import unittest

from validation import validate_uid_mapping


class UidMappingTest(unittest.TestCase):
    def test_ambiguous_mapping_requires_ids(self) -> None:
        events = [
            {"title": "Event A"},
            {"title": "Event B"},
        ]

        with self.assertRaises(ValueError) as ctx:
            validate_uid_mapping(events, {"Event A"}, {2})

        message = str(ctx.exception)
        self.assertIn("Ambivalent UID-mapping", message)
        self.assertIn("events[].id", message)

    def test_ambiguous_mapping_with_ids_returns_false(self) -> None:
        events = [
            {"id": "log_01", "title": "Event A"},
            {"id": "log_02", "title": "Event B"},
        ]

        allow = validate_uid_mapping(events, {"Event A"}, {2})
        self.assertFalse(allow)