import assert from 'node:assert/strict';
import { api } from '../src/client/api.mjs';

const originalFetch = globalThis.fetch;
let calls = 0;
let release;
globalThis.fetch = async () => {
  calls += 1;
  await new Promise(resolve => { release = resolve; });
  return new Response(JSON.stringify({ ok: true, calls }), { status: 200, headers: { 'Content-Type': 'application/json' } });
};

try {
  const first = api('/api/large-ledger');
  const second = api('/api/large-ledger');
  await Promise.resolve();
  assert.equal(calls, 1, '并发的相同 GET 请求应只发送一次');
  release();
  assert.deepEqual(await first, { ok: true, calls: 1 });
  assert.deepEqual(await second, { ok: true, calls: 1 });
} finally {
  globalThis.fetch = originalFetch;
}

console.log('API read deduplication tests passed');