如何在RSpec 2中缩短测试失败的回溯？

Question

当我的规格出现错误时,我收到如下消息:

Vendor should reject duplicate names
     Failure/Error: user_with_duplicate_email.should_not be_valid
     expected valid? to return false, got true
     # /home/kevin/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rspec-expectations-2.3.0/lib/rspec/expectations/fail_with.rb:29:in `fail_with'
     # /home/kevin/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rspec-expectations-2.3.0/lib/rspec/expectations/handler.rb:44:in `handle_matcher'
     # /home/kevin/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/rspec-expectations-2.3.0/lib/rspec/expectations/extensions/kernel.rb:50:in `should_not'
.
.
about 15 more lines
.
.
     # /home/kevin/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/drb/drb.rb:1592:in `block (2 levels) in main_loop'
     # /home/kevin/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/drb/drb.rb:1588:in `loop'
     # /home/kevin/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/drb/drb.rb:1588:in `block in main_loop'

我正在运行Ruby 1.0.2,rails(3.0.3)和rspec(2.3.0).M .rspec配置文件只指定了两个选项:

--drb --colour

如何关闭扩展跟踪？

Answer 1

在spec_helper.rb可以过滤回溯使用下面的代码片段:

RSpec.configure do |config|
  # RSpec automatically cleans stuff out of backtraces;
  # sometimes this is annoying when trying to debug something e.g. a gem

  # RSpec 3:
  # config.backtrace_exclusion_patterns = [
  # RSpec 2:
  config.backtrace_clean_patterns = [
    /\/lib\d*\/ruby\//,
    /bin\//,
    /gems/,
    /spec\/spec_helper\.rb/,
    /lib\/rspec\/(core|expectations|matchers|mocks)/
  ]
end