def test_dulwich_tag(self):
"""
Tests method Sartoris::_dulwich_tag
1. Call _dulwich_tag
2. Check most recent tag to verify tag exists
"""
s = Sartoris()
tag = 'test_tag'
s._dulwich_tag(tag, s._make_author())
tags = s._dulwich_get_tags()
assert tags.keys()[0] == tag
