import { describe, expect, it } from "vitest";
import { computeRawHash, computeShipmentsHash, md5 } from "@/utils/hash";
import { toShanghaiDateString, round4 } from "@/utils/dates";

describe("hash/dates", () => {
  it("md5 lowercase hex", () => {
    expect(md5("abc")).toBe("900150983cd24fb0d6963f7d28e17f72");
  });
  it("shipments hash stable", () => {
    expect(computeShipmentsHash("MATU2745683", [2, 1])).toBe(
      computeShipmentsHash("MATU2745683", [1, 2]),
    );
  });
  it("raw hash differs", () => {
    expect(
      computeRawHash({ subject: "a", from: "b", date: "c", filenames: [] }),
    ).not.toBe(
      computeRawHash({ subject: "x", from: "b", date: "c", filenames: [] }),
    );
  });
  it("shanghai date boundary", () => {
    const d = new Date("2026-07-12T16:30:00.000Z"); // UTC+8 next day morning
    expect(toShanghaiDateString(d)).toBe("2026-07-13");
  });
  it("round4", () => {
    expect(round4(0.12345)).toBe(0.1235);
  });
});