将 JSON 对象转换为响应对象

Question

我正在尝试将模拟 JSON 数据传递到我的 jasmine 单元测试中。

我的 JSON 格式如下所示：

{   
   "CompanyResponse":{    
      "CompanyCreatedDate":"1990-10-02",    
      "RunDate":"2",   
      "LastChangedDate":"2015-10-02",   
      "CompanySummary": {   
         "Id":"Apple",   
         "MaximumCredit":"10000000",   
         "Margin":"60000000",    
         "Limit":"-1500000",    
         "HistoricData":{    
            "CompanyHistoricData": [   
               {  
                  "LaunchDate":"2008-08-31",  
                  "Product":"Iphone2",  
                  "TotalProductsCreated":"1000000",  
                  "TotalProductsSold":"800000",  
                  "TotalReturns":"200000",  
                  "TotalMargin":"600000"  
               },  
               {  
                  "LaunchDate":"2010-08-31",  
                  "Product":"Iphone4",  
                  "TotalProductsCreated":"2000000",  
                  "TotalProductsSold":"1500000",  
                  "TotalReturns":"350000",  
                  "TotalMargin":"800000"  
               }  
            ]  
         },  
         "RefurbishedData": {  
            "CompanyRefurbished": [  
               {  
                  "Id":"Apple.201221.12",  
                  "ProductId":"iph-213454",  
                  "StartDate":"2015-09-07",  
                  "FinishDate":"2015-09-10",  
                  "CostOfRefurbishing":"50"  
               },  
               {  
                  "Id":"Apple.201228.12",  
                  "ProductId":"iph-4155655",  
                  "StartDate":"2015-09-10",    
                  "FinishDate":"2015-09-12",  
                  "CostOfRefurbishing":"85"  
               }  
            ]  
         }  
      }  
   }  
}  

我正在使用上面的 JSON 传递一个类似于下面的函数进行单元测试：

public getTotal(response: CompanyResponse): void {    
  var companySummary = response.CompanySummary;    
  
  //gets total 'CostOfRefurbishing' for all phones    
  var totalRefurbishmentAmount :number = 0;

  for (let companyRefurbishments of companySummary.RefurbishedData) {
    totalRefurbishmentAmount += Number.parseInt(companyRefurbishments.CostOfRefurbishing.toString());
  }
}

---

我面临的问题是我无法CompanyResponse整体传递给getTotal()函数。即使我使用它也不起作用，JSON.stringify()因为它只是将其转换为字符串，如果我使用它也不起作用JSON.parse()，因为它将其转换回对象格式。

以下是我们getTotal()在正常情况下调用该方法的方式：

export class MyService{    
 async CompanySummary(): Promise<CompanySummaryResponse>    
{    
    const response = await this.http.fetch('CompanySummary');    
    return await response.json();    
  }    
}    

var myService = new MyService();    
CompanySummary: CompanySummaryResponse;    
CompanySummary = await myService.CompanySummary();    
this.calculator.getTotal(CompanySummary);    

干杯，大师

Answer 1

您可以使用JavaScript Fetch API 中的标准响应接口来模拟响应对象吗？

如果您查看构造函数方法的文档- 它接受一个body参数和一个init选项对象。该body参数可以是一个斑点，所以你可以;

var data = {foo: "bar"};
var blob = new Blob([JSON.stringify(data, null, 2)], {type : 'application/json'});

var init = { "status" : 200 , "statusText" : "SuperSmashingGreat!" };
var myResponse = new Response(blob, init);

这将创建一个Response您应该能够传递给您的测试的对象。