import json
from citygrid import LocalProblem, SharedVariables


def test_local_problem_serializable():
    lp = LocalProblem(id="lp-1", domain="electricity", assets=["DER-1"], objective={"minimize": ["loss"]}, constraints={"voltage": {"min": 0.95}})
    s = json.dumps(lp.__dict__)
    assert 'lp-1' in s