- EasyMock教程
- EasyMock - 主页
- EasyMock - 概述
- EasyMock - 环境设置
- EasyMock - 第一个应用程序
- EasyMock - JUnit 集成
- EasyMock - 添加Behave
- EasyMock - 验证Behave
- EasyMock - 期待来电
- EasyMock - 不同的调用
- EasyMock - 异常处理
- EasyMock-createMock
- EasyMock - createStrictMock
- EasyMock - createNiceMock
- EasyMock 有用资源
- EasyMock - 快速指南
- EasyMock - 有用的资源
- EasyMock - 讨论
EasyMock - createNiceMock
EasyMock.createNiceMock() 创建一个模拟并设置该模拟的每个方法的默认实现。如果使用 EasyMock.createMock(),则调用模拟方法会引发断言错误。
句法
calcService = EasyMock.createNiceMock(CalculatorService.class);
例子
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); }
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); } }
步骤 3:测试 MathApplication 类
让我们通过向其中注入calculatorService 的模拟来测试MathApplication 类。模拟将由 EasyMock 创建。
这里我们通过expect()添加了一个模拟方法调用add()。然而在测试过程中,我们也调用了subtract() 和其他方法。当我们使用 EasyMock.createNiceMock() 创建模拟对象时,可以使用具有默认值的默认实现。
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.createNiceMock(CalculatorService.class); mathApplication.setCalculatorService(calcService); } @Test public void testCalcService(){ //add the behavior to add numbers EasyMock.expect(calcService.add(20.0,10.0)).andReturn(30.0); //activate the mock EasyMock.replay(calcService); //test the add functionality Assert.assertEquals(mathApplication.add(20.0, 10.0),30.0,0); //test the subtract functionality Assert.assertEquals(mathApplication.subtract(20.0, 10.0),0.0,0); //test the multiply functionality Assert.assertEquals(mathApplication.divide(20.0, 10.0),0.0,0); //test the divide functionality Assert.assertEquals(mathApplication.multiply(20.0, 10.0),0.0,0); //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 类文件来执行测试用例。
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
现在运行测试运行程序来查看结果 -
C:\EasyMock_WORKSPACE>java TestRunner
输出
验证输出。
true