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# frozen_string_literal: true
require "abstract_unit"
module MiddlewareTest
class MyMiddleware
def initialize(app, kw: nil)
@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, kw: nil)
@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, kw: 1
middleware.insert_before MyMiddleware, ExclaimerMiddleware, kw: 1
def index
self.response_body = "Hello World"
end
end
class InheritedController < MyController
end
class ActionsController < ActionController::Metal
use MyMiddleware, only: :show, kw: 1
middleware.insert_before MyMiddleware, ExclaimerMiddleware, except: :index, kw: 1
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"], [].tap { |a| result[2].each { |x| a << x } }
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
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