main:Object 的未定义局部变量或方法“模拟”

Question

我正在使用Mocha 进行测试。

2.1.5 :047 > require 'mocha'
  => false 

AFAIK 这意味着 mocha 已经加载并且应该没问题。无论如何，在模拟或存根时：

2.1.5 :048 > mock
NameError: undefined local variable or method `mock' for main:Object
    from (irb):48
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/console.rb:90:in `start'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/console.rb:9:in `start'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/commands_tasks.rb:69:in `console'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands.rb:17:in `<top (required)>'
    from ./test/dummy/bin/rails:4:in `require'
    from ./test/dummy/bin/rails:4:in `<main>'
2.1.5 :049 > Github.expects :repos
NoMethodError: undefined method `expects' for Github:Module
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/github_api-0.12.3/lib/github_api.rb:56:in `method_missing'
    from (irb):49
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/console.rb:90:in `start'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/console.rb:9:in `start'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/commands_tasks.rb:69:in `console'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands.rb:17:in `<top (required)>'
    from ./test/dummy/bin/rails:4:in `require'
    from ./test/dummy/bin/rails:4:in `<main>'
2.1.5 :051 >   stub
NameError: undefined local variable or method `stub' for main:Object
    from (irb):51
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/console.rb:90:in `start'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/console.rb:9:in `start'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/commands_tasks.rb:69:in `console'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
    from /home/dawid/.rvm/gems/ruby-2.1.5/gems/railties-4.1.10/lib/rails/commands.rb:17:in `<top (required)>'
    from ./test/dummy/bin/rails:4:in `require'
    from ./test/dummy/bin/rails:4:in `<main>'

模拟是否应该在 IRB 中工作？

Answer 1

在包含 Mocha::API 之前，我遇到了同样的错误。这将 include 将 Mocha 的方法应用于您的 Object、Module、Class 类，并为您的 irb 会话添加缺少的功能：

$ irb
Welcome to IRB. You are using ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-linux]. Have fun ;)
>> require 'mocha/api' #=> true
>> include Mocha::API #=> Object
>> mock #=> #<Mock:0x2da1ce8>
>> stub #=> #<Mock:0x2d6a680>
>> Object.expects :something #=> #<Expectation:0x256e878 expected exactly once, not yet invoked: Object.something(any_parameters) >