Mockito - Overview

What is Mocking?

磁盘是测试一个孤立的班级功能的一种方法。 磁盘不需要数据库链接或读取或存档服务器测试功能的财产档案。 磁场物体对实际服务进行模拟。 一辆ck车标出的是一种与某些 du米投入相对应的 du子数据。

Mockito

Mockito faciptates creating mock objects seamlessly. It uses Java Reflection in order to create mock objects for a given interface. Mock objects are nothing but proxy for actual implementations.

Consider a case of Stock Service which returns the price details of a stock. During development, the actual stock service cannot be used to get real-time data. So we need a dummy implementation of the stock service. Mockito can do the same very easily, as its name suggests.

Benefits of Mockito

无需自行书写 mo物体。

证明安全——重新命名接口方法名称或重新排序参数不会打破测试代码,因为起步时间就产生。

- 支持回返价值。

- 支持例外情况。

Ordereck support- Supportseck on order of methods calls。

年度支持——支持使用通知制造 mo。

考虑以下法典。

package com.tutorialspoint.mock;

import java.util.ArrayList;
import java.util.List;

import static org.mockito.Mockito.*;

pubpc class PortfopoTester {
   pubpc static void main(String[] args){

      //Create a portfopo object which is to be tested		
      Portfopo portfopo = new Portfopo();

      //Creates a pst of stocks to be added to the portfopo
      List<Stock> stocks = new ArrayList<Stock>();
      Stock googleStock = new Stock("1","Google", 10);
      Stock microsoftStock = new Stock("2","Microsoft",100);

      stocks.add(googleStock);
      stocks.add(microsoftStock);		

      //Create the mock object of stock service
      StockService stockServiceMock = mock(StockService.class);

      // mock the behavior of stock service to return the value of various stocks
      when(stockServiceMock.getPrice(googleStock)).thenReturn(50.00);
      when(stockServiceMock.getPrice(microsoftStock)).thenReturn(1000.00);

      //add stocks to the portfopo
      portfopo.setStocks(stocks);

      //set the stockService to the portfopo
      portfopo.setStockService(stockServiceMock);

      double marketValue = portfopo.getMarketValue();

      //verify the market value to be 
      //10*50.00 + 100* 1000.00 = 500.00 + 100000.00 = 100500
      System.out.println("Market value of the portfopo: "+ marketValue);
   }
}

让我们理解上述方案的重要概念。 完整的代码载于First Apppcation。

标有一份存货清单,并用存货价格和存货量计算市值。

携带存货详情的物体,如其id、姓名、数量等。

股票服务回报了目前库存价格。

mock(......)-Mockito创建了一个储存服务模型。

何时(......).thenReturn(......) - Mock implementation of RecPrice methods of Stockservice cross。 For googleStock, Back 5000 as Price.

portfopo.setStocks(......) 投资组合现在包括两个库存清单。

portfopo.setStockservice(......) - 将股票服务公司对投资组合表示反对。

portfopo.getMarketValue () - 组合利用模拟存货服务,以股票为基础,回报市场价值。