def test_empty_set(self):
        s = ast.LiteralSet([])
        c, r = optimizer.optimization_pass(s)
        assert c == 1
        assert isinstance(r, ast.Empty)
Should have the value found in the roles default attributes
dataset/ETHPy150Open armon/pypred/tests/unit/test_optimizer.py/TestOptimizer.test_empty_set--crossover with--dataset/ETHPy150Open tobami/littlechef/tests/test_lib.py/TestChef.test_attribute_merge_role_default