bpo-40492: Fix --outfile with relative path when the program changes it working dir (GH-19910)

1 files changed, 15 insertions, 1 deletions

diff --git a/Lib/test/test_profile.py b/Lib/test/test_profile.py
index 738be85..1bdf30a 100644
--- a/Lib/test/test_profile.py
+++ b/Lib/test/test_profile.py
@@ -7,7 +7,7 @@ import os
 from difflib import unified_diff
 from io import StringIO
 from test.support import run_unittest
-from test.support.os_helper import TESTFN, unlink
+from test.support.os_helper import TESTFN, unlink, temp_dir, change_cwd
 from contextlib import contextmanager
 
 import profile
@@ -112,6 +112,20 @@ class ProfileTest(unittest.TestCase):
         assert_python_ok('-m', self.profilermodule.__name__,
                          '-m', 'timeit', '-n', '1')
 
+    def test_output_file_when_changing_directory(self):
+        with temp_dir() as tmpdir, change_cwd(tmpdir):
+            os.mkdir('dest')
+            with open('demo.py', 'w') as f:
+                f.write('import os; os.chdir("dest")')
+
+            assert_python_ok(
+                '-m', self.profilermodule.__name__,
+                '-o', 'out.pstats',
+                'demo.py',
+            )
+
+            self.assertTrue(os.path.exists('out.pstats'))
+
 
 def regenerate_expected_output(filename, cls):
     filename = filename.rstrip('co')