1 files changed, 55 insertions, 0 deletions
diff --git a/sources/pyside6/tests/signals/anonymous_slot_leak_test.py b/sources/pyside6/tests/signals/anonymous_slot_leak_test.py
new file mode 100644
index 000000000..560a08659
--- /dev/null
+++ b/sources/pyside6/tests/signals/anonymous_slot_leak_test.py
@@ -0,0 +1,55 @@
+# Copyright (C) 2023 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+import os
+import sys
+import unittest
+
+from functools import partial
+from pathlib import Path
+sys.path.append(os.fspath(Path(__file__).resolve().parents[1]))
+from init_paths import init_test_paths
+init_test_paths(False)
+
+from PySide6.QtWidgets import QWidget
+from helper.usesqapplication import UsesQApplication
+
+
+have_debug = hasattr(sys, "gettotalrefcount")
+
+
+class LeakerLambda():
+    def __init__(self, widget):
+        widget.windowIconChanged.connect(lambda *args: None)
+
+
+class LeakerFunctoolsPartial():
+    def __init__(self, widget):
+        widget.windowIconChanged.connect(partial(int, 0))
+
+
+class TestBugPYSIDE2299(UsesQApplication):
+    def leak(self, leaker):
+        widget = QWidget()
+
+        # Warm-up
+        leaker(widget)
+
+        refs_before = sys.gettotalrefcount()
+        for _ in range(1000):
+            leaker(widget)
+        refs_after = sys.gettotalrefcount()
+
+        self.assertAlmostEqual(refs_after - refs_before, 0, delta=10)
+
+    @unittest.skipUnless(have_debug, "You need a debug build")
+    def test_lambda(self):
+        self.leak(LeakerLambda)
+
+    @unittest.skipUnless(have_debug, "You need a debug build")
+    def test_functools_partial(self):
+        self.leak(LeakerFunctoolsPartial)
+
+
+if __name__ == '__main__':
+    unittest.main()