Cannot use URL/path helpers in decorators at controller tests from ver. 1.5.0

[scivola]

If we use URL/path helpers in a decorator, we had to add the following lines to test/test_helper.rb.

require "active_decorator/view_context"
ActiveDecorator::ViewContext.push Rails.application.routes.url_helpers

However NoMethodError occurs from active_decorator 1.5.0, even if we do so.

reproduction code

At first, we write the following Bash script.

# !/bin/bash

rails _$1_ new $2
cd $2

bundle add active_decorator -v "$3"
rails g scaffold item name
rails db:migrate
rails g decorator item

git add .
git commit -m initial

ruby -0pi -e '$_.sub!(/(?=end)/, "  def path = item_path(self)\n")' app/decorators/item_decorator.rb

ruby -0pi -e '$_.sub!(/\z/, %(\nrequire "active_decorator/view_context"\nActiveDecorator::ViewContext.push Rails.application.routes.url_helpers))' test/test_helper.rb

ruby -0pi -e '$_.sub!(/(?=end\n\z)/, %(\n  test("path_helper") { assert_nothing_raised{ ActiveDecorator::Decorator.instance.decorate(items(:one)).path } }\n))' test/controllers/items_controller_test.rb

rails test -n path_helper test/controllers/items_controller_test.rb

Then run it as follows:

$ ./test.sh 7.2.2.2 test1 1.4.1

-> No problem. The test is successfull.

$ ./test.sh 7.2.2.2 test2 1.5.0

-> The following exception occurs:

Error:
ItemsControllerTest#test_path_helper:
NoMethodError: undefined method 'item_path' for #<Item:0x000000012c291238>
    app/decorators/item_decorator.rb:4:in 'ItemDecorator#path'
    test/controllers/items_controller_test.rb:49:in 'block (2 levels) in <class:ItemsControllerTest>'
    test/controllers/items_controller_test.rb:49:in 'block in <class:ItemsControllerTest>'

$ ./test.sh 7.2.2.2 test2 1.5.1

-> Same as ver. 1.5.0.