class Shoulda::ActiveRecord::Matchers::HaveDbIndexMatcher

def correct_unique?
  return true if @unique.nil?
  if matched_index.unique == @unique
    true
  else
    @missing = "#{table_name} has an index named #{matched_index.name} " <<
               "of unique #{matched_index.unique}, not #{@unique}."
    false
  end
end