1 files changed, 53 insertions, 0 deletions
diff --git a/sources/pyside6/tests/QtWidgets/bug_871.py b/sources/pyside6/tests/QtWidgets/bug_871.py
new file mode 100644
index 000000000..4ee9b575a
--- /dev/null
+++ b/sources/pyside6/tests/QtWidgets/bug_871.py
@@ -0,0 +1,53 @@
+# 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.QtGui import QValidator, QIntValidator
+from PySide6.QtWidgets import QLineEdit
+
+'''Bug #871 - http://bugs.pyside.org/show_bug.cgi?id=871'''
+
+
+class BlankIntValidator(QIntValidator):
+    def validate(self, input, pos):
+        if input == '':
+            return QValidator.Acceptable, input, pos
+        else:
+            return QIntValidator.validate(self, input, pos)
+
+
+class Bug871Test(UsesQApplication):
+    def testWithoutValidator(self):
+        edit = QLineEdit()
+        self.assertEqual(edit.text(), '')
+        edit.insert('1')
+        self.assertEqual(edit.text(), '1')
+        edit.insert('a')
+        self.assertEqual(edit.text(), '1a')
+        edit.insert('2')
+        self.assertEqual(edit.text(), '1a2')
+
+    def testWithIntValidator(self):
+        edit = QLineEdit()
+        edit.setValidator(BlankIntValidator(edit))
+        self.assertEqual(edit.text(), '')
+        edit.insert('1')
+        self.assertEqual(edit.text(), '1')
+        edit.insert('a')
+        self.assertEqual(edit.text(), '1')
+        edit.insert('2')
+        self.assertEqual(edit.text(), '12')
+
+
+if __name__ == "__main__":
+    unittest.main()
+