1 files changed, 70 insertions, 0 deletions
diff --git a/sources/pyside2/tests/pysidetest/signal_slot_warning.py b/sources/pyside2/tests/pysidetest/signal_slot_warning.py
new file mode 100644
index 000000000..fd3d41b52
--- /dev/null
+++ b/sources/pyside2/tests/pysidetest/signal_slot_warning.py
@@ -0,0 +1,70 @@
+#!/usr/bin/python
+
+#############################################################################
+##
+## Copyright (C) 2017 The Qt Company Ltd.
+## Contact: https://www.qt.io/licensing/
+##
+## This file is part of the test suite of PySide2.
+##
+## $QT_BEGIN_LICENSE:GPL-EXCEPT$
+## Commercial License Usage
+## Licensees holding valid commercial Qt licenses may use this file in
+## accordance with the commercial license agreement provided with the
+## Software or, alternatively, in accordance with the terms contained in
+## a written agreement between you and The Qt Company. For licensing terms
+## and conditions see https://www.qt.io/terms-conditions. For further
+## information use the contact form at https://www.qt.io/contact-us.
+##
+## GNU General Public License Usage
+## Alternatively, this file may be used under the terms of the GNU
+## General Public License version 3 as published by the Free Software
+## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+## included in the packaging of this file. Please review the following
+## information to ensure the GNU General Public License requirements will
+## be met: https://www.gnu.org/licenses/gpl-3.0.html.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+''' PYSIDE-315: https://bugreports.qt.io/browse/PYSIDE-315
+    Test that creating a signal in the wrong order triggers a warning. '''
+
+from __future__ import print_function
+
+import unittest
+import PySide2.QtCore as QtCore
+import sys
+import warnings
+
+
+class Whatever(QtCore.QObject):
+    echoSignal = QtCore.Signal(str)
+
+    def __init__(self):
+        super(Whatever, self).__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()