'Test __iter__ without a description.'

@pytest.mark.parametrize('valid_values', [['foo', 'bar'], [('foo', 'foo    desc'), ('bar', 'bar    desc')], [('foo', 'foo    desc'), 'bar']])
def test_iter_without_desc(self, klass, valid_values):

    vv = klass(*valid_values)
    assert (list(vv) == ['foo', 'bar'])
