Middleware configuration tests

railties/test/application/middleware_test.rb

@@ -0,0 +1,67 @@
+require 'isolation/abstract_unit'
+
+module ApplicationTests
+  class MiddlewareTest < Test::Unit::TestCase
+    include ActiveSupport::Testing::Isolation
+
+    def setup
+      build_app
+      boot_rails
+      FileUtils.rm_rf "#{app_path}/config/environments"
+    end
+
+    test "default middleware stack" do
+      boot!
+
+      assert_equal [
+        "ActionDispatch::Static",
+        "Rack::Lock",
+        "Rack::Runtime",
+        "ActionDispatch::ShowExceptions",
+        "ActionDispatch::Callbacks",
+        "ActionDispatch::Session::CookieStore",
+        "ActionDispatch::ParamsParser",
+        "Rack::MethodOverride",
+        "Rack::Head",
+        "ActionDispatch::StringCoercion",
+        "ActiveRecord::ConnectionAdapters::ConnectionManagement",
+        "ActiveRecord::QueryCache"
+      ], middleware
+    end
+
+    test "removing activerecord omits its middleware" do
+      use_frameworks []
+      boot!
+      assert !middleware.include?("ActiveRecord::ConnectionAdapters::ConnectionManagement")
+      assert !middleware.include?("ActiveRecord::QueryCache")
+    end
+
+    test "removes lock if allow concurrency is set" do
+      add_to_config "config.action_controller.allow_concurrency = true"
+      boot!
+      assert !middleware.include?("Rack::Lock")
+    end
+
+    test "removes static asset server if serve_static_assets is disabled" do
+      add_to_config "config.serve_static_assets = false"
+      boot!
+      assert !middleware.include?("ActionDispatch::Static")
+    end
+
+    test "use middleware" do
+      use_frameworks []
+      add_to_config "config.middleware.use Rack::Config"
+      boot!
+      assert_equal "Rack::Config", middleware.last
+    end
+
+    private
+      def boot!
+        require "#{app_path}/config/environment"
+      end
+
+      def middleware
+        AppTemplate::Application.instance.middleware.active.map(&:klass).map(&:name)
+      end
+  end
+end