Fix the save path problem of UT test_pass_builder. (#33717)

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

@@ -23,6 +23,7 @@ import unittest
 import os
 import sys
 import math
+import tempfile
 
 
 class TestPassBuilder(unittest.TestCase):
@@ -98,8 +99,8 @@ class TestPassBuilder(unittest.TestCase):
 
         pass_builder.remove_pass(len(pass_builder.all_passes()) - 1)
         self.assertEqual(origin_len + 1, len(pass_builder.all_passes()))
-        current_path = os.path.abspath(os.path.dirname(__file__))
-        graph_viz_path = current_path + os.sep + 'tmp' + os.sep + 'test_viz_pass'
+        with tempfile.TemporaryDirectory(prefix="dot_path_") as tmpdir:
+            graph_viz_path = os.path.join(tmpdir, 'test_viz_pass.dot')
             viz_pass.set("graph_viz_path", graph_viz_path)
 
             self.check_network_convergence(