1 files changed, 85 insertions, 0 deletions
diff --git a/sources/pyside6/tests/pysidetest/signalinstance_equality_test.py b/sources/pyside6/tests/pysidetest/signalinstance_equality_test.py
new file mode 100644
index 000000000..5faaa38d4
--- /dev/null
+++ b/sources/pyside6/tests/pysidetest/signalinstance_equality_test.py
@@ -0,0 +1,85 @@
+# Copyright (C) 2022 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 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 helper.usesqapplication import UsesQApplication
+
+from PySide6.QtCore import QFile, QObject, QTimer, Signal, SignalInstance, Slot
+from PySide6.QtWidgets import QSlider
+
+
+class C(QObject):
+    custom_signal = Signal()
+
+
+class D(C):
+    pass
+
+
+class TestSignalInstance(unittest.TestCase):
+    def test_signal_instances_are_equal(self):
+        o = QTimer()
+        self.assertTrue(o.timeout == o.timeout)
+
+    def test_inherited_signal_instances_are_equal(self):
+        o = QFile()
+        self.assertTrue(o.readyRead == o.readyRead)
+
+    def test_custom_signal_instances_are_equal(self):
+        o = C()
+        self.assertTrue(o.custom_signal == o.custom_signal)
+
+    def test_custom_inherited_signal_instances_are_equal(self):
+        o = D()
+        self.assertTrue(o.custom_signal == o.custom_signal)
+
+    # additional tests of old errors from 2010 or so
+    def test_uninitialized_SignalInstance(self):
+        # This will no longer crash
+        print(SignalInstance())
+        with self.assertRaises(RuntimeError):
+            SignalInstance().connect(lambda: None)
+        with self.assertRaises(RuntimeError):
+            SignalInstance().disconnect()
+        with self.assertRaises(RuntimeError):
+            SignalInstance().emit()
+
+
+class MyWidget(QSlider):
+    valueChanged = Signal(tuple)
+
+    def __init__(self):
+        super().__init__()
+        self.valueChanged.connect(self._on_change)
+
+    def setValue(self, value):
+        self.valueChanged.emit(value)
+
+    @Slot()
+    def _on_change(self, new_value):
+        print("new_value:", new_value)
+        global result
+        result = new_value
+
+
+class TestRightOrder(UsesQApplication):
+    def test_rightOrder(self):
+        wdg = MyWidget()
+
+        # PYSIDE-1751: Fixes the wrong behavior we got on >=6.2
+        #     PySide <=6.1.3 prints "new_value: (30, 40)"
+        #     PySide >=6.2 prints "new_value: 0"
+        wdg.setValue((30, 40))
+        self.assertEqual(result, (30, 40))
+
+
+if __name__ == '__main__':
+    unittest.main()