module RSpec

def self.clear_remaining_example_groups
  world.example_groups.clear
end

def self.configuration
  @configuration ||= RSpec::Core::Configuration.new
end

def self.configure
  warn_about_deprecated_configure if RSpec.world.example_groups.any?
  yield configuration if block_given?
end

def self.reset
  world.reset
  configuration.reset
end

def self.wants_to_quit
  world.wants_to_quit
end

def self.wants_to_quit=(maybe)
  world.wants_to_quit=(maybe)
end

def self.warn_about_deprecated_configure
  warn <<-NOTICE
*************************************************************
ECATION WARNING: you are using deprecated behaviour that will
emoved from RSpec 3.
have set some configuration options after an example group has
ady been defined.  In RSpec 3, this will not be allowed.  All
iguration should happen before the first example group is
ned.  The configuration is happening at:
caller[1]}
*************************************************************
CE
end

def self.world
  @world ||= RSpec::Core::World.new
end

def deprecate(method, alternate_method=nil, version=nil)
  version_string = version ? "rspec-#{version}" : "a future version of RSpec"
  message = <<-NOTICE
*************************************************************
ECATION WARNING: you are using deprecated behaviour that will
emoved from #{version_string}.
ller(0)[2]}
method} is deprecated.
CE
  if alternate_method
    message << <<-ADDITIONAL
ease use #{alternate_method} instead.
TIONAL
  end
  message << "*****************************************************************"
  warn_deprecation(message)
end

def warn_deprecation(message)
  send :warn, message
end