# file spec/models/my_lib_spec.rb
require 'spec_helper'
require 'lib/services/my_lib'

describe "MyLib" do

  it "should do something" do
...

lib看起来像这样：

# file lib/services/my_lib.rb
class MyLib

  def self.do_something
  ...

在Ruby 1.8.7(REE)中,测试运行良好：

$ruby -v   
ruby 1.8.7 (2011-02-18 patchlevel 334) [i686-darwin11.1.0],MBARI 0x6770,Ruby
Enterprise Edition 2011.03
$rspec ./spec/models/my_lib_spec.rb
..

Finished in 1.4 seconds
2 examples,0 failures

在Ruby 1.9.2中,我收到一个错误,没有这样的文件加载：

$ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin11.1.0]
$rspec ./spec/models/my_lib_spec.rb
/Users/tmangner/.rvm/gems/ruby-1.9.2-p290@madgoal/gems/activesupport-
3.2.2/lib/active_support/dependencies.rb:251:in `require': no such file
to load -- lib/services/my_lib (LoadError)

我没有线索,什么让Ruby 1.9找不到lib.