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import gc
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.QtWidgets import (QApplication, QComboBox, QGraphicsScene,
    QGraphicsRectItem)

from helper.usesqapplication import UsesQApplication


class MyDiagram(QGraphicsScene):
    pass


class MyItem(QGraphicsRectItem):
    def itemChange(self, change, value):
        return value


class Sequence(object):
    # Having the __getitem__ method on a class transform the Python
    # type to a PySequence.
    # Before the patch: aa75437f9119d997dd290471ac3e2cc88ca88bf1
    # "Fix QVariant conversions when using PySequences"
    # one could not use an object from this class, because internally
    # we were requiring that the PySequence was finite.
    def __getitem__(self, key):
        raise IndexError()


class QGraphicsSceneOnQVariantTest(UsesQApplication):
    """Test storage ot QGraphicsScene into QVariants"""
    def setUp(self):
        super(QGraphicsSceneOnQVariantTest, self).setUp()
        self.s = MyDiagram()
        self.i = MyItem()
        self.combo = QComboBox()

    def tearDown(self):
        del self.s
        del self.i
        del self.combo
        # PYSIDE-535: Need to collect garbage in PyPy to trigger deletion
        gc.collect()
        super(QGraphicsSceneOnQVariantTest, self).tearDown()

    def testIt(self):
        self.s.addItem(self.i)
        self.assertEqual(len(self.s.items()), 1)

    def testSequence(self):
        # PYSIDE-641
        self.combo.addItem("test", userData=Sequence())
        self.assertTrue(isinstance(self.combo.itemData(0), Sequence))


if __name__ == '__main__':
    unittest.main()
