import { expect } from "chai";
import Pool from "./Pool";

describe("Pool", () => {
  it("should work with multiple calls", async () => {
    const pool = new Pool();
    // Add names for debugging,
    const a = { name: "a" };
    const b = { name: "b" };
    const c = { name: "c" };
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    pool.registerNewItem(a);
    expect(pool.getAvailable()).to.equal(a);
    expect(pool.getAvailable()).to.equal(a);
    expect(pool.getAvailable()).to.equal(a);
    pool.makeUnavailable(a);
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    pool.makeUnavailable(a);
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    pool.makeUnavailable(a);
    expect(pool.getAvailable()).to.equal(undefined);
    pool.makeAvailable(a);
    expect(pool.getAvailable()).to.equal(a);
    expect(pool.getAvailable()).to.equal(a);
    pool.makeAvailable(a);
    expect(pool.getAvailable()).to.equal(a);
    expect(pool.getAvailable()).to.equal(a);
    pool.makeUnavailable(a);
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    pool.makeUnavailable(a);
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    pool.registerNewItem(b);
    expect(pool.getAvailable()).to.equal(b);
    expect(pool.getAvailable()).to.equal(b);
    pool.makeAvailable(a);
    expect(pool.getAvailable()).to.equal(b);
    expect(pool.getAvailable()).to.equal(b);
    expect(pool.getAvailable()).to.equal(b);
    pool.makeUnavailable(a);
    expect(pool.getAvailable()).to.equal(b);
    expect(pool.getAvailable()).to.equal(b);
    expect(pool.getAvailable()).to.equal(b);
    pool.deregisterItem(b);
    expect(pool.getAvailable()).to.equal(undefined);
    expect(pool.getAvailable()).to.equal(undefined);
    pool.makeAvailable(a);
    expect(pool.getAvailable()).to.equal(a);
    expect(pool.getAvailable()).to.equal(a);
    pool.registerNewItem(c);
    pool.registerNewItem(b);
    pool.deregisterItem(a);
    pool.registerNewItem(a);
    expect(pool.getAvailable()).to.equal(c);
    expect(pool.getAvailable()).to.equal(c);
    pool.makeUnavailable(b);
    expect(pool.getAvailable()).to.equal(c);
    pool.makeUnavailable(c);
    expect(pool.getAvailable()).to.equal(a);
    pool.makeAvailable(a);
    expect(pool.getAvailable()).to.equal(a);
    expect(pool.getAvailable()).to.equal(a);
    pool.makeAvailable(c);
    expect(pool.getAvailable()).to.equal(a);
    pool.makeUnavailable(a);
    pool.makeAvailable(b);
    expect(pool.getAvailable()).to.equal(c);
    expect(pool.getAvailable()).to.equal(c);
    pool.makeUnavailable(c);
    expect(pool.getAvailable()).to.equal(b);
    expect(pool.getAvailable()).to.equal(b);
    expect(pool.getAvailable()).to.equal(b);
  });
});