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📜  EasyMock-第一个应用程序

📅  最后修改于: 2020-11-18 09:11:23             🧑  作者: Mango

在详细介绍EasyMock框架之前，让我们来看一个正在运行的应用程序。在此示例中，我们创建了一个Stock Service的模拟来获取某些股票的虚拟价格，并对单元名为java的Java类进行了单元测试。

下面将逐步讨论该过程。

第1步：创建一个JAVA类来代表股票

文件：Stock.java

public class Stock {
   private String stockId;
   private String name;    
   private int quantity;

   public Stock(String stockId, String name, int quantity){
      this.stockId = stockId;
      this.name = name;        
      this.quantity = quantity;        
   }

   public String getStockId() {
      return stockId;
   }

   public void setStockId(String stockId) {
      this.stockId = stockId;
   }

   public int getQuantity() {
      return quantity;
   }

   public String getTicker() {
      return name;
   }
}

步骤2：创建接口StockService以获得股票价格

文件：StockService.java

public interface StockService {
   public double getPrice(Stock stock);
}

步骤3：建立一个类别投资组合以代表任何客户的投资组合

档案：Portfolio.java

import java.util.List;

public class Portfolio {
   private StockService stockService;
   private List stocks;

   public StockService getStockService() {
      return stockService;
   }
   
   public void setStockService(StockService stockService) {
      this.stockService = stockService;
   }

   public List getStocks() {
      return stocks;
   }

   public void setStocks(List stocks) {
      this.stocks = stocks;
   }

   public double getMarketValue(){
      double marketValue = 0.0;
      
      for(Stock stock:stocks){
         marketValue += stockService.getPrice(stock) * stock.getQuantity();
      }
      return marketValue;
   }
}

步骤4：测试Portfolio类

让我们通过注入股票服务模型来测试Portfolio类。模拟将由EasyMock创建。

档案：PortfolioTester.java

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

import org.easymock.EasyMock;

public class PortfolioTester {
   Portfolio portfolio;    
   StockService stockService;

   public static void main(String[] args){
      PortfolioTester tester = new PortfolioTester();
      tester.setUp();
      System.out.println(tester.testMarketValue()?"pass":"fail");
   }

   public void setUp(){
      //Create a portfolio object which is to be tested        
      portfolio = new Portfolio();        
      
      //Create the mock object of stock service
      stockService = EasyMock.createMock(StockService.class);        
      
      //set the stockService to the portfolio
      portfolio.setStockService(stockService);
   }

   public boolean testMarketValue(){
   
      //Creates a list of stocks to be added to the portfolio
      List stocks = new ArrayList();
      Stock googleStock = new Stock("1","Google", 10);
      Stock microsoftStock = new Stock("2","Microsoft",100);    
      
      stocks.add(googleStock);
      stocks.add(microsoftStock);

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

      // mock the behavior of stock service to return the value of various stocks
      EasyMock.expect(stockService.getPrice(googleStock)).andReturn(50.00);
      EasyMock.expect(stockService.getPrice(microsoftStock)).andReturn(1000.00);        

      // activate the mock
      EasyMock.replay(stockService);        

      double marketValue = portfolio.getMarketValue();        
      return marketValue == 100500.0;
   }
}

步骤5：验证结果

使用javac编译器编译类，如下所示：

C:\EasyMock_WORKSPACE>javac Stock.java StockService.java Portfolio.java PortfolioTester.java

现在运行PortfolioTester来查看结果：

C:\EasyMock_WORKSPACE>java PortfolioTester

验证输出

pass