class RSpec::Mocks::Constant

def self.original(name)
  mutator = ::RSpec::Mocks.space.constant_mutator_for(name)
  mutator ? mutator.to_constant : unmutated(name)
end

def self.unmutated(name)
  previously_defined = !!recursive_const_defined?(name)
rescue NameError
  new(name) do |c|
    c.valid_name = false
  end
else
  new(name) do |const|
    const.previously_defined = previously_defined
    const.original_value = recursive_const_get(name) if previously_defined
  end
end

def hidden?
  @hidden
end

def initialize(name)
  @name = name
  @previously_defined = false
  @stubbed = false
  @hidden = false
  @valid_name = true
  yield self if block_given?
end

def mutated?
  @stubbed || @hidden
end

def previously_defined?
  @previously_defined
end

def stubbed?
  @stubbed
end

def to_s
  "#<#{self.class.name} #{name}>"
end

def valid_name?
  @valid_name
end