From 17e810e6eded12ee9e2c15838c84c1ba3e7ae44e Mon Sep 17 00:00:00 2001
From: CPython Developers <>
Date: Sat, 31 Jan 2026 19:37:50 -0500
Subject: [PATCH] Update test_frozen from v3.14.2-288-g06f9c8ca1c

---
 Lib/test/test_frozen.py | 56 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Lib/test/test_frozen.py

diff --git a/Lib/test/test_frozen.py b/Lib/test/test_frozen.py
new file mode 100644
index 000000000..0b4a12bcf
--- /dev/null
+++ b/Lib/test/test_frozen.py
@@ -0,0 +1,56 @@
+"""Basic test of the frozen module (source is in Python/frozen.c)."""
+
+# The Python/frozen.c source code contains a marshalled Python module
+# and therefore depends on the marshal format as well as the bytecode
+# format.  If those formats have been changed then frozen.c needs to be
+# updated.
+#
+# The test_importlib also tests this module but because those tests
+# are much more complicated, it might be unclear why they are failing.
+# Invalid marshalled data in frozen.c could case the interpreter to
+# crash when __hello__ is imported.
+
+import importlib.machinery
+import sys
+import unittest
+from test.support import captured_stdout, import_helper
+
+
+class TestFrozen(unittest.TestCase):
+    def test_frozen(self):
+        name = '__hello__'
+        if name in sys.modules:
+            del sys.modules[name]
+        with import_helper.frozen_modules():
+            import __hello__
+        with captured_stdout() as out:
+            __hello__.main()
+        self.assertEqual(out.getvalue(), 'Hello world!\n')
+
+    def test_frozen_submodule_in_unfrozen_package(self):
+        with import_helper.CleanImport('__phello__', '__phello__.spam'):
+            with import_helper.frozen_modules(enabled=False):
+                import __phello__
+            with import_helper.frozen_modules(enabled=True):
+                import __phello__.spam as spam
+        self.assertIs(spam, __phello__.spam)
+        self.assertIsNot(__phello__.__spec__.loader,
+                         importlib.machinery.FrozenImporter)
+        self.assertIs(spam.__spec__.loader,
+                      importlib.machinery.FrozenImporter)
+
+    def test_unfrozen_submodule_in_frozen_package(self):
+        with import_helper.CleanImport('__phello__', '__phello__.spam'):
+            with import_helper.frozen_modules(enabled=True):
+                import __phello__
+            with import_helper.frozen_modules(enabled=False):
+                import __phello__.spam as spam
+        self.assertIs(spam, __phello__.spam)
+        self.assertIs(__phello__.__spec__.loader,
+                      importlib.machinery.FrozenImporter)
+        self.assertIsNot(spam.__spec__.loader,
+                         importlib.machinery.FrozenImporter)
+
+
+if __name__ == '__main__':
+    unittest.main()