def test_bump(self, current, bump_part, expected, stages):
with mock_patch.object(Version, "stages", stages):
version = Version(current)
new_version = version.bump(bump_part)
assert new_version == Version(expected)
assert new_version is not version
def test_invalid_bump(self, current, bump_part, message, stages):
with mock_patch.object(Version, "stages", stages):
with pytest.raises(ValueError, match=message):
version = Version(current)
version.bump(bump_part)