def testReparent(self):
doc = Document()
n1 = Element(doc, "n1")
n2 = Element(n1, "n2")
n3 = Element(n2, "n3")
self.assertEqual(getChildNames(doc), ["n1"])
self.assertEqual(getChildNames(n1), ["n2"])
self.assertEqual(getChildNames(n2), ["n3"])
self.assertEqual(getChildNames(n3), [])
self.assertTrue(n3.canReparent(n1))
n3.reparent(n1)
self.assertEqual(getChildNames(doc), ["n1"])
self.assertEqual(getChildNames(n1), ["n2", "n3"])
self.assertEqual(getChildNames(n2), [])
self.assertEqual(getChildNames(n3), [])
# Special case 1: move last
self.assertTrue(n2.canReparent(n1))
n2.reparent(n1)
self.assertEqual(getChildNames(n1), ["n3", "n2"])
# Special case 2: append root element again (= do nothing, or move last in case of comments)
self.assertTrue(n1.canReparent(doc))
n1.reparent(doc)
self.assertEqual(getChildNames(doc), ["n1"])
def testReparentCycle(self):
doc = Document()
n1 = Element(doc, "foo")
n2 = Element(n1, "bar")
self.assertFalse(n2.canReparent(n2))
with self.assertRaises(ChildCycleError):
n2.reparent(n2)
self.assertFalse(n1.canReparent(n2))
with self.assertRaises(ChildCycleError):
n1.reparent(n2)
def testWrongDocumentError(self):
doc1 = Document()
n1 = Element(doc1, "n1")
doc2 = Document()
n2 = Element(doc2, "n2")
self.assertFalse(n2.canReparent(n1))
with self.assertRaises(WrongDocumentError):
n2.reparent(n1)
def testReparentRootElement(self):
doc = Document()
n1 = Element(doc, "foo")
n2 = Element(n1, "bar")
self.assertEqual(doc.rootElement, n1)
self.assertFalse(n2.canReparent(doc))
with self.assertRaises(SecondRootElementError):
n2.reparent(doc)