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Python: pin what the unreadable-format and extra-slot refusals say and what the runtime reads

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Mutation survivors on the merge's refusal text (the two readable formats, the
unrecognised-header description, the record-slot refusal) had no test pinning them.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-02 20:02:15 +02:00
commit 0bd1bac963
1 changed files with 24 additions and 0 deletions
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24
packages/cultcache-py/tests/test_cultcache.py
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@ -1373,6 +1373,30 @@ class CultCacheTests(unittest.TestCase):
self.assertNotIn(repr(value[0]), message)
self.assertIn(f"of {len(value[0])} bytes", message)
def test_single_file_refusals_say_exactly_what_was_found_and_what_is_read(self) -> None:
import msgpack # type: ignore
with tempfile.TemporaryDirectory() as tmp:
path = Path(tmp) / "store.cc"
reads = "it reads 'cultcache.store.v1' and 'cultcache.store.v3' only"
for header, found in (
("cultcache.store.v12", "'cultcache.store.v12'"),
("cultcache.store.SECRET", "an unrecognised cultcache.store.* header of 22 bytes"),
("cultcache.store.v", "an unrecognised cultcache.store.* header of 17 bytes"),
):
path.write_bytes(msgpack.packb([header, [], []], use_bin_type=True))
with self.assertRaises(ValueError) as caught:
SingleFileMessagePackBackingStore(path).pull_all()
self.assertIn(f"CultCache store format {found} is not one this runtime reads; {reads}", str(caught.exception))
path.write_bytes(msgpack.packb(["cultcache.store.v1", [], [["k", "s", "t", b"", "extra"]]], use_bin_type=True))
with self.assertRaises(ValueError) as caught:
SingleFileMessagePackBackingStore(path).pull_all()
self.assertIn(
"CultCache record 'k' (schema 's') has 5 slots, more than the 4 of a cultcache.store.v1 record, so this is not a valid store",
str(caught.exception),
)
def test_single_file_record_refusal_names_only_a_string_key(self) -> None:
import msgpack # type: ignore