module RSpec::Mocks::Syntax

def self.enable_expect(syntax_host = ::RSpec::Mocks::ExampleMethods)
  return if expect_enabled?(syntax_host)
  syntax_host.class_exec do
    def receive(method_name, &block)
      Matchers::Receive.new(method_name, block)
    end
    def receive_messages(message_return_value_hash)
      matcher = Matchers::ReceiveMessages.new(message_return_value_hash)
      matcher.warn_about_block if block_given?
      matcher
    end
    def receive_message_chain(*messages, &block)
      Matchers::ReceiveMessageChain.new(messages, &block)
    end
    def allow(target)
      AllowanceTarget.new(target)
    end
    def expect_any_instance_of(klass)
      AnyInstanceExpectationTarget.new(klass)
    end
    def allow_any_instance_of(klass)
      AnyInstanceAllowanceTarget.new(klass)
    end
  end
  RSpec::Mocks::ExampleMethods::ExpectHost.class_exec do
    def expect(target)
      ExpectationTarget.new(target)
    end
  end
end