def test_form(self):
node = Node(name='foo')
self.assertIsInstance(node.form(), NodeForm)
def test_has_children(self):
node = Node(name='foo')
node.save()
document = Document.objects.create(name='bar.txt', parent=node)
self.assertTrue(node.has_children)
self.assertFalse(document.has_children)
