1 files changed, 50 insertions, 0 deletions
diff --git a/sources/pyside6/tests/pysidetest/signal_slot_warning.py b/sources/pyside6/tests/pysidetest/signal_slot_warning.py
new file mode 100644
index 000000000..b94281643
--- /dev/null
+++ b/sources/pyside6/tests/pysidetest/signal_slot_warning.py
@@ -0,0 +1,50 @@
+#!/usr/bin/python
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+''' PYSIDE-315: https://bugreports.qt.io/browse/PYSIDE-315
+    Test that creating a signal in the wrong order triggers a warning. '''
+
+import os
+import sys
+import unittest
+import warnings
+
+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)
+
+import PySide6.QtCore as QtCore
+
+
+class Whatever(QtCore.QObject):
+    echoSignal = QtCore.Signal(str)
+
+    def __init__(self):
+        super().__init__()
+        self.echoSignal.connect(self.mySlot)
+
+    def mySlot(self, v):
+        pass
+
+
+class WarningTest(unittest.TestCase):
+    def testSignalSlotWarning(self):
+        # we create an object. This gives no warning.
+        obj = Whatever()
+        # then we insert a signal after slots have been created.
+        setattr(Whatever, "foo", QtCore.Signal())
+        with warnings.catch_warnings(record=True) as w:
+            # Cause all warnings to always be triggered.
+            warnings.simplefilter("always")
+            # Trigger a warning.
+            obj.foo.connect(obj.mySlot)
+            # Verify some things
+            assert issubclass(w[-1].category, RuntimeWarning)
+            assert "*** Sort Warning ***" in str(w[-1].message)
+            # note that this warning cannot be turned into an error (too hard)
+
+
+if __name__ == "__main__":
+    unittest.main()