diff options
Diffstat (limited to 'tests/QtCore/qobject_parent_test.py')
-rw-r--r-- | tests/QtCore/qobject_parent_test.py | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/tests/QtCore/qobject_parent_test.py b/tests/QtCore/qobject_parent_test.py new file mode 100644 index 000000000..4699fc60c --- /dev/null +++ b/tests/QtCore/qobject_parent_test.py @@ -0,0 +1,234 @@ + +'''Test cases for parent-child relationship''' + +import unittest +from sys import getrefcount + +from PySide.QtCore import QObject, QTimer + +class ParentRefCountCase(unittest.TestCase): + '''Test case for the refcount changes of setParent''' + + def setUp(self): + #Acquire resources + self.parent = QObject() + self.child = QObject() + + def tearDown(self): + #Release resources + del self.child + del self.parent + + def testSetParent(self): + #QObject.setParent() refcount changes + self.assertEqual(getrefcount(self.child), 2) + self.child.setParent(self.parent) + self.assertEqual(getrefcount(self.child), 3) + + def testConstructor(self): + #QObject(QObject) refcount changes + child = QObject(self.parent) + self.assertEqual(getrefcount(child), 3) + +class ParentCase(unittest.TestCase): + '''Small collection of tests related to parent-child relationship''' + + def testSetParent(self): + #QObject.setParent() + parent = QObject() + child = QObject() + child.setParent(parent) + + self.assertEqual(parent, child.parent()) + + def testParentConstructor(self): + #QObject(parent) + parent = QObject() + child = QObject(parent) + + self.assertEqual(parent, child.parent()) + + orig_repr = repr(child) + del child + self.assertEqual(orig_repr, repr(parent.children()[0])) + + def testChildren(self): + #QObject.children() + parent = QObject() + children = [QObject(parent) for x in range(25)] + + self.assertEqual(parent.children(), children) + + def testFindChild(self): + #QObject.findChild() with all QObject + parent = QObject() + name = 'object%d' + children = [QObject(parent) for i in range(20)] + + for i, child in enumerate(children): + child.setObjectName(name % i) + + for i, child in enumerate(children): + self.assertEqual(child, parent.findChild(QObject, name % i)) + + def testFindChildren(self): + #QObject.findChildren() with all QObject + parent = QObject() + target_name = 'foo' + children = [QTimer(parent) for i in range(20)] + children.extend([QObject(parent) for i in range(20)]) + + for i, child in enumerate(children): + if i % 5 == 0: + child.setObjectName(target_name) + else: + child.setObjectName(str(i)) + + # Emulates findChildren with the intended outcome + target_children = [x for x in children if x.objectName() == target_name] + test_children = parent.findChildren(QObject, target_name) + + self.assertEqual(sorted(target_children), sorted(test_children)) + + def testParentEquality(self): + #QObject.parent() == parent + parent = QObject() + child = QObject(parent) + self.assertEqual(parent, child.parent()) + + +class TestParentOwnership(unittest.TestCase): + '''Test case for Parent/Child object ownership''' + + def testParentDestructor(self): + parent = QObject() + self.assertEqual(getrefcount(parent), 2) + + child = QObject(parent) + self.assertEqual(getrefcount(child), 3) + self.assertEqual(getrefcount(parent), 2) + + del parent + self.assertEqual(getrefcount(child), 2) + + # this will fail because parent deleted child cpp object + self.assertRaises(RuntimeError, lambda :child.objectName()) + + # test parent with multiples children + def testMultipleChildren(self): + o = QObject() + self.assertEqual(getrefcount(o), 2) + + c = QObject(o) + self.assertEqual(getrefcount(c), 3) + self.assertEqual(getrefcount(o), 2) + + c2 = QObject(o) + self.assertEqual(getrefcount(o), 2) + self.assertEqual(getrefcount(c), 3) + self.assertEqual(getrefcount(c2), 3) + + del o + self.assertEqual(getrefcount(c), 2) + self.assertEqual(getrefcount(c2), 2) + + # this will fail because parent deleted child cpp object + self.assertRaises(RuntimeError, lambda :c.objectName()) + self.assertRaises(RuntimeError, lambda :c2.objectName()) + + # test recursive parent + def testRecursiveParent(self): + o = QObject() + self.assertEqual(getrefcount(o), 2) + + c = QObject(o) + self.assertEqual(getrefcount(c), 3) + self.assertEqual(getrefcount(o), 2) + + c2 = QObject(c) + self.assertEqual(getrefcount(o), 2) + self.assertEqual(getrefcount(c), 3) + self.assertEqual(getrefcount(c2), 3) + + del o + self.assertEqual(getrefcount(c), 2) + self.assertEqual(getrefcount(c2), 2) + + # this will fail because parent deleted child cpp object + self.assertRaises(RuntimeError, lambda :c.objectName()) + self.assertRaises(RuntimeError, lambda :c2.objectName()) + + # test parent transfer + def testParentTransfer(self): + o = QObject() + self.assertEqual(getrefcount(o), 2) + + c = QObject() + self.assertEqual(getrefcount(c), 2) + + c.setParent(o) + self.assertEqual(getrefcount(c), 3) + + c.setParent(None) + self.assertEqual(getrefcount(c), 2) + + del c + del o + + +class ExtQObject(QObject): + def __init__(self): + QObject.__init__(self) + +class ReparentingTest(unittest.TestCase): + '''Test cases for reparenting''' + + def testParentedQObjectIdentity(self): + object_list = [] + parent = QObject() + for i in range(3): + obj = QObject() + object_list.append(obj) + obj.setParent(parent) + for child in parent.children(): + self.assert_(child in object_list) + + def testParentedExtQObjectType(self): + object_list = [] + parent = QObject() + for i in range(3): + obj = ExtQObject() + object_list.append(obj) + obj.setParent(parent) + for orig, child in zip(object_list, parent.children()): + self.assertEqual(type(orig), type(child)) + + def testReparentedQObjectIdentity(self): + object_list = [] + old_parent = QObject() + new_parent = QObject() + for i in range(3): + obj = QObject() + object_list.append(obj) + obj.setParent(old_parent) + for obj in object_list: + obj.setParent(new_parent) + for child in new_parent.children(): + self.assert_(child in object_list) + + def testReparentedExtQObjectType(self): + object_list = [] + old_parent = QObject() + new_parent = QObject() + for i in range(3): + obj = ExtQObject() + object_list.append(obj) + obj.setParent(old_parent) + for obj in object_list: + obj.setParent(new_parent) + for orig, child in zip(object_list, new_parent.children()): + self.assertEqual(type(orig), type(child)) + + +if __name__ == '__main__': + unittest.main() |