/**
 * @file toast.test.ts
 * @description The toast queue: at most four on screen, and an error — which
 * stays until dismissed — is never the one pushed out by newer toasts.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

import { describe, it, expect, afterEach } from "vitest";
import { toast, subscribeToasts, dismissToast, type ToastItem } from "../toast";

let current: ToastItem[] = [];
const unsubscribe = subscribeToasts((items) => (current = items));

afterEach(() => {
  for (const t of current) dismissToast(t.id);
});

describe("toast queue", () => {
  it("keeps an unread error when newer toasts overflow the queue", () => {
    toast.error("save failed");
    for (let i = 0; i < 5; i++) toast.success(`copied ${i}`);
    expect(current).toHaveLength(4);
    expect(current.map((t) => t.message)).toContain("save failed");
    expect(current[current.length - 1]?.message).toBe("copied 4");
  });

  it("still shows the newest toast when only errors are queued", () => {
    for (let i = 0; i < 4; i++) toast.error(`error ${i}`);
    toast.info("hello");
    expect(current).toHaveLength(4);
    expect(current[current.length - 1]?.message).toBe("hello");
  });
});

void unsubscribe;