class GovukSchemas::RandomSchemaGenerator

def generate_random_array(props)
  min = props["minItems"] || 0
  max = props["maxItems"] || 10
  unique = props["uniqueItems"] == true
  num_items = @random.rand(min..max)
  items = []
  attempts = 0
  max_attempts = num_items * 100
  until items.length == num_items
    # sometimes arrays don't have `items` specified, not sure if this is a bug
    new_value = generate_value(props["items"] || {})
    if unique && items.include?(new_value)
      attempts += 1
      raise "Failed to create a unique array item after #{max_attempts} attempts" if attempts >= max_attempts
      next
    end
    attempts = 0
    items << new_value
  end
  items
end