module RSpec::Mocks::TestDouble

def ==(other)

target.
the comparison, we're sure the call gets delegated to the proxy
ActiveRecords belongs_to proxy objects. By making the other object run
This allows for comparing the mock to other objects that proxy such as 
def ==(other)
  other == __mock_proxy
end

def __build_mock_proxy(order_group) 

def __build_mock_proxy(order_group)
  TestDoubleProxy.new(self, order_group, @name)
end

def __build_mock_proxy_unless_expired(order_group)

Other tags:
    Private: - 
def __build_mock_proxy_unless_expired(order_group)
  __raise_expired_error or __build_mock_proxy(order_group)
end

def __disallow_further_usage!

Other tags:
    Private: - 
def __disallow_further_usage!
  @__expired = true
end

def __mock_proxy 

def __mock_proxy
  ::RSpec::Mocks.space.proxy_for(self)
end

def __raise_expired_error 

def __raise_expired_error
  return false unless @__expired
  ErrorGenerator.new(self, @name).raise_expired_test_double_error
end

def as_null_object

returned.
are declared, they'll work as expected. If not, the receiver is
Tells the object to respond to all messages. If specific stub values 
def as_null_object
  __mock_proxy.as_null_object
end

def assign_stubs(stubs) 

def assign_stubs(stubs)
  stubs.each_pair do |message, response|
    __mock_proxy.add_simple_stub(message, response)
  end
end

def freeze

doubles.
Override for default freeze implementation to prevent freezing of test 
def freeze
  RSpec.warn_with("WARNING: you attempted to freeze a test double. This is explicitly a no-op as freezing doubles can lead to undesired behaviour when resetting tests.")
end

def initialize(name=nil, stubs={})

messages only)
Creates a new test double with a `name` (that will be used in error 
def initialize(name=nil, stubs={})
  @__expired = false
  if Hash === name && stubs.empty?
    stubs = name
    @name = nil
  else
    @name = name
  end
  assign_stubs(stubs)
end

def initialize_copy(other) 

def initialize_copy(other)
  as_null_object if other.null_object?
  super
end

def inspect

Other tags:
    Private: - 
def inspect
  "#<#{self.class}:#{sprintf '0x%x', self.object_id} @name=#{@name.inspect}>"
end

def method_missing(message, *args, &block) 

def method_missing(message, *args, &block)
  proxy = __mock_proxy
  proxy.record_message_received(message, *args, &block)
  if proxy.null_object?
    case message
    when :to_int        then return 0
    when :to_a, :to_ary then return nil
    when :to_str        then return to_s
    else return self
    end
  end
  # Defined private and protected methods will still trigger `method_missing`
  # when called publicly. We want ruby's method visibility error to get raised,
  # so we simply delegate to `super` in that case.
  # ...well, we would delegate to `super`, but there's a JRuby
  # bug, so we raise our own visibility error instead:
  # https://github.com/jruby/jruby/issues/1398
  visibility = proxy.visibility_for(message)
  if visibility == :private || visibility == :protected
    ErrorGenerator.new(self, @name).raise_non_public_error(
      message, visibility
    )
  end
  # Required wrapping doubles in an Array on Ruby 1.9.2
  raise NoMethodError if [:to_a, :to_ary].include? message
  proxy.raise_unexpected_message_error(message, *args)
end

def null_object?

Returns true if this object has received `as_null_object` 
def null_object?
  __mock_proxy.null_object?
end

def respond_to?(message, incl_private=false)

Other tags:
    Private: - 
def respond_to?(message, incl_private=false)
  __mock_proxy.null_object? ? true : super
end

def to_s

Other tags:
    Private: - 
def to_s
  inspect.gsub('<','[').gsub('>',']')
end