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📜  EasyMock-createStrictMock

📅  最后修改于: 2020-11-18 09:15:41             🧑  作者: Mango

EasyMock.createStrictMock()创建一个模拟，并照顾该模拟将在其适当的时候进行的方法调用的顺序。

句法

calcService = EasyMock.createStrictMock(CalculatorService.class);

例

步骤1：创建一个名为CalculatorService的接口以提供数学函数

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);
}

步骤2：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);
   }
}

步骤3：测试MathApplication类

让我们通过向其注入一个CalculatorService模拟来测试MathApplication类。模拟将由EasyMock创建。

在这里，我们通过Expect()向模拟对象添加了两个模拟方法调用add()和减去()。但是，在测试过程中，我们在调用add()之前先调用了减去()。当我们使用EasyMock.createStrictMock()创建模拟对象时，方法的执行顺序很重要。

文件：MathApplicationTester.java

import org.easymock.EasyMock;
import org.easymock.EasyMockRunner;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(EasyMockRunner.class)
public class MathApplicationTester {
    
   private MathApplication mathApplication;
   private CalculatorService calcService;
   
   @Before
   public void setUp(){
      mathApplication = new MathApplication();
      calcService = EasyMock.createStrictMock(CalculatorService.class);
      mathApplication.setCalculatorService(calcService);
   }

   @Test
   public void testAddAndSubtract(){
      
      //add the behavior to add numbers
      EasyMock.expect(calcService.add(20.0,10.0)).andReturn(30.0);
      
      //subtract the behavior to subtract numbers
      EasyMock.expect(calcService.subtract(20.0,10.0)).andReturn(10.0);
      
      //activate the mock
      EasyMock.replay(calcService);    
    
      //test the subtract functionality
      Assert.assertEquals(mathApplication.subtract(20.0, 10.0),10.0,0);
      
      //test the add functionality
      Assert.assertEquals(mathApplication.add(20.0, 10.0),30.0,0);
      
      //verify call to calcService is made or not
      EasyMock.verify(calcService);
   }
}

步骤4：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());
   }
}

步骤5：验证结果

使用javac编译器编译类，如下所示：

C:\EasyMock_WORKSPACE>javac MathApplicationTester.java

现在运行测试运行器以查看结果：

C:\EasyMock_WORKSPACE>java TestRunner

验证输出。

testAddAndSubtract(com.tutorialspoint.mock.MathApplicationTester): 
   Unexpected method call CalculatorService.subtract(20.0, 10.0):
      CalculatorService.add(20.0, 10.0): expected: 1, actual: 0
false