import { describe, expect, it } from "vitest";
import { waitForAbortSignal } from "./abort-signal.js";

describe("waitForAbortSignal", () => {
  it("resolves immediately when signal is missing", async () => {
    await expect(waitForAbortSignal(undefined)).resolves.toBeUndefined();
  });

  it("resolves immediately when signal is already aborted", async () => {
    const abort = new AbortController();
    abort.abort();
    await expect(waitForAbortSignal(abort.signal)).resolves.toBeUndefined();
  });

  it("waits until abort fires", async () => {
    const abort = new AbortController();
    let resolved = false;

    const task = waitForAbortSignal(abort.signal).then(() => {
      resolved = true;
    });
    await Promise.resolve();
    expect(resolved).toBe(false);

    abort.abort();
    await task;
    expect(resolved).toBe(true);
  });
});