flutter - 使用Flutter TDD返回基于json文件的有效BusinessCard模型

Question

我正在尝试学习 flutter TDD，我想编写一个代码，该代码应从包含有关名片信息的json文件中返回有效的BusinessCardModel。
但是当我尝试运行此测试时:

    import 'dart:convert';
    
    import 'package:cardatyapp/core/data/models/businessCard_model.dart';
    import 'package:cardatyapp/core/domain/entities/businessCard.dart';
    import 'package:flutter_test/flutter_test.dart';
    
    import '../../../fixtures/fixtures_reader.dart';
    
    void main() {
      final tbusinessCardModel = BusinessCardModel(
        id: '01',
        jobTitle: 'fullstack developer',
        jobDetails: 'creating fontend, backend & mobile applications',
        organization: 'freelance',
      );
    
      test('sould be a subclass of the Card entity', () {
        //assert
        expect(tbusinessCardModel, isA<BusinessCard>());
      });
    
      test(
          'should return a valid BusinessCardModel when json file contains BusinessCard',
          () async {
        //arrange
        final Map<String, dynamic> jsonMap = json.decode(readFixture('card.json'));
        //act
        final result = BusinessCardModel.fromJson(jsonMap);
        //assert
    
        expect(result, tbusinessCardModel);
      });
    }

我有这个错误!
我不明白？

    ERROR: Expected: BusinessCardModel:<BusinessCardModel>
      Actual: BusinessCardModel:<BusinessCardModel>

以下是代码片段:

card.json file:

    {
        "uuid": "recqPz5M7tQTYesc3",
            "fav_by_user": [
                "reclZ8MXHwYKSXgNz"
            ],
            "created_by_user": [
                "recQ0XTSbKoezQCmQ"
            ],
            "job_title": "Account Executive",
            "id_card": "1",
            "organization": "Buzzshare",
            "job_details": "In hac habitasse platea dictumst. Etiam faucibus cursus urna. Ut tellus.\n\nNulla ut erat id mauris vulputate elementum. Nullam varius. Nulla facilisi.",
        "createdTime": "2020-10-02T08:41:13.000Z"
    }

名片实体:

    import 'package:equatable/equatable.dart';
    import 'package:meta/meta.dart';
    
    class BusinessCard extends Equatable {
      final String id;
      final String jobTitle;
      final String jobDetails;
      final String organization;
    
      BusinessCard({
        this.id,
        @required this.jobTitle,
        @required this.jobDetails,
        @required this.organization,
      });
    
      @override
      List<Object> get props => [
            id,
            jobTitle,
            jobDetails,
            organization,
          ];
    }

名片模型(基于先前的实体):

    import 'package:meta/meta.dart';
    
    import '../../domain/entities/businessCard.dart';
    
    class BusinessCardModel extends BusinessCard {
      BusinessCardModel({
        String id,
        @required String jobTitle,
        @required String jobDetails,
        @required String organization,
      }) : super(
              id: id,
              jobTitle: jobTitle,
              jobDetails: jobDetails,
              organization: organization,
            );
      factory BusinessCardModel.fromJson(Map<String, dynamic> jsonMap) {
        return BusinessCardModel(
          id: jsonMap['id_card'],
          jobTitle: jsonMap['jobTitle'],
          jobDetails: jsonMap['jobDetails'],
          organization: jsonMap['organization'],
        );
      }
    }

要读取json文件，我正在使用灯具阅读器:

    import 'dart:io';
    
    String readFixture(String fileName) =>
        File('test/fixtures/$fileName').readAsStringSync();

请帮助我理解并解决该错误!

Answer 1

您的BusinessCardModel扩展了BusinessCard，该扩展了Equatable，所有成员均作为 Prop 。结果，当您比较两个具有不同成员值的模型的不同实例时，您将得到现在正在执行的false!您期望的id模型为'01'，而您将要运行的模型BusinessCardModel.fromJson(jsonMap)的'1'为id。您应该更改tbusinessCardModel以匹配您定义的灯具。