用typescript编写服务文件的测试用例

用typescript编写服务文件的测试用例,typescript,testing,jestjs,Typescript,Testing,Jestjs,我对编写测试用例比较陌生。我有一个typescript服务,我计划为它编写测试文件。它包含嵌套方法。它们不包含返回语句。我是否应该只为main方法编写测试用例。由于它不包含no return语句,如何测试我的文件?如果有人能帮我测试这个文件,我将不胜感激 @Injectable() export class MessageService { constructor( private readonly httpService: HttpService, private read

我对编写测试用例比较陌生。
我有一个typescript服务,我计划为它编写测试文件。它包含
嵌套方法
。它们不包含返回语句。我是否应该只为main方法编写测试用例。由于它不包含
no return
语句,如何测试我的文件?如果有人能帮我测试这个文件,我将不胜感激

@Injectable()
export class MessageService {
  constructor(
    private readonly httpService: HttpService,
    private readonly messagePublishService: MessagePublishService,
    private readonly configService: ConfigService,
  ) {}
  message = new ProductMessage();
  publishMessages(productEvent: ProductEvent): Observable<any> {
    let json = '';

    const url = this.configService.get('SITEMAP_ENDPOINT');
    const urls = [url + '/sitemap/retrieve/ide', url + '/sitemap/retrieve/tpd'];
    try {
      for (let i = 0; i < urls.length; i++) {
        return https.get(urls[i], res => {
          res.on('data', chunk => {
            json += chunk;
          });
          res.on('end', () => {
            const result = JSON.parse(json);
            getProductCodes(productEvent, result, this.messagePublishService);
          });
        });
      }
    } catch (err) {
      console.error(err);
    }
  }
}

function getProductCodes(
  productEvent,
  result,
  messagePublishService: MessagePublishService,
) {
  const splitCodes = productEvent.productCodes.split(',');
  const splitvehicleType = productEvent.vehicleType.split(',');
  const source: string = 'PCS_DATACACHE_TOPIC_ARN';

  for (let i = 0; i < result.length; i++) {
    for (let j = 0; j < result[i].products.length; j++) {
      if (
        productEvent.productCodes.length !== 0 &&
        productEvent.productCodes !== undefined
      ) {
        searchProductCode(
          messagePublishService,
          splitCodes,
          result,
          i,
          j,
          source,
        );
      }  else {
        console.log('No data found');
        return;
      }
    }
  }
}

function searchProductCode(
  messagePublishService,
  splitCodes,
  result,
  i,
  j,
  source,
) {
  for (let k = 0; k < splitCodes.length; k++) {
    if (result[i].products[j].productCode === splitCodes[k]) {
      console.log(
        'Product Codes: ' +
          result[i].products[j].productCode +
          ' Country : ' +
          result[i].country +
          ' Language : ' +
          result[i].language,
      );
      const message: string =
        'Product Codes: ' +
        result[i].products[j].productCode +
        ' Country : ' +
        result[i].country +
        ' Language : ' +
        result[i].language;
      messagePublishService.publish(source, message);
    }
  }
}

@Injectable()
导出类消息服务{
建造师(
专用只读httpService:httpService,
私有只读messagePublishService:messagePublishService,
专用只读configService:configService,
) {}
message=newproductmessage();
publishMessages(productEvent:productEvent):可观察{
让json='';
const url=this.configService.get('SITEMAP_ENDPOINT');
常量url=[url+'/sitemap/retrieve/ide',url+'/sitemap/retrieve/tpd'];
试一试{
for(设i=0;i{
res.on('data',chunk=>{
json+=chunk;
});
res.on('结束',()=>{
const result=JSON.parse(JSON);
getProductCodes(productEvent、result、this.messagePublishService);
});
});
}
}捕捉(错误){
控制台错误(err);
}
}
}
函数getProductCodes(
productEvent,
结果,,
messagePublishService:messagePublishService,
) {
const splitCodes=productEvent.productCodes.split(',');
const splitvehicleType=productEvent.vehicleType.split(',');
const source:string='PCS\u DATACACHE\u TOPIC\u ARN';
for(设i=0;i
对于此类案件,您可以使用
间谍

使用spies,您可以检查是否调用了类的方法(次数、给出的参数等)

const spy = spyOn(messagePublishService, "publish");

service.searchProductCode(...arguments);

expect(spy).toHaveBeenCalledWith("expectedSource", "expectedMessage")