TypeError: ActiveSupport is not a class

Question

大家好，在此先感谢您的反馈。

我有一个新的 rails 5.0.4 项目（ruby 2.3.4p301（2017-03-30 修订版 58214）[x86_64-darwin15]），我遇到了一个问题运行 我的第一个迷你测试通过。

命令：

bin/rails test

错误

TypeError: ActiveSupport is not a class
<sanatized>/ps/tekkedout-dnd-tools/test/test_helper.rb:5:in `<top (required)>'
<sanatized>/.rvm/gems/ruby-2.3.4/gems/activesupport-5.0.4/lib/active_support/dependencies.rb:293:in `require'
<sanatized>/.rvm/gems/ruby-2.3.4/gems/activesupport-5.0.4/lib/active_support/dependencies.rb:293:in `block in require'
<sanatized>/.rvm/gems/ruby-2.3.4/gems/activesupport-5.0.4/lib/active_support/dependencies.rb:259:in `load_dependency'
<sanatized>/.rvm/gems/ruby-2.3.4/gems/activesupport-5.0.4/lib/active_support/dependencies.rb:293:in `require'
<sanatized>/ps/tekkedout-dnd-tools/test/models/spell_test.rb:1:in `<top (required)>'

test_helper.rb

ENV["RAILS_ENV"] ||= "test"
require File.expand_path("../../config/environment", __FILE__)
require "rails/test_help"

class ActiveSupport
  class TestCase
    # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
    fixtures :all

    # Add more helper methods to be used by all tests here...
  end
end

更新

看起来在实施 rubocop 时我做了一些仓促的更改并且还没有开始我的规范。

差异如下：

-class ActiveSupport::TestCase
-  # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
-  fixtures :all
+class ActiveSupport
+  class TestCase
+    # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
+    fixtures :all

-  # Add more helper methods to be used by all tests here...
+    # Add more helper methods to be used by all tests here...
+  end

Answer 1

ActiveSupport 是 不是 class 而是 模块:

ActiveSupport.class
#=> Module

要修补 ActiveSupport::TestCase class，试试这个：

module ActiveSupport
  class TestCase
    # ...
  end
end

Answer 2

我想你想要的是：

class ActiveSupport::TestCase
  [...]
end

ActiveSupport 是 模块 ，而不是 class。它在这里用作 TestCase class 的命名空间。这是 active_support 5.0.2 中的相关代码：https://github.com/rails/rails/blob/v5.0.2/activesupport/lib/active_support/test_case.rb#L14