import Database from 'better-sqlite3';
import { SearchService } from './search.service';
import { seedDatabase } from '../testing/seed';

/** SearchService 单元测试 — 对应 T-1.4 UT。*/
describe('SearchService', () => {
  let service: SearchService;
  let db: Database.Database;

  beforeAll(() => {
    db = new Database(':memory:');
    seedDatabase(db);
    service = new SearchService({ db } as any);
  });

  afterAll(() => db.close());

  it('空查询返回空结果', () => {
    expect(service.search('').results).toEqual([]);
  });

  it('按型号命中', () => {
    const res = service.search('CR400');
    expect(res.results.length).toBeGreaterThan(0);
    expect(res.results[0].model_code).toBe('CR400AF');
  });

  it('按生产商命中', () => {
    const res = service.search('株洲');
    expect(res.results.some((r) => r.model_code === 'HXD1型')).toBe(true);
  });

  it('精确匹配排在前', () => {
    const res = service.search('CR400AF');
    expect(res.results[0].rank).toBe(0);
  });

  it('特殊字符不崩溃', () => {
    expect(() => service.search("%_'")).not.toThrow();
  });
});