class Shoulda::Matchers::ActiveModel::NumericalityMatchers::RangeMatcher

def build_comparison_submatcher(value, operator)
  ComparisonMatcher.new(@numericality_matcher, value, operator).
    for(@attribute).
    with_message(@message).
    on(@context)
end

def build_submatchers
  submatcher_combos.map do |value, operator|
    build_comparison_submatcher(value, operator)
  end
end

def initialize(numericality_matcher, attribute, range)
  super(attribute)
  unless numericality_matcher.respond_to? :diff_to_compare
    raise ArgumentError, 'numericality_matcher is invalid'
  end
  @numericality_matcher = numericality_matcher
  @range = range
  @attribute = attribute
end

def matches?(subject)
  @subject = subject
  submatchers.matches?(subject)
end

def range_description
  "from #{Shoulda::Matchers::Util.inspect_range(@range)}"
end

def simple_description
  description = ''
  if expects_strict?
    description << ' strictly'
  end
  description +
    "disallow :#{attribute} from being a number that is not " +
    range_description
end

def submatcher_combos
  @range.minmax.zip(OPERATORS)
end

def submatchers
  @_submatchers ||= NumericalityMatchers::Submatchers.new(build_submatchers)
end