from bexproof.privacy import privacy_aggregate


def test_privacy_aggregate_basic():
    values = [1.0, 2.0, 3.0, 4.0]
    result = privacy_aggregate(values, epsilon=1.0)
    # result should be within a plausible range around the true sum (10.0)
    assert isinstance(result, float)
    assert abs(result - 10.0) < 5.0  # allow some noise margin in MVP