def test_tag_exists_fails(self):
        self.repo.create_tag('0.3.0')
        self.assertRaises(
            TagExists,
            self.calculate_base_branch, '0.3.0')
Trying to create a release when a tag already exists for the given
dataset/ETHPy150Open ClusterHQ/flocker/admin/test/test_release.py/CalculateBaseBranchTests.test_tag_exists_fails