缺少突变体-rspec？

Question

我正在尝试使用存储库中的 ruby 2.1.5+deb8u2 和 ruby-dev 2.1.5+deb8u2 软件包在新安装的 Debian 8.5 上设置一个新的 Ruby 项目。我想在我的项目中包括突变测试。我将 mutant-rspec 添加到我的 Gemfile:

source 'https://rubygems.org'

gem 'rake'
gem 'rspec', require: 'spec'
gem 'mutant-rspec'

Bundler (1.13.0) 似乎安装 gem 就好了

ytg@debian-vm:~/projects/new_project$ bundle install
Fetching gem metadata from https://rubygems.org/..........
Fetching version metadata from https://rubygems.org/.
Using rake 11.2.2
....
Using rspec-core 3.5.3
Using rspec-expectations 3.5.0
Using rspec-mocks 3.5.0
...
Using rspec 3.5.0
...
Installing mutant 0.8.11
Installing mutant-rspec 0.8.11
Bundle complete! 5 Gemfile dependencies, 34 gems now installed.
Use `bundle show [gemname]` to see where a bundled gem is installed.

现在，如果我尝试运行突变体，使用 rake mutant --trace 和 rake 文件

require 'bundler/gem_tasks'
require 'rspec/core/rake_task'
require 'rubocop/rake_task'
require 'mutant'

RSpec::Core::RakeTask.new :spec

task default: :spec

RuboCop::RakeTask.new

task :mutant do
  result = Mutant::CLI.run %w(--since problem9 -Ilib -Ispec
                              --use rspec MyProject*)
  raise 'Mutation testing failed' unless result
end

我收到一条错误消息：

warning: parser/current is loading parser/ruby21, which recognizes
warning: 2.1.8-compliant syntax, but you are running 2.1.5.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.
** Invoke mutant (first_time)
** Execute mutant
Could not load integration "rspec" (you may want to try installing the gem mutant-rspec)
rake aborted!
Mutation testing failed
/home/ytg/projects/new_project/Rakefile:15:in `block in <top (required)>'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/task.rb:248:in `call'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/task.rb:248:in `block in execute'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/task.rb:243:in `each'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/task.rb:243:in `execute'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/task.rb:187:in `block in invoke_with_call_chain'
/usr/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/task.rb:180:in `invoke_with_call_chain'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/task.rb:173:in `invoke'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:152:in `invoke_task'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:108:in `block (2 levels) in top_level'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:108:in `each'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:108:in `block in top_level'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:117:in `run_with_threads'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:102:in `top_level'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:80:in `block in run'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:178:in `standard_exception_handling'
/var/lib/gems/2.1.0/gems/rake-11.2.2/lib/rake/application.rb:77:in `run'
/var/lib/gems/2.1.0/gems/rake-11.2.2/exe/rake:27:in `<top (required)>'
/usr/local/bin/rake:23:in `load'
/usr/local/bin/rake:23:in `<main>'
Tasks: TOP => mutant

如果我尝试直接执行此操作，则会出现相同的消息

ytg@debian-vm:~/projects/new_project$ mutant -I lib/ --use rspec MyProject*
warning: parser/current is loading parser/ruby21, which recognizes
warning: 2.1.8-compliant syntax, but you are running 2.1.5.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.
Could not load integration "rspec" (you may want to try installing the gem mutant-rspec)

据我了解，这是因为 some loading issue。但究竟是什么加载问题？我怎样才能运行 mutant 我的项目？

（我也尝试安装 gem 和 sudo gem install mutant-rspec 以防万一，但它没有帮助，我得到了同样的错误信息。）

Answer 1

您 mutant 运行可能没有在正确的环境中执行。请尝试 bundle exec mutant，这将确保您的 Gemfile 中指定的那个与正确的 gem 集一起使用。

为了帮助调试，请使用 which mutant 确定调用的是哪个版本。 sudo gem install 应该不是的解决方案，我建议 sudo gem uninstall 恢复到原来的位置，否则以后可能会出现问题。

但我认为所有这些都是转移注意力的东西。

对于您的 Rakefile，它实际上并没有向 mutant 脚本发送。您将绕过它并直接前往 Mutant::CLI。这里的问题是没有设置加载路径以使其包含 mutant-rspec:

task :mutant do
  puts $LOAD_PATH # debug: see it's missing load path for mutant-rspec
  require 'bundler/setup' # This line is new
  puts $LOAD_PATH # debug: see how it changes

  result = Mutant::CLI.run %w(--since problem9 -Ilib -Ispec
                              --use rspec MyProject*)
  raise 'Mutation testing failed' unless result
end

或者，bundle exec rake mutant 也应该做同样的事情。我建议 always 使用 bundle exec （或 binstubs），而不是 rake 碰巧在你的路径上。否则很难推理。

缺少突变体-rspec？

Missing mutant-rspec?

ruby

rake

rubygems

rspec

bundler