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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 Qt for Python.
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## GNU General Public License Usage
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## General Public License version 3 as published by the Free Software
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import unittest

import sys
from PySide2 import QtWidgets, QtCore
from helper import UsesQApplication

class QListWidgetTest(UsesQApplication):

    def populateList(self, lst):
        o = QtCore.QObject()
        o.setObjectName("obj")

        item = QtWidgets.QListWidgetItem("item0")
        item.setData(QtCore.Qt.UserRole, o)
        #item._data = o
        self.assertTrue(sys.getrefcount(o), 3)
        self.assertTrue(sys.getrefcount(item), 2)
        lst.addItem(item)
        self.assertTrue(sys.getrefcount(item), 3)

    def checkCurrentItem(self, lst):
        item = lst.currentItem()
        self.assertTrue(sys.getrefcount(item), 3)

    def checkItemData(self, lst):
        item = lst.currentItem()
        o = item.data(QtCore.Qt.UserRole)
        self.assertTrue(sys.getrefcount(o), 4)
        self.assertEqual(o, item._data)
        self.assertTrue(sys.getrefcount(o), 2)

    def testConstructorWithParent(self):
        lst = QtWidgets.QListWidget()
        self.populateList(lst)
        self.checkCurrentItem(lst)
        i = lst.item(0)
        self.assertTrue(sys.getrefcount(i), 3)

        del lst
        self.assertTrue(sys.getrefcount(i), 2)
        del i

    def testIt(self):
        lst = QtWidgets.QListWidget()
        lst.show()
        slot = lambda : lst.removeItemWidget(lst.currentItem())
        lst.addItem(QtWidgets.QListWidgetItem("foo"))
        QtCore.QTimer.singleShot(0, slot)
        QtCore.QTimer.singleShot(0, lst.close)
        self.app.exec_()
        self.assertEqual(lst.count(), 1)

    def testClear(self):
        lst = QtWidgets.QListWidget()
        lst.addItem("foo")
        item = lst.item(0)
        self.assertIsNone(lst.clear())
        self.assertRaises(RuntimeError, lambda: item.text())

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