def test_tag_node(self):
"""
Tests the TagNode class.
"""
root = RootNode()
node = TagNode("tagname", {"a": "b", "c": "d"})
self.assertFalse(node.closed)
self.assertFalse(node.serialized)
root.add_child(node)
self.assertEqual(root.node_count, 1)
self.assertEqual(root.closed_node_count, 0)
self.assertFalse(node.closed)
self.assertFalse(node.serialized)
valid_strings = ("<tagname a=\"b\" c=\"d\">",
"<tagname c=\"d\" a=\"b\">")
self.assertIn(node.start_to_string(), valid_strings)
self.assertEqual(node.end_to_string(), "</tagname>")
self.assertEqual(node.children_to_string(), "")
self.assertIn(node.to_string(), [v + "</tagname>" for v in
valid_strings])
node.add_child(EntityrefNode("amp"))
self.assertEqual(root.node_count, 2)
self.assertEqual(root.closed_node_count, 1)
self.assertFalse(node.closed)
self.assertFalse(node.serialized)
self.assertIn(node.start_to_string(), valid_strings)
self.assertEqual(node.end_to_string(), "</tagname>")
self.assertEqual(node.children_to_string(), "&")
self.assertIn(node.to_string(), [v + "&</tagname>" for v in
valid_strings])
node.close()
self.assertEqual(root.node_count, 2)
self.assertEqual(root.closed_node_count, 2)
self.assertTrue(node.closed)
self.assertFalse(node.serialized)
self.assertIn(node.start_to_string(), valid_strings)
self.assertEqual(node.end_to_string(), "</tagname>")
self.assertEqual(node.children_to_string(), "&")
self.assertIn(node.to_string(), [v + "&</tagname>" for v in
valid_strings])
node.serialized = True
self.assertTrue(node.serialized)
