import 'package:flutter_test/flutter_test.dart';
import 'package:pangolin_vpn/models/device_usage.dart';

void main() {
  group('DeviceUsage.fromJson', () {
    test('parses a full row and derives totals', () {
      final d = DeviceUsage.fromJson(const {
        'uuid': 'dev-a',
        'name': 'My iPhone',
        'platform': 'ios',
        'bytes_up': 1500,
        'bytes_down': 2500,
        'minutes_used': 8,
      });
      expect(d.uuid, 'dev-a');
      expect(d.name, 'My iPhone');
      expect(d.platform, 'ios');
      expect(d.bytesUp, 1500);
      expect(d.bytesDown, 2500);
      expect(d.minutesUsed, 8);
      expect(d.bytesTotal, 4000);
      expect(d.gbTotal, 4000 / (1024 * 1024 * 1024));
    });

    test('tolerates missing/absent fields with zero defaults', () {
      final d = DeviceUsage.fromJson(const {'uuid': 'dev-b', 'name': '', 'platform': ''});
      expect(d.bytesUp, 0);
      expect(d.bytesDown, 0);
      expect(d.minutesUsed, 0);
      expect(d.bytesTotal, 0);
    });
  });
}