gh-69605: In test_pyrepl.test_already_imported*, invalidate FS import caches (#143436)

This makes the test robust against file systems with low timestamp resolution, which otherwise would fail to re-import in the tight loop of the test.

diff --git a/Lib/test/test_pyrepl/test_pyrepl.py b/Lib/test/test_pyrepl/test_pyrepl.py
index d0ad960219b5947f67912b15fdf6dfecc58d8af9..b1c6e5c99696dae2b305690e05e834a02402f01a 100644 (file)
--- a/Lib/test/test_pyrepl/test_pyrepl.py
+++ b/Lib/test/test_pyrepl/test_pyrepl.py
@@ -1192,6 +1192,7 @@ class TestPyReplModuleCompleter(TestCase):
                 (dir1 / mod).mkdir()
                 (dir1 / mod / "__init__.py").touch()
                 (dir1 / mod / "foo.py").touch()
+                pkgutil.get_importer(_dir1).invalidate_caches()
                 module = importlib.import_module(mod)
                 assert module.__spec__
                 if mod == "no_origin":