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):
@@ -98,17 +99,17 @@ 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'
-        viz_pass.set("graph_viz_path", graph_viz_path)
-
-        self.check_network_convergence(
-            use_cuda=core.is_compiled_with_cuda(),
-            build_strategy=build_strategy)
-        try:
-            os.stat(graph_viz_path)
-        except os.error:
-            self.assertFalse(True)
+        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(
+                use_cuda=core.is_compiled_with_cuda(),
+                build_strategy=build_strategy)
+            try:
+                os.stat(graph_viz_path)
+            except os.error:
+                self.assertFalse(True)
 
 
 if __name__ == '__main__':