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cultcache-ts test: the deep codec document uses a slot codec that writes N nested arrays (a self-recursive list codec has no finite type name)

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Meta Vens 2026-10-12 01:11:18 +02:00
commit 542a3d904e
1 changed files with 9 additions and 5 deletions
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14
packages/cultcache-ts/test/payload-depth.test.ts
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@ -248,16 +248,20 @@ test("a user formatter's bytes are its own: a 0x91 grey image round-trips, while
assert.throws(() => encodeDocumentPayload(anything, nest(L + 1)), CultCachePayloadDepthError);
assert.throws(() => decodeDocumentPayload(anything, documentPayloadFromBytes(arrays(L + 1))), CultCachePayloadDepthError);
type Tree = unknown[];
const tree: codecs.Codec<Tree> = codecs.lazy(() => codecs.list(tree));
// A slot that writes `depth` nested arrays, so a codec document can be made as deep as the test needs.
const nested: codecs.Codec<number> = {
typeName: "System.Object",
encode: (depth) => nest(depth),
decode: (raw) => (raw as unknown[]).length,
};
const coded = defineDocumentType({
type: "t.coded",
schemaId: "t.coded.v0",
schema: z.any(),
name: "id",
codec: codecs.slots<{ id: string; inner: Tree }>({ 0: ["id", codecs.string], 1: ["inner", tree] }, "T.Coded"),
codec: codecs.slots<{ id: string; depth: number }>({ 0: ["id", codecs.string], 1: ["depth", nested] }, "T.Coded"),
});
assert.doesNotThrow(() => encodeDocumentPayload(coded, { id: "a", inner: nest(L - 1) as Tree }));
assert.throws(() => encodeDocumentPayload(coded, { id: "a", inner: nest(L) as Tree }), CultCachePayloadDepthError);
assert.doesNotThrow(() => encodeDocumentPayload(coded, { id: "a", depth: L - 1 }));
assert.throws(() => encodeDocumentPayload(coded, { id: "a", depth: L }), CultCachePayloadDepthError);
assert.throws(() => decodeDocumentPayload(coded, documentPayloadFromBytes(arrays(L + 1))), CultCachePayloadDepthError);
});