import { describe, expect, mock, test } from "bun:test";

mock.module("cloudflare:workers", () => ({ env: {}, waitUntil: () => undefined }));

const { LruCache } = await import("./resolve-guard");

describe("LruCache", () => {
  test("evicts the least recently used entry instead of clearing", () => {
    const cache = new LruCache<number>(2);
    cache.set("a", 1);
    cache.set("b", 2);
    expect(cache.get("a")).toBe(1);
    cache.set("c", 3);
    expect(cache.get("b")).toBeUndefined();
    expect(cache.get("a")).toBe(1);
    expect(cache.get("c")).toBe(3);
    expect(cache.size).toBe(2);
  });

  test("overwriting a key refreshes it without growing", () => {
    const cache = new LruCache<number>(2);
    cache.set("a", 1);
    cache.set("b", 2);
    cache.set("a", 3);
    cache.set("c", 4);
    expect(cache.get("a")).toBe(3);
    expect(cache.get("b")).toBeUndefined();
  });
});