EasyMockSupport（ 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() - 在一个批处理中注册所有创建的replayAll() 。
• verifyAll() - 验证一批中的所有模拟操作。
• resetAll() - 重置一个批处理中的所有模拟操作。

例子 (Example)

Step 1: Create an interface called CalculatorService to provide mathematical functions

File: 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);
}

Step 2: Create a JAVA class to represent MathApplication

File: 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);
   }
}

Step 3: Test the MathApplication class

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

File: 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();
   }
}

Step 4: Execute test cases

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

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());
   }
}  	

Step 5: Verify the Result

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来查看结果:

C:\EasyMock_WORKSPACE>java TestRunner

验证输出。

true