ruby - RSpec 较短的测试失败回溯输出

Question

我正在使用 RSpec(最新版本 2.12.2)来测试我正在处理的一个小型 Rub​​y 类。我的问题是，当 RSpec 测试失败时，测试输出看起来非常冗长，并显示了一个巨大的错误消息列表，几乎是一个完整的回溯。这意味着我必须向上滚动才能看到实际的错误消息和跟踪的顶部。

我相信默认情况下 RSpec 应该这样做，但它似乎并没有为我做这件事。例如，如果我运行 rspec spec/my_spec.rb:132(只运行一个在 L132 上的测试)，我得到这个输出:

 Failure/Error: @f.has_changed?("test").should be_true
   expected: true value
        got: false
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-expectations-2.12.1/lib/rspec/expectations/fail_with.rb:33:in `fail_with'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-expectations-2.12.1/lib/rspec/expectations/handler.rb:33:in `handle_matcher'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-expectations-2.12.1/lib/rspec/expectations/syntax.rb:53:in `should'
 # /Users/JackFranklin/Dropbox/Sites/rubygems/filefixtures/spec/filefixtures_spec.rb:137:in `block (4 levels) in <top (required)>'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example.rb:114:in `instance_eval'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example.rb:114:in `block in run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example.rb:254:in `with_around_each_hooks'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example.rb:111:in `run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:388:in `block in run_examples'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:384:in `map'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:384:in `run_examples'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:369:in `run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:370:in `block in run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:370:in `map'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:370:in `run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:370:in `block in run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:370:in `map'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/example_group.rb:370:in `run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/command_line.rb:28:in `block (2 levels) in run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/command_line.rb:28:in `map'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/command_line.rb:28:in `block in run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/reporter.rb:34:in `report'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/command_line.rb:25:in `run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/runner.rb:80:in `run'
 # /Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.2/lib/rspec/core/runner.rb:17:in `block in autorun'

如您所见，这绝对是巨大的。我没有任何可能会改变传递给 RSpec 的配置的 RSpec 配置文件。

有没有人见过这个？我试过谷歌搜索，但搜索无果。

编辑:然后我设置配置以确保它正在应用默认的回溯清理:

RSpec.configure do |config|
  # RSpec automatically cleans stuff out of backtraces;
  # sometimes this is annoying when trying to debug something e.g. a gem
  config.backtrace_clean_patterns = [
    /\/lib\d*\/ruby\//,
    /bin\//,
    /gems/,
    /spec\/spec_helper\.rb/,
    /lib\/rspec\/(core|expectations|matchers|mocks)/
  ]
end

但这并没有什么不同。查看输出，它应该已过滤掉大部分内容，但似乎未应用配置？

再次编辑:

在我的配置中，我什至可以运行 cleaned_from_backtrace?(line) 来查看是否应该清理一行。这将返回 true:

 config.cleaned_from_backtrace?("/Users/JackFranklin/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-expectations-2.12.1/lib/rspec/expectations/fail_with.rb:33:in `fail_with'")

但终端中的实际输出保持不变!

编辑 3:

我正在使用命令 rspec 运行 RSpec，仅此而已。该项目的 .rspec 文件包含:

--color
--format progress

而且也没有可以应用设置的 ~/.rspec 文件。

Answer 1

所以在与 RSpec 人聊了一会儿之后 on Github ，我设法找到了问题所在。

问题是默认情况下，RSpec 会从回溯中删除与 Regex/gems/匹配的行。我的项目位于名称为 gems 的文件夹中:~/Dropbox/rubygems/myproject，因此回溯的每一行都被删除，当发生这种情况时， RSpec 明智地向您展示了整个回溯。

这解释了我所看到的行为。

它总是像那样愚蠢。我希望如果其他人这样做，也许这个答案会为他们节省一些时间。