EasyMock - EasyMockSupport

EasyMockSupport是测试类的实用程序或帮助程序类.它提供以下功能:

• replayAll()  - 在一个批次中注册所有创建的模拟.

• verifyAll()  - 验证一批中的所有模拟操作.

• resetAll()  - 在一个批次中重置所有模拟操作.

示例

步骤1:创建一个名为CalculatorService的接口提供数学函数

文件: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);
}

第2步:创建一个JAVA类来表示MathApplication

文件: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);
   } 
}

第3步:测试MathApplication类

让我们通过在其中注入一个模拟的calculatorService来测试MathApplication类.模拟将由EasyMock创建.

文件: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 subtract 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 subtract 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();
   }
}

第4步:执行测试用例

在 C:\> EasyMock_WORKSPACE 中创建一个名为TestRunner的java类文件，以执行测试用例.

文件: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());
   } 
}

第5步:验证结果

使用javac编译器编译类，如下所示:

C:\ EasyMock_WORKSPACE> javac MathApplicationTester.java

现在运行Test Runner查看结果:

C:\ EasyMock_WORKSPACE> java TestRunner

验证输出.

true