```ruby
require 'action_view'

class DummyView < ActionView::Base
  module FakeRequest
    class Request
      attr_accessor :path, :fullpath, :protocol, :host_with_port
      def get?
        true
      end
    end
    def request
      @request ||= Request.new
    end
    def params
      @params ||= {}
    end
  end

  include FakeRequest
  include ActionView::Helpers::UrlHelper
  include Loaf::ViewExtensions

  def initialize(*args)
    context = ActionView::LookupContext.new([])
    super(context, *args)
  end

  attr_reader :_breadcrumbs

  routes = ActionDispatch::Routing::RouteSet.new
  routes.draw do
    get "/" => "foo#bar", :as => :home
    get "/posts" => "foo#posts"
    get "/posts/:title" => "foo#posts"
    get "/post/:id" => "foo#post", :as => :post
    get "/post/:title" => "foo#title"
    get "/post/:id/comments" => "foo#comments"

    namespace :blog do
      get "/" => "foo#bar"
    end
  end

  include routes.url_helpers

  def set_path(path)
    request.path = path
    request.fullpath = path
    request.protocol = 'http://'
    request.host_with_port = 'www.example.com'
  end
end
```

Update DummyView to pass in required arguments as required by Rails 6.1
user
```ruby
require "action_view"

class DummyView < ActionView::Base
  module FakeRequest
    class Request
      attr_accessor :path, :fullpath, :protocol, :host_with_port
      def get?
        true
      end
    end
    def request
      @request ||= Request.new
    end
    def params
      @params ||= {}
    end
  end

  include FakeRequest
  include ActionView::Helpers::UrlHelper
  include Loaf::ViewExtensions

  def initialize
    context = ActionView::LookupContext.new([])
    assigns = {}
    controller = nil
    super(context, assigns, controller)
  end

  attr_reader :_breadcrumbs

  routes = ActionDispatch::Routing::RouteSet.new
  routes.draw do
    get "/" => "foo#bar", :as => :home
    get "/posts" => "foo#posts"
    get "/posts/:title" => "foo#posts"
    get "/post/:id" => "foo#post", :as => :post
    get "/post/:title" => "foo#title"
    get "/post/:id/comments" => "foo#comments"

    namespace :blog do
      get "/" => "foo#bar"
    end
  end

  include routes.url_helpers

  def set_path(path)
    request.path = path
    request.fullpath = path
    request.protocol = "http://"
    request.host_with_port = "www.example.com"
  end
end
```
assistant