update checkpoint unittest

Author: seiriosPlus

python/paddle/fluid/tests/unittests/test_checkpoint.py

@@ -14,6 +14,7 @@
 
 import paddle.fluid as fluid
 import unittest
+import os
 
 
 class TestCheckpoint(unittest.TestCase):
@@ -35,15 +36,16 @@ def test_checkpoint(self):
         trainer_args = ["epoch_id", "step_id"]
         epoch_id, step_id = fluid.io.load_trainer_args(
             self.dirname, serial, self.trainer_id, trainer_args)
-        self.assertEqual(self.step_id, step_id)
-        self.assertEqual(self.epoch_id, epoch_id)
+        self.assertEqual(self.step_id, int(step_id))
+        self.assertEqual(self.epoch_id, int(epoch_id))
 
         program = fluid.Program()
         with fluid.program_guard(program):
             exe = fluid.Executor(self.place)
             fluid.io.load_checkpoint(exe, self.dirname, serial, program)
 
         fluid.io.clean_checkpoint(self.dirname, delete_dir=True)
+        self.assertFalse(os.path.isdir(self.dirname))
 
     def save_checkpoint(self):
         config = fluid.CheckpointConfig(self.dirname, self.max_num_checkpoints,