Issue #13968: Fixed newly added recursive glob test.

It was failed when run with non-empty current directory.

Lib/test/test_glob.py

@@ -5,7 +5,7 @@ import sys
 import unittest
 
 from test.support import (TESTFN, skip_unless_symlink,
-                          can_symlink, create_empty_file)
+                          can_symlink, create_empty_file, change_cwd)
 
 
 class GlobTests(unittest.TestCase):
@@ -266,16 +266,18 @@ class SymlinkLoopGlobTests(unittest.TestCase):
     def test_selflink(self):
         tempdir = TESTFN + "_dir"
         os.makedirs(tempdir)
-        create_empty_file(os.path.join(tempdir, 'file'))
-        os.symlink(os.curdir, os.path.join(tempdir, 'link'))
         self.addCleanup(shutil.rmtree, tempdir)
+        with change_cwd(tempdir):
+            os.makedirs('dir')
+            create_empty_file(os.path.join('dir', 'file'))
+            os.symlink(os.curdir, os.path.join('dir', 'link'))
 
             results = glob.glob('**', recursive=True)
             self.assertEqual(len(results), len(set(results)))
             results = set(results)
             depth = 0
             while results:
-            path = os.path.join(*([tempdir] + ['link'] * depth))
+                path = os.path.join(*(['dir'] + ['link'] * depth))
                 self.assertIn(path, results)
                 results.remove(path)
                 if not results:
@@ -290,7 +292,7 @@ class SymlinkLoopGlobTests(unittest.TestCase):
             results = set(results)
             depth = 0
             while results:
-            path = os.path.join(*([tempdir] + ['link'] * depth + ['file']))
+                path = os.path.join(*(['dir'] + ['link'] * depth + ['file']))
                 self.assertIn(path, results)
                 results.remove(path)
                 depth += 1
@@ -300,7 +302,7 @@ class SymlinkLoopGlobTests(unittest.TestCase):
             results = set(results)
             depth = 0
             while results:
-            path = os.path.join(*([tempdir] + ['link'] * depth + ['']))
+                path = os.path.join(*(['dir'] + ['link'] * depth + ['']))
                 self.assertIn(path, results)
                 results.remove(path)
                 depth += 1