Ruby:类 `_run_suite' 的未定义方法 `Test::Unit::Runner'

Question

我正在尝试使用命令行命令 ruby​​ unit_test.rb 运行此代码:

# unit_test.rb
require 'test/unit'
class TestWordsFromString < Test::Unit::TestCase
  def test_smth
    assert_equal([], [])
  end
end

我收到以下错误:

Warning: you should require 'minitest/autorun' instead.
Warning: or add 'gem "minitest"' before 'require "minitest/autorun"'
From:
  /Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/test/unit.rb:1:in `<top (required)>'
  unit_tests.rb:1:in `<main>'
MiniTest::Unit::TestCase is now Minitest::Test. From /Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/test/unit/testcase.rb:8:in `<module:Unit>'
/Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/test/unit.rb:676:in `<class:Runner>': undefined method `_run_suite' for class `Test::Unit::Runner' (NameError)
    from /Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/test/unit.rb:261:in `<module:Unit>'
    from /Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/test/unit.rb:15:in `<module:Test>'
    from /Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/test/unit.rb:7:in `<top (required)>'
    from /Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from /Users/User/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
    from unit_tests.rb:1:in `<main>'

我尝试过的:1. 添加require 'minitest/autorun'
2. 使用 bundle exec ruby​​ unit_tests.rb 命令运行测试。
3. 安装 gem 'minitest'

这些解决方案均无效。也许我只是错误地运行了测试？我正在阅读“Programming Ruby”一书。

Answer 1

答案很简单:

Ruby 1.9.x bundles minitest not Test::Unit. Test::Unit bundled in Ruby 1.8.x had not been improved but unbundled Test::Unit (test-unit) is improved actively.

刚刚将 Ruby 1.9 安装到 RVM，现在一切正常!