class Shoulda::ActiveRecord::Matchers::ValidateFormatOfMatcher

def description
  "#{@attribute} have a valid format"
end

def initialize(attribute)
  super
end

def matches?(subject)
  super(subject)
  @expected_message ||= :blank
  return disallows_value_of(@value_to_fail, @expected_message) if @value_to_fail
  allows_value_of(@value_to_pass, @expected_message) if @value_to_pass
end

def not_with(value)
  raise "You may not call both with and not_with" if @value_to_pass
  @value_to_fail = value
  self
end

def with(value)
  raise "You may not call both with and not_with" if @value_to_fail
  @value_to_pass = value
  self
end

def with_message(message)
  @expected_message = message if message
  self
end