import unittest
from cosmosmesh_privacy_preserving_federated_ import PlanDeltaCRDT


class TestPlanDeltaCRDT(unittest.TestCase):
    def test_merge_numeric_max(self):
        a = PlanDeltaCRDT(delta_id="d1", changes={"x": 1}, ts=1, actor="A", version_vector={"A": 1})
        b = PlanDeltaCRDT(delta_id="d2", changes={"x": 3}, ts=2, actor="B", version_vector={"B": 2})
        merged = a.merge(b)
        self.assertEqual(merged.changes["x"], 3)
        self.assertEqual(merged.ts, 2)
        self.assertEqual(merged.version_vector.get("A"), 1)
        self.assertEqual(merged.version_vector.get("B"), 2)

    def test_merge_non_numeric_prefers_later_timestamp(self):
        a = PlanDeltaCRDT(delta_id="d1", changes={"flag": True}, ts=1, actor="A", version_vector={"A": 1})
        b = PlanDeltaCRDT(delta_id="d2", changes={"flag": False}, ts=2, actor="B", version_vector={"B": 2})
        merged = a.merge(b)
        self.assertIs(merged.changes["flag"], False)
        self.assertEqual(merged.ts, 2)
        self.assertEqual(merged.version_vector.get("A"), 1)
        self.assertEqual(merged.version_vector.get("B"), 2)


if __name__ == "__main__":
    unittest.main()