Rspec / mocks引发未初始化的常量BasicObject :: RSpec
我刚刚安装了rspec和rspec-mocks，但我无法运行最简单的设置
irb(main):001:0> require 'rspec' => true irb(main):004:0> require 'rspec/mocks' => false irb(main):006:0> RSpec::Mocks::setup(Object.new) NameError: uninitialized constant BasicObject::RSpec from /usr/local/Cellar/ruby/1.9.1-p376/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.13.0/lib/rspec/mocks.rb:60:in `block in add_extensions' from /usr/local/Cellar/ruby/1.9.1-p376/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.13.0/lib/rspec/mocks.rb:60:in `class_eval' from /usr/local/Cellar/ruby/1.9.1-p376/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.13.0/lib/rspec/mocks.rb:60:in `add_extensions' from /usr/local/Cellar/ruby/1.9.1-p376/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.13.0/lib/rspec/mocks.rb:11:in `setup' from (irb):6 from /usr/local/Cellar/ruby/1.9.1-p376/bin/irb:12:in `' 我想知道什么是错的，我需要加载一些其他的gem吗？
如果你坚持使用Ruby 1.9.1，我想我已经为你找到了一个解决方案，但是一个警告 – 这是一个黑客攻击！
如果查看错误消息，则表示失败位于/lib/rspec/mocks.rb的第60行。 让我们来看看： https ： //github.com/rspec/rspec-mocks/blob/v2.13.0/lib/rspec/mocks.rb
def add_extensions method_host.class_eval { include RSpec::Mocks::Methods } # (line 60) Class.class_eval { include RSpec::Mocks::AnyInstance } $_rspec_mocks_extensions_added = true end
请注意，此私有方法的第一行（第60行）正在调用’method_host’。 所以让我们看一下私有方法’method_host’的几行：
def method_host # On 1.8.7, Object.ancestors.last == Kernel but # things blow up if we include `RSpec::Mocks::Methods` # into Kernel...not sure why. return Object unless defined?(::BasicObject) # MacRuby has BasicObject but it's not the root class. return Object unless Object.ancestors.last == ::BasicObject ::BasicObject end
你可以看到有几个条件，它有时会返回’Object’，否则返回’BasicObject’。 所以，它让我想知道我们是否无法添加自己的条件。
return Object unless defined?(::BasicObject::RSpec)
我们可以通过创建一个文件来测试它，让我们称之为mocks_hack.rb，我们将重新定义’method_host’以包含我们的条件。
module RSpec module Mocks class << self private def method_host # On 1.8.7, Object.ancestors.last == Kernel but # things blow up if we include `RSpec::Mocks::Methods` # into Kernel...not sure why. return Object unless defined?(::BasicObject) # MacRuby has BasicObject but it's not the root class. return Object unless Object.ancestors.last == ::BasicObject # Jon's hack for Anurag Uniyal return Object unless defined?(::BasicObject::RSpec) ::BasicObject end end end end
从mocks_hack.rb的当前目录中，启动irb和以下代码应该“正常”。
require 'rspec' require './mocks_hack' RSpec::Mocks::setup(Object.new)
现在，这附带了一个免责声明 - 这是一个黑客攻击，我不完全明白这种改变的含义可能是什么。 希望它有所帮助并且是一种可行的解决方法。
Jonathan是在正确的轨道上，但问题的根源是与1.8.7的不兼容，因为:: BasicObject仍然存在于Ruby 1.9中。
通过将补丁限制为Ruby 1.8，可以更恰当地指定作者正在修补的适当解决方案：
def method_host # On 1.8.7, Object.ancestors.last == Kernel but # things blow up if we include `RSpec::Mocks::Methods` # into Kernel...not sure why. return Object unless defined?(::BasicObject) && RUBY_VERSION =~ /^1\.8\.\d+/ # MacRuby has BasicObject but it's not the root class. return Object unless Object.ancestors.last == ::BasicObject ::BasicObject end