錯誤與：黃瓜功能-n命令

Question

Rspec書說，運行cucumber features -n命令。但它是從黃瓜源給下面的錯誤

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.") 

所以你需要調用-n name_of_the_feature