import { beforeAll, describe, expect, it } from "vitest";
import {
    chunkHashFinal,
    chunkHashInit,
    chunkHashUpdate,
    init,
} from "../../src/crypto/index.js";

beforeAll(async () => {
    await init();
});

describe("content hash", () => {
    // RFC 7693 Appendix A: BLAKE2b-512 of "abc".
    const abc = Buffer.from(
        "ba80a53f981c4d0d6a2797b69f12f6e94c212f14685ac4b74b12bb6fdbffa2d1" +
            "7d87c5392aab792dc252d5de4533cc9518d38aa8dbf1925ab92386edd4009923",
        "hex",
    ).toString("base64");

    it("is unkeyed BLAKE2b-512 in standard base64", () => {
        const state = chunkHashInit();
        chunkHashUpdate(state, new TextEncoder().encode("abc"));
        expect(chunkHashFinal(state)).toBe(abc);
    });

    it("gives the same hash when the input arrives in chunks", () => {
        const state = chunkHashInit();
        chunkHashUpdate(state, new TextEncoder().encode("a"));
        chunkHashUpdate(state, new TextEncoder().encode("bc"));
        expect(chunkHashFinal(state)).toBe(abc);
    });
});