#!/usr/bin/python
#

# Copyright (C) 2014 Google Inc.
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"""Script for unittesting the bitarray utility functions"""

import unittest
import testutils
from bitarray import bitarray

from ganeti import errors
from ganeti.utils import bitarrays


_FREE = bitarray("11100010")
_FULL = bitarray("11111111")


class GetFreeSlotTest(unittest.TestCase):
  """Test function that finds a free slot in a bitarray"""

  def testFreeSlot(self):
    self.assertEquals(bitarrays.GetFreeSlot(_FREE), 3)

  def testReservedSlot(self):
    self.assertRaises(errors.GenericError,
                      bitarrays.GetFreeSlot,
                      _FREE, slot=1)

  def testNoFreeSlot(self):
    self.assertRaises(errors.GenericError,
                      bitarrays.GetFreeSlot,
                      _FULL)

  def testGetAndReserveSlot(self):
    self.assertEquals(bitarrays.GetFreeSlot(_FREE, slot=5, reserve=True), 5)
    self.assertEquals(_FREE, bitarray("11100110"))


if __name__ == "__main__":
  testutils.GanetiTestProgram()