def testRootElement(self):
doc = Document()
self.assertIsNone(doc.rootElement)
n1 = Element(doc, "n1")
self.assertEqual(doc.rootElement, n1)
n2 = Element(n1, "n2")
n2.replace(doc.rootElement)
self.assertEqual(doc.rootElement, n2)
self.assertFalse(n1.isAlive())
self.assertTrue(n2.isAlive())
def testReplaceExceptions(self):
doc = Document()
root = Element(doc, "root")
n1 = Element(root, "n1")
doc2 = Document()
root2 = Element(doc2, "root2")
self.assertFalse(n1.canReplace(doc))
with self.assertRaises(ReplaceDocumentError):
n1.replace(doc)
self.assertFalse(doc.canReplace(doc2))
with self.assertRaises(ReplaceDocumentError):
doc.replace(doc2)
self.assertFalse(root.canReplace(root2))
with self.assertRaises(WrongDocumentError):
root.replace(root2)
self.assertFalse(doc.canReplace(n1))
with self.assertRaises(WrongChildTypeError):
doc.replace(n1)
# XXX Once NodeType::Comment is implemented, uncomment the following test.
# until then, replace() can never raise SecondRootElementError
# c1 = Comment(doc, "comment")
# self.assertFalse(n1.canReplace(c1))
# with self.assertRaises(SecondRootElementError):
# n1.replace(c1)
self.assertFalse(root.canReplace(n1))
with self.assertRaises(ChildCycleError):
root.replace(n1)
def testReplace(self):
doc = Document()
root = Element(doc, "root")
n1 = Element(root, "n1")
n2 = Element(root, "n2")
n3 = Element(root, "n3")
n4 = Element(root, "n4")
n21 = Element(n2, "n21")
n22 = Element(n2, "n22")
n23 = Element(n2, "n23")
n31 = Element(n3, "n31")
n211 = Element(n21, "n211")
n212 = Element(n21, "n212")
self.assertTrue(n21.canReplace(n3))
n21.replace(n3)
self.assertEqual(getChildNames(root), ["n1", "n2", "n21", "n4"])
self.assertEqual(getChildNames(n2), ["n22", "n23"])
self.assertTrue(n21.isAlive())
self.assertFalse(n3.isAlive())
self.assertFalse(n31.isAlive())
self.assertTrue(n2.canReplace(n2))
n2.replace(n2)
self.assertEqual(getChildNames(root), ["n1", "n2", "n21", "n4"])
self.assertEqual(getChildNames(n2), ["n22", "n23"])
self.assertTrue(n22.canReplace(n2))
n22.replace(n2)
self.assertEqual(getChildNames(root), ["n1", "n22", "n21", "n4"])
self.assertTrue(n22.isAlive())
self.assertFalse(n2.isAlive())
self.assertFalse(n23.isAlive())
self.assertTrue(n21.canReplace(n1))
n21.replace(n1)
self.assertEqual(getChildNames(root), ["n21", "n22", "n4"])
self.assertTrue(n21.isAlive())
self.assertFalse(n1.isAlive())
self.assertTrue(n22.canReplace(n4))
n22.replace(n4)
self.assertEqual(getChildNames(root), ["n21", "n22"])
self.assertTrue(n22.isAlive())
self.assertFalse(n4.isAlive())
self.assertTrue(root.canReplace(root))
root.replace(root)
self.assertEqual(getChildNames(doc), ["root"])
self.assertEqual(getChildNames(root), ["n21", "n22"])
self.assertTrue(root.isAlive())
self.assertTrue(n21.canReplace(root))
n21.replace(root)
self.assertEqual(getChildNames(doc), ["n21"])
self.assertEqual(getChildNames(n21), ["n211", "n212"])
self.assertTrue(n21.isAlive())
self.assertFalse(root.isAlive())
self.assertFalse(n22.isAlive())
self.assertTrue(doc.canReplace(doc))
doc.replace(doc)
self.assertTrue(doc.isAlive())
self.assertEqual(getChildNames(doc), ["n21"])
self.assertTrue(n21.isAlive())
