如何在Rails控制台中重现Rails单元测试（有关路线的错误）

Question

我是一位经验丰富的程序员，但是是Ruby和Rails的新手。 我想尝试为现有项目构建新测试，所以我认为一个好的开始方法是在Rails控制台中逐行复制现有测试。 但是，我无法使其工作。

正如这个问题所暗示的那样，我转到了项目的主目录并执行了以下操作：

$ rails console -e test
Loading test environment (Rails 5.2.0)
irb(main):001:0> require './test/test_helper'
[Coveralls] Set up the SimpleCov formatter.
[Coveralls] Using SimpleCov's 'rails' settings.
   (1.0ms)  SELECT "schema_migrations"."version" FROM "schema_migrations" ORDER BY "schema_migrations"."version" ASC
=> true

到现在为止还挺好。 但是我仍然无法加载实际的测试模块：

irb(main):002:0> require './test/controllers/users_controller_test'
Traceback (most recent call last):
        2: from (irb):2
        1: from test/controllers/users_controller_test.rb:1:in `<top (required)>'
LoadError (cannot load such file -- test_helper)

因此，我尝试按如下所示调整$ LOAD_PATH，这似乎可行：

irb(main):003:0> $LOAD_PATH.unshift '/{{absolute path to project}}/test'
{{irb now prints the new $LOAD_PATH which is really long}}
irb(main):004:0> require './test/controllers/users_controller_test'                         
=> true

但是，当我尝试运行实际测试时，它仍然无法正常工作。 看起来像是某种卸载的“路线”：

irb(main):008:0> my_test = UsersControllerTest.new("My Test")
=> #<UsersControllerTest:0x000055c90aadd148 @NAME="My Test", @failures=[], @assertions=0>
irb(main):009:0> my_test.test_routes
Traceback (most recent call last):
        2: from (irb):9
        1: from test/controllers/users_controller_test.rb:11:in `test_routes'
NoMethodError (undefined method `recognize_path' for nil:NilClass)
irb(main):010:0> my_test.test_new_view
Traceback (most recent call last):
        2: from (irb):10
        1: from test/controllers/users_controller_test.rb:191:in `test_new_view'
RuntimeError (@routes is nil: make sure you set it in your test's setup method.)

有没有更简单的方法可以从控制台运行测试？ 如何解决缺少的“路线”，以便可以从Rails控制台运行测试？ 还是我的目标不明智？