8 +1510,8 @@ module ApplicationTests
 
     test "raises with proper error message if no database configuration found" do
       FileUtils.rm("#{app_path}/config/database.yml")
-      app "development"
       err = assert_raises RuntimeError do
+        app "development"
         Rails.application.config.database_configuration
       end
       assert_match "config/database", err.message