错误与：黄瓜功能-n命令

Question

Rspec书说，运行cucumber features -n命令。但它是从黄瓜源给下面的错误

missing argument: -n (OptionParser::MissingArgument) 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/gems/cucumber- 1.2.1/lib/cucumber/cli/options.rb:119:in `parse!' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/gems/cucumber-1.2.1/lib/cucumber/cli/configuration.rb:25:in `parse!' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/gems/cucumber-1.2.1/lib/cucumber/cli/main.rb:55:in `configuration' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/gems/cucumber-1.2.1/lib/cucumber/cli/main.rb:63:in `run_drb_client' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/gems/cucumber-1.2.1/lib/cucumber/cli/main.rb:34:in `execute!' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/gems/cucumber-1.2.1/lib/cucumber/cli/main.rb:20:in `execute' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/gems/cucumber-1.2.1/bin/cucumber:14:in `<top (required)>' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/bin/cucumber:19:in `load' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/bin/cucumber:19:in `<main>' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/bin/ruby_noexec_wrapper:14:in `eval' 
/Users/pajama/.rvm/gems/ruby-1.9.2-p320/bin/ruby_noexec_wrapper:14:in `<main>' 

Answer 1

：

opts.on("-n NAME", "--name NAME", 
     "Only execute the feature elements which match part of the given name.", 
     "If this option is given more than once, it will match against all the", 
     "given names.") 

所以你需要调用-n name_of_the_feature