import { describe, it, expect, beforeEach } from "vitest";
import { parseHash, toHash, setState, getState } from "../src/state/hash.js";

describe("state/hash", () => {
  beforeEach(() => {
    // Reset hash between tests
    window.location.hash = "";
  });

  it("parses page and per from hash", () => {
    const s = "page=3&per=50";
    expect(parseHash(s)).toEqual({ page: 3, per: 50 });
  });

  it("serializes state to query string", () => {
    expect(toHash({ page: 2, per: 25 })).toBe("page=2&per=25");
    expect(toHash({ page: 2 })).toBe("page=2");
    expect(toHash({ per: 10 })).toBe("per=10");
    expect(toHash({})).toBe("");
  });

  it("setState writes to location.hash and clamps values", () => {
    setState({ page: 0, per: 50000 });
    const s = getState();
    expect(s.page).toBe(1);
    expect(s.per).toBe(1000);
  });
});