我应该输入＆＃34; rake＆＃34;在终端表单目录00_hello中，得到一个错误，如
(cannot load such file -- test-first-teaching/hello/hello (LoadError)), but instead I keep getting this error:
(in /Users/deianp17/learn_ruby) /Users/deianp17/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- spec_helper (LoadError) from /Users/deianp17/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/configuration.rb:1295:in `block in requires=' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/configuration.rb:1295:in `each' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/configuration.rb:1295:in `requires=' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/configuration_options.rb:109:in `block in process_options_into' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/configuration_options.rb:108:in `each' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/configuration_options.rb:108:in `process_options_into' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/configuration_options.rb:21:in `configure' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/runner.rb:105:in `setup' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/runner.rb:92:in `run' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/runner.rb:78:in `run' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/lib/rspec/core/runner.rb:45:in `invoke' from /Users/deianp17/.rvm/gems/ruby-2.2.1/gems/rspec-core-3.4.2/exe/rspec:4:in `<main>'
现在，我已经尝试了很多东西并环顾google / stackoverflow寻找答案，但没有工作......或许我做错了什么