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Pin: a tail on a payload with unread slots is refused before any slot is marked or the record held
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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Libby 2026-11-12 05:06:33 +00:00
commit 34d85b2b59
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21
packages/cultcache-ts/test/union-parity.test.ts
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@ -793,6 +793,27 @@ test("every bytes-after vector is refused by the one owner, by count, on the cod
}
});
test("a payload with an unread slot and a tail is refused by count before any slot is marked or the record held", async () => {
const withSlot = await read("extra-slot-record.msgpack");
const surface = surfaceDocument();
const tailed = Uint8Array.from([...withSlot, 0xc0]);
const whole = CultCache.builder().withDocumentType(surface).withGenericStore(memoryStore([envelopeOf(withSlot)])).build();
await whole.pullAllBackingStores();
assert.ok(whole.unreadSlots(surface, "surface"), "without a tail the record is held with its unread slots");
const loading = CultCache.builder().withDocumentType(surface).withGenericStore(memoryStore([envelopeOf(tailed)])).build();
await assertBytesAfterRefused("extra-slot-record+tail", 1, () => loading.pullAllBackingStores(), surface.type);
assert.equal(loading.get(surface, "surface"), undefined);
assert.equal(loading.unreadSlots(surface, "surface"), undefined);
const written: CultCacheEnvelope[] = [];
const putting = CultCache.builder().withDocumentType(surface).withGenericStore(memoryStore(written)).build();
await assertBytesAfterRefused("extra-slot-record+tail", 1, () => putting.putEnvelope(surface, envelopeOf(tailed)), surface.type);
assert.equal(written.length, 0);
assert.equal(putting.get(surface, "surface"), undefined);
assert.equal(putting.unreadSlots(surface, "surface"), undefined);
});
test("a payload that ends early is not bytes after its value: the decoder refuses it, and a user formatter's bytes are not walked", async () => {
const whole = await read("union-surface.msgpack");
const surface = surfaceDocument();