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diff --git a/sources/pyside2/tests/QtWidgets/bug_688.py b/sources/pyside2/tests/QtWidgets/bug_688.py
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+++ b/sources/pyside2/tests/QtWidgets/bug_688.py
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+#############################################################################
+##
+## Copyright (C) 2016 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.
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+''' Test bug 688: http://bugs.openbossa.org/show_bug.cgi?id=688'''
+
+import unittest
+from helper import UsesQApplication
+from PySide2.QtGui import QTextFrame, QTextCursor, QTextCharFormat, QFont, QTextFrameFormat
+from PySide2.QtWidgets import QTextEdit
+
+class BugTest(UsesQApplication):
+    def testCase(self):
+        editor = QTextEdit()
+        cursor = QTextCursor(editor.textCursor())
+        cursor.movePosition(QTextCursor.Start)
+   
+        mainFrame = cursor.currentFrame()
+        
+        plainCharFormat = QTextCharFormat()
+        boldCharFormat = QTextCharFormat()
+        boldCharFormat.setFontWeight(QFont.Bold);
+        cursor.insertText("""
+                          Text documents are represented by the 
+                          QTextDocument class, rather than by QString objects. 
+                          Each QTextDocument object contains information about 
+                          the document's internal representation, its structure, 
+                          and keeps track of modifications to provide undo/redo 
+                          facilities. This approach allows features such as the 
+                          layout management to be delegated to specialized 
+                          classes, but also provides a focus for the framework.""",
+                          plainCharFormat)
+
+        frameFormat = QTextFrameFormat()
+        frameFormat.setMargin(32)
+        frameFormat.setPadding(8)
+        frameFormat.setBorder(4)
+        cursor.insertFrame(frameFormat)
+
+        cursor.insertText("""
+                          Documents are either converted from external sources 
+                          or created from scratch using Qt. The creation process 
+                          can done by an editor widget, such as QTextEdit, or by 
+                          explicit calls to the Scribe API.""",
+                          boldCharFormat)
+
+        cursor = mainFrame.lastCursorPosition()
+        cursor.insertText("""
+                          There are two complementary ways to visualize the 
+                          contents of a document: as a linear buffer that is 
+                          used by editors to modify the contents, and as an 
+                          object hierarchy containing structural information 
+                          that is useful to layout engines. In the hierarchical 
+                          model, the objects generally correspond to visual 
+                          elements such as frames, tables, and lists. At a lower 
+                          level, these elements describe properties such as the 
+                          style of text used and its alignment. The linear 
+                          representation of the document is used for editing and 
+                          manipulation of the document's contents.""",
+                          plainCharFormat)
+
+        
+        frame = cursor.currentFrame()
+
+        items = []
+
+        #test iterator
+        for i in frame:
+            items.append(i)
+
+        #test __iadd__
+        b = frame.begin()
+        i = 0
+        while not b.atEnd():
+            self.assertEqual(b, items[i])
+            self.assertTrue(b.parentFrame(), items[i].parentFrame())
+            b.__iadd__(1)
+            i += 1
+
+        #test __isub__
+        b = frame.end()
+        i = 0
+        while i > 0:
+            self.assertEqual(b, items[i])
+            self.assertTrue(b.parentFrame(), items[i].parentFrame())
+            b.__isub__(1)
+            i -= 1
+
+        
+
+if __name__ == '__main__':
+    unittest.main()