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

import { autoRun, manage } from "../src/index.js";

describe("set", () => {
  test("autoRun", () => {
    class A {
      public s = new Set<number>();
    }
    const a = new A();
    const ma = manage(a);
    ma.s.add(1);
    let count = 0;
    const runner = autoRun(() => {
      expect(ma.s.has(1)).toBeDefined();
      count += 1;
    });
    runner.start();
    ma.s.delete(1);
    expect(count).toBe(2);
  });

  test("autoRun-unchanged", () => {
    class A {
      public s = new Set<number>();
    }
    const a = new A();
    const ma = manage(a);
    ma.s.add(1);
    let count = 0;
    const runner = autoRun(() => {
      expect(ma.s.has(1)).toBeDefined();
      count += 1;
    });
    runner.start();
    ma.s.add(1);
    ma.s.add(2);
    ma.s.delete(2);
    expect(count).toBe(1);
  });

  test("autoRun-size", () => {
    class A {
      public s = new Set<number>();
    }
    const a = new A();
    const ma = manage(a);
    ma.s.add(1);
    let count = 0;
    const runner = autoRun(() => {
      expect(ma.s.size).toBeDefined();
      count += 1;
    });
    runner.start(); // count = 1
    ma.s.add(1); // doesn't change size
    ma.s.add(2); // increase size
    ma.s.add(2); // doesn't change size
    ma.s.add(3); // increase size
    ma.s.delete(2); // decrease size
    expect(count).toBe(4);
  });
});