Fix the ImportWarning regarding __spec__ and __package__ being None (GH-16003)

(cherry picked from commit 6e1a30b15e73ebc82e6790495fd54cc8971723ec)

Co-authored-by: Xtreak <tir.karthi@gmail.com>

diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index 0bd4772dbb6e7dfcceab97faab66c4fb18b84c9b..9baac3cf3b954a59a0aa8f9e2ac043a5a7e79808 100644 (file)
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -161,9 +161,10 @@ class BuiltinTest(unittest.TestCase):
         self.assertRaises(ValueError, __import__, '')
         self.assertRaises(TypeError, __import__, 'sys', name='sys')
         # Relative import outside of a package with no __package__ or __spec__ (bpo-37409).
-        self.assertRaises(ImportError, __import__, '',
-                          {'__package__': None, '__spec__': None, '__name__': '__main__'},
-                          locals={}, fromlist=('foo',), level=1)
+        with self.assertWarns(ImportWarning):
+            self.assertRaises(ImportError, __import__, '',
+                              {'__package__': None, '__spec__': None, '__name__': '__main__'},
+                              locals={}, fromlist=('foo',), level=1)
         # embedded null character
         self.assertRaises(ModuleNotFoundError, __import__, 'string\x00')