1 files changed, 150 insertions, 0 deletions
diff --git a/sources/pyside6/tests/QtCore/qobject_event_filter_test.py b/sources/pyside6/tests/QtCore/qobject_event_filter_test.py
new file mode 100644
index 000000000..ab7a1b6ad
--- /dev/null
+++ b/sources/pyside6/tests/QtCore/qobject_event_filter_test.py
@@ -0,0 +1,150 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+'''Test cases for QObject.eventFilter'''
+
+import gc
+import os
+import sys
+import unittest
+import weakref
+
+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.QtCore import QObject, QTimerEvent
+
+from helper.usesqapplication import UsesQApplication
+
+
+class FilterObject(QObject):
+    '''Filter object for the basic test'''
+    def __init__(self, obj=None, event_type=None, *args):
+        # Creates a new filter object
+        QObject.__init__(self, *args)
+        self.obj = obj
+        self.event_type = event_type
+        self.events_handled = 0
+        self.events_bypassed = 0
+
+    def setTargetObject(self, obj):
+        # Sets the object that will be filtered
+        self.obj = obj
+
+    def eventFilter(self, obj, event):
+        '''Just checks if is the correct object and event type
+        incrementing counter until reaching the limit. After that it
+        stops filtering the events for the object.'''
+        if (self.obj == obj):
+            if isinstance(event, self.event_type) and self.events_handled < 5:
+                self.events_handled += 1
+                return True
+            else:
+                self.events_bypassed += 1
+                return False
+        else:
+            return QObject.eventFilter(self, obj, event)
+
+
+class FilteredObject(QObject):
+    '''Class that will be filtered. Quits the app after 5 timer events'''
+    def __init__(self, app, *args):
+        QObject.__init__(self, *args)
+        self.app = app
+        self.times_called = 0
+
+    def timerEvent(self, evt):
+        # Overridden method
+        self.times_called += 1
+
+        if self.times_called == 5:
+            self.app.quit()
+
+
+class PolymorphicIdFilterObject(QObject):
+    """PYSIDE-2675: Check whether QChildEvent.added() is accessible via PolymorphicId"""
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        self.added = False
+
+    def event(self, event):
+        self.added = event.added()
+        return False
+
+
+class TestQObjectEventFilterPython(UsesQApplication):
+    '''QObject.eventFilter - Reimplemented in python
+    Filters 5 TimerEvents and then bypasses the other events to the
+    timerEvent method. After 5 runs, the timerEvent method will ask
+    the core application to exit'''
+    def setUp(self):
+        # Acquire resources
+        UsesQApplication.setUp(self)
+        self.obj_filter = FilterObject(event_type=QTimerEvent)
+
+    def tearDown(self):
+        # Release resources
+        del self.obj_filter
+        # PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
+        gc.collect()
+        UsesQApplication.tearDown(self)
+
+    def testEventFilter(self):
+        # QObject.eventFilter reimplemented in python
+        filtered = FilteredObject(self.app)
+        filtered.installEventFilter(self.obj_filter)
+        self.obj_filter.setTargetObject(filtered)
+
+        filtered.startTimer(0)
+
+        self.app.exec()
+
+        self.assertEqual(filtered.times_called, 5)
+        self.assertEqual(self.obj_filter.events_handled, 5)
+
+    def testPolymorphicId(self):
+        testObject = PolymorphicIdFilterObject()
+        t2 = QObject(testObject)  # noqa: F841
+        self.assertTrue(testObject.added)
+
+    @unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
+    def testInstallEventFilterRefCountAfterDelete(self):
+        '''Bug 910 - installEventFilter() increments reference count on target object
+        http://bugs.pyside.org/show_bug.cgi?id=910'''
+        obj = QObject()
+        filt = QObject()
+
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+        obj.installEventFilter(filt)
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+
+        wref = weakref.ref(obj)
+        del obj
+        self.assertEqual(wref(), None)
+
+    @unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
+    def testInstallEventFilterRefCountAfterRemove(self):
+        # Bug 910
+        obj = QObject()
+        filt = QObject()
+
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+        obj.installEventFilter(filt)
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+        obj.removeEventFilter(filt)
+        self.assertEqual(sys.getrefcount(obj), 2)
+        self.assertEqual(sys.getrefcount(filt), 2)
+
+        wref = weakref.ref(obj)
+        del obj
+        self.assertEqual(wref(), None)
+
+
+if __name__ == '__main__':
+    unittest.main()