安装simplecov后出现JRuby rspec异常

Question

尝试将simplecov添加到我的Rails应用程序(Jruby 1.6.4，Ruby 1.9.2，Windows)。我在Gemfile中添加了'simplecov‘，在我的spec_helper顶部添加了包安装和以下内容：

require 'rubygems'
require 'simplecov'
SimpleCov.start 'rails' 

运行时，我得到以下异常：

$ bundle exec rspec --debug spec

No DRb server is running. Running in local process instead ...
c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/ruby-debug-base-0.10.4-java/lib/ruby-debug-base.rb:214 warning: tracing (e.g. set_trace_func) will not capture all events without --debug flag
c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/simplecov-0.5.4/lib/simplecov.rb:33 warning: tracing (e.g. set_trace_func) will not capture all events without --debug flag
LoadError: load error: rails/railtie -- java.lang.NegativeArraySizeException: null
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/engine.rb:1
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/engine.rb:1
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/plugin.rb:4
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails/application.rb:10
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/railties-3.1.0/lib/rails.rb:1
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/actionpack-3.1.0/lib/action_controller/railtie.rb:5
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/railsProjects/txprepaid/config/application.rb:2
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/railsProjects/txprepaid/config/environment.rb:13
          require at org/jruby/RubyKernel.java:1047
           (root) at c:/dev/railsProjects/txprepaid/spec/spec_helper.rb:1
             load at org/jruby/RubyKernel.java:1073
  load_spec_files at c:/dev/railsProjects/txprepaid/spec/controllers/dictionary_controller_spec.rb:459
          collect at org/jruby/RubyArray.java:2344
  load_spec_files at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/rspec-core-2.7.1/lib/rspec/core/configuration.rb:459
              run at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/rspec-core-2.7.1/lib/rspec/core/command_line.rb:18
   run_in_process at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/rspec-core-2.7.1/lib/rspec/core/runner.rb:80
              run at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/rspec-core-2.7.1/lib/rspec/core/runner.rb:66
          autorun at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/rspec-core-2.7.1/lib/rspec/core/runner.rb:10
ArgumentError: same file: c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/simplecov-html-0.5.3/lib/../assets/app.js and C:/dev/railsProjects/txprepaid/coverage/assets/0.5.3/app.js
   fu_each_src_dest at c:/dev/apps/jruby-1.6.4/lib/ruby/1.9/fileutils.rb:1417
  fu_each_src_dest0 at c:/dev/apps/jruby-1.6.4/lib/ruby/1.9/fileutils.rb:1432
   fu_each_src_dest at c:/dev/apps/jruby-1.6.4/lib/ruby/1.9/fileutils.rb:1416
               cp_r at c:/dev/apps/jruby-1.6.4/lib/ruby/1.9/fileutils.rb:432
             format at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/simplecov-html-0.5.3/lib/simplecov-html.rb:15
               each at org/jruby/RubyArray.java:1603
             format at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/simplecov-html-0.5.3/lib/simplecov-html.rb:14
            format! at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/simplecov-0.5.4/lib/simplecov/result.rb:90
            at_exit at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/simplecov-0.5.4/lib/simplecov/configuration.rb:133
               call at org/jruby/RubyProc.java:262
             (root) at c:/dev/apps/jruby-1.6.4/lib/ruby/gems/1.8/gems/simplecov-0.5.4/lib/simplecov/defaults.rb:47

Answer 1

从下面的链接可以看出，并非所有的覆盖支持在JRuby中都可用，这可能会影响simplecov，因为它依赖于Ruby1.9中预期的内置覆盖功能。

https://github.com/colszowka/simplecov/issues/86

http://jira.codehaus.org/browse/JRUBY-6106

http://jira.codehaus.org/browse/JRUBY-5935

Answer 2

您可以尝试在1.9模式下使用jruby。您可以通过-1.9，但我通常将

JRUBY_OPTS="--1.9"

在我的.bashrc里。虽然不确定如何在Windows中设置环境变量。