tm_app/test/model/recommend_response_test.dart

import 'package:flutter_test/flutter_test.dart';
import 'package:tm_app/data/services/model/recommend_response/recommend_response.dart';

void main() {
  group('RecommendResponse Model Test', () {
    final mockJson = {
      'success': true,
      'message': 'AI recommendations retrieved successfully',
      'data': [
        {
          'rank': '1',
          'tender_id': '674a1b2c3d4e5f6789012345',
          'analysis': 'Strong match based on company industry and CPV codes.',
        },
        {
          'rank': '2',
          'tender_id': '674a1b2c3d4e5f6789012346',
          'analysis': 'Relevant scope and geographic fit.',
        },
      ],
      'error': {'message': null, 'code': null, 'details': null},
    };

    test('fromJson parses the ranked recommendation list', () {
      final response = RecommendResponse.fromJson(mockJson);

      expect(response.success, true);
      expect(response.data, isNotNull);
      expect(response.data!.length, 2);
      expect(response.data!.first.rank, '1');
      expect(response.data!.first.tenderId, '674a1b2c3d4e5f6789012345');
      expect(
        response.data!.first.analysis,
        'Strong match based on company industry and CPV codes.',
      );
    });

    test('handles empty data (AI still indexing)', () {
      final response = RecommendResponse.fromJson({
        'success': true,
        'message': 'AI recommendations retrieved successfully',
        'data': <dynamic>[],
        'error': null,
      });

      expect(response.success, true);
      expect(response.data, isEmpty);
    });

    test('toJson round-trips the nested items', () {
      final response = RecommendResponse.fromJson(mockJson);
      final json = response.toJson();
      final data = (json['data'] as List).cast<Map<String, dynamic>>();

      expect(json['success'], true);
      expect(data.length, 2);
      expect(data[1]['tender_id'], '674a1b2c3d4e5f6789012346');
      expect(data[1]['rank'], '2');
    });

    test('equality and copyWith work as expected', () {
      final response = RecommendResponse.fromJson(mockJson);
      final updated = response.copyWith(message: 'Updated');

      expect(updated.message, 'Updated');
      expect(updated != response, true);
    });
  });
}