def testRawData(self):
data = QDataStream()
self.assertEqual(data.readRawData(4), None)
ba = QByteArray()
data = QDataStream(ba, QIODevice.WriteOnly)
data.writeRawData('AB\x00C')
self.assertEqual(ba.data(), py3k.b('AB\x00C'))
data = QDataStream(ba)
self.assertEqual(data.readRawData(4), py3k.b('AB\x00C'))
