Ruby on rails `rspec——配置自动测试“抛出”；未初始化的常量类：：FileUtils“；

我正在尝试用RSpec设置自动测试。以前从未出现过问题，但当我运行

rspec--configure autotest

时，我得到以下错误/跟踪：

Autotest loads RSpec's Autotest subclass when there is a .rspec file in the project's root directory.
/Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/backward_compatibility.rb:20:in `const_missing': uninitialized constant Class::FileUtils (NameError)
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/command_line_configuration.rb:38:in `create_dot_rspec_file'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/command_line_configuration.rb:29:in `generate'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/command_line_configuration.rb:12:in `run'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/option_parser.rb:101:in `block (2 levels) in parser'
    from /Users/brennon/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/optparse.rb:1277:in `call'
    from /Users/brennon/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/optparse.rb:1277:in `block in parse_in_order'
    from /Users/brennon/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/optparse.rb:1264:in `catch'
    from /Users/brennon/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/optparse.rb:1264:in `parse_in_order'
    from /Users/brennon/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/optparse.rb:1258:in `order!'
    from /Users/brennon/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/optparse.rb:1349:in `permute!'
    from /Users/brennon/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/optparse.rb:1370:in `parse!'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/option_parser.rb:18:in `parse!'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/option_parser.rb:4:in `parse!'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/configuration_options.rb:88:in `command_line_options'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/configuration_options.rb:122:in `custom_options_file'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/configuration_options.rb:65:in `parse_options'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/runner.rb:41:in `run'
    from /Users/brennon/.rvm/gems/ruby-1.9.2-p0@timekeepa/gems/rspec-core-2.5.1/lib/rspec/core/runner.rb:10:in `block in autorun'

---

只需运行

rspec

就可以正常运行，运行

autotest

也可以正常运行，但只加载功能。另外，

require'fileutils'

在irb中返回true。有什么想法吗？

我不知道为什么，看起来这不是正确的解决方案，但是删除并重新创建

.rspec

文件解决了这个问题