type MemoryMultimodalSettings,

} from "./multimodal.js";

type FileEntry = NonNullable<Awaited<ReturnType<typeof buildFileEntry>>>;

let sharedTempRoot = "";

let sharedTempId = 0;

return () => tmpDir;

}

function expectFileEntry(entry: Awaited<ReturnType<typeof buildFileEntry>>): FileEntry {

if (!entry) {

throw new Error("Expected file entry to be built");

}

return entry;

}

const multimodal: MemoryMultimodalSettings = {

enabled: true,

modalities: ["image", "audio"],

const imagePath = path.join(tmpDir, "diagram.png");

fsSync.writeFileSync(imagePath, Buffer.from("png"));

const entry = await buildFileEntry(imagePath, tmpDir, multimodal);

const built = await buildMultimodalChunkForIndexing(entry!);

const entry = expectFileEntry(await buildFileEntry(imagePath, tmpDir, multimodal));

const built = await buildMultimodalChunkForIndexing(entry);

expect(built?.chunk.embeddingInput?.parts).toEqual([

{ type: "text", text: "Image file: diagram.png" },

expect.objectContaining({ type: "inline-data", mimeType: "image/png" }),

]);

fsSync.writeFileSync(imagePath, Buffer.alloc(entry!.size + 32, 1));

await expect(buildMultimodalChunkForIndexing(entry!)).resolves.toBeNull();

fsSync.writeFileSync(imagePath, Buffer.alloc(entry.size + 32, 1));

await expect(buildMultimodalChunkForIndexing(entry)).resolves.toBeNull();

});

it("chunks mixed text and preserves surrogate pairs", () => {