Mockito提供了一个特殊的超时选项来测试是否在规定的时间范围内调用方法.
//在100毫秒内调用add()时传递. verify(calcService,timeout(100)).add(20.0,10.0);
步骤1号;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); }
第2步去;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步和第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. Mock将由Mockito创建.
文件:MathApplicationTester.java
package com.it1352.mock; import static org.mockito.Mockito.mock; import static org.mockito.Mockito.verify; import static org.mockito.Mockito.when; import org.junit.Assert; import org.junit.Before; import org.junit.Test; import org.junit.runner.RunWith; import org.mockito.runners.MockitoJUnitRunner; // @RunWith attaches a runner with the test class to initialize the test data @RunWith(MockitoJUnitRunner.class) public class MathApplicationTester { private MathApplication mathApplication; private CalculatorService calcService; @Before public void setUp(){ mathApplication = new MathApplication(); calcService = mock(CalculatorService.class); mathApplication.setCalculatorService(calcService); } @Test public void testAddAndSubtract(){ //add the behavior to add numbers when(calcService.add(20.0,10.0)).thenReturn(30.0); //subtract the behavior to subtract numbers when(calcService.subtract(20.0,10.0)).thenReturn(10.0); //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 add method to be completed within 100 ms verify(calcService, timeout(100)).add(20.0,10.0); //invocation count can be added to ensure multiplication invocations //can be checked within given timeframe verify(calcService, timeout(100).times(1)).subtract(20.0,10.0); } }
步骤4 : 执行测试用例
在 C:\>中创建名为TestRunner的java类文件Mockito_WORKSPACE 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步去;验证结果
使用 javac 编译器编译类,如下所示 :
C:\ Mockito_WORKSPACE> javac CalculatorService.java MathApplication. java MathApplicationTester.java TestRunner.java
现在运行Test Runner查看结果 :
C:\ Mockito_WORKSPACE> java TestRunner
验证输出.
true