1 files changed, 76 insertions, 0 deletions
diff --git a/sources/pyside6/tests/QtCore/qinstallmsghandler_test.py b/sources/pyside6/tests/QtCore/qinstallmsghandler_test.py
new file mode 100644
index 000000000..9c5ae4370
--- /dev/null
+++ b/sources/pyside6/tests/QtCore/qinstallmsghandler_test.py
@@ -0,0 +1,76 @@
+# 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 qInstallMsgHandler'''
+
+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 PySide6.QtCore import (QLibraryInfo, QtMsgType,
+                            QMessageLogContext,
+                            qCritical, qFormatLogMessage, qDebug,
+                            qInstallMessageHandler, qWarning)
+
+
+param = []
+
+
+def handler(msgt, ctx, msg):
+    global param
+    param = [msgt, ctx, msg.strip()]
+
+
+def handleruseless(msgt, ctx, msg):
+    pass
+
+
+class QInstallMsgHandlerTest(unittest.TestCase):
+
+    def tearDown(self):
+        # Ensure that next test will have a clear environment
+        qInstallMessageHandler(None)
+
+    def testNone(self):
+        ret = qInstallMessageHandler(None)
+        self.assertEqual(ret, None)
+
+    @unittest.skipUnless(hasattr(sys, "getrefcount"), f"{sys.implementation.name} has no refcount")
+    def testRet(self):
+        ret = qInstallMessageHandler(None)
+        self.assertEqual(ret, None)
+        refcount = sys.getrefcount(handleruseless)
+        retNone = qInstallMessageHandler(handleruseless)
+        self.assertEqual(sys.getrefcount(handleruseless), refcount + 1)
+        rethandler = qInstallMessageHandler(None)
+        self.assertEqual(rethandler, handleruseless)
+        del rethandler
+        self.assertEqual(sys.getrefcount(handleruseless), refcount)
+
+    def testHandler(self):
+        rethandler = qInstallMessageHandler(handler)
+        if QLibraryInfo.isDebugBuild():
+            qDebug("Test Debug")
+            self.assertEqual(param[0], QtMsgType.QtDebugMsg)
+            self.assertEqual(param[2], "Test Debug")
+        qWarning("Test Warning")
+        self.assertEqual(param[0], QtMsgType.QtWarningMsg)
+        self.assertEqual(param[2], "Test Warning")
+        qCritical("Test Critical")
+        self.assertEqual(param[0], QtMsgType.QtCriticalMsg)
+        self.assertEqual(param[2], "Test Critical")
+
+    def testFormat(self):
+        ctx = QMessageLogContext()
+        s = qFormatLogMessage(QtMsgType.QtInfoMsg, ctx, 'bla')
+        self.assertTrue(s)
+
+
+if __name__ == '__main__':
+    unittest.main()
+