class RSpec::Mocks::AnyInstance::Recorder

@see Chain
@see AnyInstance
Further constraints are stored in instances of [Chain](Chain).
instances of ‘TheClass`.
which records stubs and message expectations for later playback on
Given a class `TheClass`, `TheClass.any_instance` returns a `Recorder`,

def already_observing?(method_name)

def already_observing?(method_name)
  @observed_methods.include?(method_name)
end

def backup_method!(method_name)

def backup_method!(method_name)
  alias_method_name = build_alias_method_name(method_name)
  @klass.class_eval do
    alias_method alias_method_name, method_name
  end if public_protected_or_private_method_defined?(method_name)
end

def build_alias_method_name(method_name)

def build_alias_method_name(method_name)
  "__#{method_name}_without_any_instance__"
end

def initialize(klass)

def initialize(klass)
  @message_chains = MessageChains.new
  @observed_methods = []
  @played_methods = {}
  @klass = klass
  @expectation_set = false
end

def instance_that_received(method_name)

Other tags:
    Private: -
def instance_that_received(method_name)
  @played_methods[method_name]
end

def mark_invoked!(method_name)

def mark_invoked!(method_name)
  backup_method!(method_name)
  @klass.class_eval(<<-EOM, __FILE__, __LINE__)
    def #{method_name}(*args, &blk)
      method_name = :#{method_name}
      klass = ::Object.instance_method(:method).bind(self).call(:#{method_name}).owner
      invoked_instance = klass.__recorder.instance_that_received(method_name)
      raise RSpec::Mocks::MockExpectationError, "The message '#{method_name}' was received by \#{self.inspect} but has already been received by \#{invoked_instance}"
    end
  EOM
end

def normalize_chain(*args)

def normalize_chain(*args)
  args.shift.to_s.split('.').map {|s| s.to_sym}.reverse.each {|a| args.unshift a}
  yield args.first, args
end

def observe!(method_name)

def observe!(method_name)
  stop_observing!(method_name) if already_observing?(method_name)
  @observed_methods << method_name
  backup_method!(method_name)
  @klass.class_eval(<<-EOM, __FILE__, __LINE__)
    def #{method_name}(*args, &blk)
      klass = ::Object.instance_method(:method).bind(self).call(:#{method_name}).owner
      klass.__recorder.playback!(self, :#{method_name})
      self.__send__(:#{method_name}, *args, &blk)
    end
  EOM
end

def playback!(instance, method_name)

Other tags:
    Private: -
def playback!(instance, method_name)
  RSpec::Mocks::space.add(instance)
  message_chains.playback!(instance, method_name)
  @played_methods[method_name] = instance
  received_expected_message!(method_name) if message_chains.has_expectation?(method_name)
end

def public_protected_or_private_method_defined?(method_name)

def public_protected_or_private_method_defined?(method_name)
  @klass.method_defined?(method_name) || @klass.private_method_defined?(method_name)
end

def received_expected_message!(method_name)

def received_expected_message!(method_name)
  message_chains.received_expected_message!(method_name)
  restore_method!(method_name)
  mark_invoked!(method_name)
end

def remove_dummy_method!(method_name)

def remove_dummy_method!(method_name)
  @klass.class_eval do
    remove_method method_name
  end
end

def restore_method!(method_name)

def restore_method!(method_name)
  if public_protected_or_private_method_defined?(build_alias_method_name(method_name))
    restore_original_method!(method_name)
  else
    remove_dummy_method!(method_name)
  end
end

def restore_original_method!(method_name)

def restore_original_method!(method_name)
  alias_method_name = build_alias_method_name(method_name)
  @klass.class_eval do
    remove_method method_name
    alias_method  method_name, alias_method_name
    remove_method alias_method_name
  end
end

def should_not_receive(method_name, &block)

def should_not_receive(method_name, &block)
  observe!(method_name)
  message_chains.add(method_name, NegativeExpectationChain.new(method_name, &block))
end

def should_receive(method_name, &block)

Other tags:
    See: Methods#should_receive -
def should_receive(method_name, &block)
  @expectation_set = true
  observe!(method_name)
  message_chains.add(method_name, PositiveExpectationChain.new(method_name, &block))
end

def stop_all_observation!

Other tags:
    Private: -
def stop_all_observation!
  @observed_methods.each {|method_name| restore_method!(method_name)}
end

def stop_observing!(method_name)

def stop_observing!(method_name)
  restore_method!(method_name)
  @observed_methods.delete(method_name)
end

def stub(method_name_or_method_map, &block)

Other tags:
    See: Methods#stub -
def stub(method_name_or_method_map, &block)
  if method_name_or_method_map.is_a?(Hash)
    method_name_or_method_map.each do |method_name, return_value|
      stub(method_name).and_return(return_value)
    end
  else
    observe!(method_name_or_method_map)
    message_chains.add(method_name_or_method_map, StubChain.new(method_name_or_method_map, &block))
  end
end

def stub!(*)

Other tags:
    Private: -
def stub!(*)
  raise "stub! is not supported on any_instance. Use stub instead."
end

def stub_chain(*method_names_and_optional_return_values, &block)

Other tags:
    See: Methods#stub_chain -
def stub_chain(*method_names_and_optional_return_values, &block)
  normalize_chain(*method_names_and_optional_return_values) do |method_name, args|
    observe!(method_name)
    message_chains.add(method_name, StubChainChain.new(*args, &block))
  end
end

def unstub(method_name)

Other tags:
    See: Methods#unstub -
def unstub(method_name)
  unless @observed_methods.include?(method_name.to_sym)
    raise RSpec::Mocks::MockExpectationError, "The method `#{method_name}` was not stubbed or was already unstubbed"
  end
  message_chains.remove_stub_chains_for!(method_name)
  stop_observing!(method_name) unless message_chains.has_expectation?(method_name)
end

def verify

Other tags:
    Api: - private
def verify
  if @expectation_set && !message_chains.all_expectations_fulfilled?
    raise RSpec::Mocks::MockExpectationError, "Exactly one instance should have received the following message(s) but didn't: #{message_chains.unfulfilled_expectations.sort.join(', ')}"
  end
end