def test_attr_deletion():
t = Tag('<t n1=v1 n1=v333 n2=v22>c</t>')
t.del_attr('n1')
assert t.string == '<t n2=v22>c</t>'
def test_attr_deletion(self):
t = Tag('<t n1=v1 n1=v333 n2=v22>c</t>')
t.del_attr('n1')
self.assertEqual(t.string, '<t n2=v22>c</t>')