EasyMock - createStrictMock

EasyMock.createStrictMock() 创建一个模拟，并负责模拟在其操作过程中进行的方法调用的顺序。

语法

calcService = EasyMock.createStrictMock(CalculatorService.class);

示例

步骤 1:创建一个名为 CalculatorService 的接口来提供数学函数

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 MathApplication 类中注入 calculatorService 的模拟来测试它。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 subtract()。但是在测试期间，我们在调用 add() 之前调用了 subtract()。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(){
    //添加行为以添加数字
    EasyMock.expect(calcService.add(20.0,10.0)).andReturn(30.0);
    
    //减去行为以减去数字
    EasyMock.expect(calcService.subtract(20.0,10.0)).andReturn(10.0);
    
    //激活模拟
    EasyMock.replay(calcService);
    
    //测试减法功能
    Assert.assertEquals(mathApplication.subtract(20.0, 10.0),10.0,0);
    
    //测试添加功能
    Assert.assertEquals(mathApplication.add(20.0, 10.0),30.0,0);
    
    //验证是否调用了 calcService
    EasyMock.verify(calcService);
   }
}

Step 4: Execute test cases

Create a java class file named TestRunner in C:\> EasyMock_WORKSPACE to execute Test case(s).

File: 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 Test Runner 以查看结果 −

C:\EasyMock_WORKSPACE>java TestRunner

输出

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