def METHOD_NAME(self):
    with open(PFA, "rb") as f:
        data = f.read()
    chunks = t1Lib.findEncryptedChunks(data)
    self.assertEqual(len(chunks), 3)
    self.assertFalse(chunks[0][0])
    # the second chunk is encrypted
    self.assertTrue(chunks[1][0])
    self.assertFalse(chunks[2][0])