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Diffstat (limited to 'tests/QtGui/keep_reference_test.py')
-rwxr-xr-x | tests/QtGui/keep_reference_test.py | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/tests/QtGui/keep_reference_test.py b/tests/QtGui/keep_reference_test.py new file mode 100755 index 000000000..d0962d5df --- /dev/null +++ b/tests/QtGui/keep_reference_test.py @@ -0,0 +1,75 @@ +#!/usr/bin/env python + +import unittest + +from sys import getrefcount +from helper import UsesQApplication +from PySide.QtCore import QAbstractTableModel, QVariant +from PySide.QtGui import QTableView + +class TestModel(QAbstractTableModel): + def __init__(self, parent=None): + QAbstractTableModel.__init__(self, parent) + def rowCount(self, parent): + return 0 + def columnCount(self, parent): + return 0 + def data(self, index, role): + return QVariant() + +class KeepReferenceTest(UsesQApplication): + + def testModelWithoutParent(self): + view = QTableView() + model = TestModel() + view.setModel(model) + samemodel = view.model() + self.assertEqual(model, samemodel) + + def testModelWithParent(self): + view = QTableView() + model = TestModel(self.app) + view.setModel(model) + samemodel = view.model() + self.assertEqual(model, samemodel) + + def testReferenceCounting(self): + '''Tests reference count of model object referred by view objects.''' + model1 = TestModel() + refcount1 = getrefcount(model1) + view1 = QTableView() + view1.setModel(model1) + self.assertEqual(getrefcount(view1.model()), refcount1 + 1) + + view2 = QTableView() + view2.setModel(model1) + self.assertEqual(getrefcount(view2.model()), refcount1 + 2) + + model2 = TestModel() + view2.setModel(model2) + self.assertEqual(getrefcount(view1.model()), refcount1 + 1) + + def testReferenceCountingWhenDeletingReferrer(self): + '''Tests reference count of model object referred by deceased view object.''' + model = TestModel() + refcount1 = getrefcount(model) + view = QTableView() + view.setModel(model) + self.assertEqual(getrefcount(view.model()), refcount1 + 1) + + del view + self.assertEqual(getrefcount(model), refcount1) + + def testReferreedObjectSurvivalAfterContextEnd(self): + '''Model object assigned to a view object must survive after getting out of context.''' + def createModelAndSetToView(view): + model = TestModel() + model.setObjectName('created model') + view.setModel(model) + view = QTableView() + createModelAndSetToView(view) + model = view.model() + +if __name__ == '__main__': + unittest.main() + |