text: from PyObjCTools.TestSupport import *
  
  import objc
  import sys
  
  class TestAllocateBuffer(TestCase):
      def testBadLengths(self):
          self.assertRaises(ValueError, objc.allocateBuffer, 0)
          self.assertRaises(ValueError, objc.allocateBuffer, -1000)
  
      def testBuffer(self):
          b = objc.allocateBuffer(10000)
          self.assertEqual(len(b), 10000)
  
          if sys.version_info[0] == 2:
              for i in range(0,10000):
                  b[i] = chr(i % 256)
  
              b[5:10] = b[1:6]
              b[5:10] = 'abcde'
              try:
                  b[5:10] = 'abcdefghijk'
              except TypeError as r:
                  if str(r).find("right operand length must match slice length") is not 0:
                      raise
  
          else:
              self.assertIsInstance(b, bytearray)
  
  if __name__ == '__main__':
      main()
  