import { describe, expect, it } from "vitest";

import {
  digestModelSourceBytes,
  digestModelSourceBytesAsync,
} from "./model-source-digest";

describe("model source digest", () => {
  it("uses asynchronous WebCrypto without changing canonical SHA-256 identity", async () => {
    const bytes = new TextEncoder().encode("toolcraft model source");

    await expect(digestModelSourceBytesAsync(bytes)).resolves.toBe(
      digestModelSourceBytes(bytes),
    );
  });

  it("hashes only the selected typed-array window", async () => {
    const storage = new Uint8Array([9, 1, 2, 3, 9]);
    const window = storage.subarray(1, 4);

    await expect(digestModelSourceBytesAsync(window)).resolves.toBe(
      digestModelSourceBytes(new Uint8Array([1, 2, 3])),
    );
  });
});