def test_solver_constrained_unsatisfiable():
domain = SignDomain(["a", "b", "c"])
state = SignAbstractState({
"a": Sign.Positive,
"b": Sign.Negative,
"c": Sign.Bottom
})
solution = domain.model(domain.gamma_hat(state))
assert solution is None
def test_solver_constrained_satisfiable():
domain = SignDomain(["a", "b", "c"])
state = SignAbstractState({
"a": Sign.Positive,
"b": Sign.Negative,
"c": Sign.Positive
})
solution = domain.model(domain.gamma_hat(state))
assert solution is not None
assert solution.value_of("a") > 0
assert solution.value_of("b") < 0
assert solution.value_of("c") > 0