import { ClientIpThrottlerGuard } from './client-ip-throttler.guard';

describe('ClientIpThrottlerGuard.getTracker', () => {
  // getTracker is protected and needs none of the guard's dependencies.
  const guard = Object.create(
    ClientIpThrottlerGuard.prototype,
  ) as ClientIpThrottlerGuard & {
    getTracker(req: Record<string, any>): Promise<string>;
  };

  it('tracks IPv6 clients by their /64 prefix', async () => {
    await expect(guard.getTracker({ ip: '2001:db8:1:2::9' })).resolves.toBe(
      '2001:db8:1:2::/64',
    );
  });

  it('tracks IPv4 clients by address', async () => {
    await expect(guard.getTracker({ ip: '203.0.113.7' })).resolves.toBe(
      '203.0.113.7',
    );
  });

  it('falls back to a stable key when req.ip is missing', async () => {
    await expect(guard.getTracker({})).resolves.toBe('unknown');
  });
});