require 'abstract_unit' module MiddlewareTest class MyMiddleware def initialize(app) @app = app end def call(env) result = @app.call(env) result[1]["Middleware-Test"] = "Success" result[1]["Middleware-Order"] = "First" result end end class ExclaimerMiddleware def initialize(app) @app = app end def call(env) result = @app.call(env) result[1]["Middleware-Order"] << "!" result end end class BlockMiddleware attr_accessor :configurable_message def initialize(app, &block) @app = app yield(self) if block_given? end def call(env) result = @app.call(env) result[1]["Configurable-Message"] = configurable_message result end end class MyController < ActionController::Metal use BlockMiddleware do |config| config.configurable_message = "Configured by block." end use MyMiddleware middleware.insert_before MyMiddleware, ExclaimerMiddleware def index self.response_body = "Hello World" end end class InheritedController < MyController end class ActionsController < ActionController::Metal use MyMiddleware, :only => :show middleware.insert_before MyMiddleware, ExclaimerMiddleware, :except => :index def index self.response_body = "index" end def show self.response_body = "show" end end class TestMiddleware < ActiveSupport::TestCase def setup @app = MyController.action(:index) end test "middleware that is 'use'd is called as part of the Rack application" do result = @app.call(env_for("/")) assert_equal ["Hello World"], result[2] assert_equal "Success", result[1]["Middleware-Test"] end test "the middleware stack is exposed as 'middleware' in the controller" do result = @app.call(env_for("/")) assert_equal "First!", result[1]["Middleware-Order"] end test "middleware stack accepts block arguments" do result = @app.call(env_for("/")) assert_equal "Configured by block.", result[1]["Configurable-Message"] end test "middleware stack accepts only and except as options" do result = ActionsController.action(:show).call(env_for("/")) assert_equal "First!", result[1]["Middleware-Order"] result = ActionsController.action(:index).call(env_for("/")) assert_nil result[1]["Middleware-Order"] end def env_for(url) Rack::MockRequest.env_for(url) end end class TestInheritedMiddleware < TestMiddleware def setup @app = InheritedController.action(:index) end end end