import { describe, expect, it, vi } from "vitest";

import {

type OAuthCredential,

buildXaiOAuthAuthorizeUrl,

fetchXaiOAuthDiscovery,

isTrustedXaiOAuthEndpoint,

it("refreshes with the cached token endpoint and preserves refresh fallback", async () => {

const fetchImpl = vi.fn(async (_url: string | URL | Request, init?: RequestInit) => {

expect(init?.method).toBe("POST");

const body = String(init?.body);

expect(typeof init?.body).toBe("string");

const body = init?.body as string;

expect(body).toContain("grant_type=refresh_token");

expect(body).toContain(`client_id=${encodeURIComponent(XAI_OAUTH_CLIENT_ID)}`);

expect(body).toContain("refresh_token=refresh-1");

refresh: "refresh-1",

expires: 100,

tokenEndpoint: "https://auth.x.ai/oauth2/token",

} as OAuthCredential & { tokenEndpoint: string },

} as unknown as Parameters<typeof refreshXaiOAuthCredential>[0],

{ fetchImpl, now: () => 1_000 },

);