Issue #11049: fix test_forget to work on installed Python, by using a temporary modul...

diff --git a/Lib/test/test_support.py b/Lib/test/test_support.py
index 6322754a83288d2c60fe32847483807d5e7dd02b..589f4828e49dbe10b747138f2a85c5be496dec64 100644 (file)
--- a/Lib/test/test_support.py
+++ b/Lib/test/test_support.py
@@ -55,9 +55,17 @@ class TestSupport(unittest.TestCase):
         support.rmtree(TESTDIRN)
 
     def test_forget(self):
-        import smtplib
-        support.forget("smtplib")
-        self.assertNotIn("smtplib", sys.modules)
+        mod_filename = TESTFN + '.py'
+        with open(mod_filename, 'w') as f:
+            print('foo = 1', file=f)
+        try:
+            mod = __import__(TESTFN)
+            self.assertIn(TESTFN, sys.modules)
+
+            support.forget(TESTFN)
+            self.assertNotIn(TESTFN, sys.modules)
+        finally:
+            support.unlink(mod_filename)
 
     def test_HOST(self):
         s = socket.socket()