EasyMock EasyMockSupport - EasyMock教程

EasyMockSupport是Utiliy或辅助类的测试类。它提供了以下功能

• replayAll() - 都记录在一个批次中创建模拟。

• verifyAll() - 验证所有模拟操作于一个批次。

• resetAll() - 将所有模拟操作于一个批次。

示例

创建一个接口CalculatorService，其目的是提供各种计算相关的功能。

CalculatorService.java

public interface CalculatorService {
   public double add(double input1, double input2);
   public double subtract(double input1, double input2);
   public double multiply(double input1, double input2);
   public double divide(double input1, double input2);
}

创建一个Java类用来表示MathApplication。

MathApplication.java

public class MathApplication {
   private CalculatorService calcService;

   public void setCalculatorService(CalculatorService calcService){
      this.calcService = calcService;
   }
   public double add(double input1, double input2){
      return calcService.add(input1, input2);        
   }
   public double subtract(double input1, double input2){
      return calcService.subtract(input1, input2);
   }
   public double multiply(double input1, double input2){
      return calcService.multiply(input1, input2);
   }
   public double divide(double input1, double input2){
      return calcService.divide(input1, input2);
   }
}

让我们来测试MathApplication类，通过它注入CalculatorService作一个模拟。Mock将由EasyMock创建。

MathApplicationTester.java

import org.easymock.EasyMockRunner;
import org.easymock.EasyMockSupport;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(EasyMockRunner.class)
public class MathApplicationTester extends EasyMockSupport {

   private MathApplication mathApplication1;
   private MathApplication mathApplication2;

   private CalculatorService calcService1;
   private CalculatorService calcService2;

   @Before
   public void setUp(){
      mathApplication1 = new MathApplication();
      mathApplication2 = new MathApplication();
      calcService1 = createNiceMock(CalculatorService.class);
      calcService2 = createNiceMock(CalculatorService.class);
      mathApplication1.setCalculatorService(calcService1);
      mathApplication2.setCalculatorService(calcService2);
   }

   @Test
   public void testCalcService(){
      //activate all mocks
      replayAll();    
      //test the add functionality
      Assert.assertEquals(mathApplication1.add(20.0, 10.0),0.0,0);
      //test the substract functionality
      Assert.assertEquals(mathApplication1.subtract(20.0, 10.0),0.0,0);
      //test the multiply functionality
      Assert.assertEquals(mathApplication1.divide(20.0, 10.0),0.0,0);        
      //test the divide functionality
      Assert.assertEquals(mathApplication1.multiply(20.0, 10.0),0.0,0);

      //test the add functionality
      Assert.assertEquals(mathApplication2.add(20.0, 10.0),0.0,0);
      //test the substract functionality
      Assert.assertEquals(mathApplication2.subtract(20.0, 10.0),0.0,0);
      //test the multiply functionality
      Assert.assertEquals(mathApplication2.divide(20.0, 10.0),0.0,0);        
      //test the divide functionality
      Assert.assertEquals(mathApplication2.multiply(20.0, 10.0),0.0,0);

      //verify all the mocks
      verifyAll();
}
}

创建一个Java类在文件夹 C:\ > EasyMock_WORKSPACE 执行测试用例

TestRunner.java

import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;

public class TestRunner {
   public static void main(String[] args) {
      Result result = JUnitCore.runClasses(MathApplicationTester.class);
      for (Failure failure : result.getFailures()) {
         System.out.println(failure.toString());
      }
      System.out.println(result.wasSuccessful());
   }
}

验证结果

使用javac编译如下类

C:\EasyMock_WORKSPACE>javac MathApplicationTester.java

现在运行测试运行看结果

C:\EasyMock_WORKSPACE>java TestRunner

验证输出

true