EasyMock使用方法 expect()和 expectLassCall()为模拟对象添加功能.看一下下面的代码片段.
//add the behavior of calc service to add two numbersEasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00);
这里我们已经指示EasyMock给添加10和20的行为添加到calcService的add方法,结果返回值30.00 .
此时,Mock只记录了行为,但它不能作为模拟对象.调用重播后,它按预期工作.
//add the behavior of calc service to add two numbersEasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00);//activate the mock//EasyMock.replay(calcService);
没有EasyMock.Replay()的示例
步骤1:创建名为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);; }
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); } }
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.模拟将由EasyMock创建.
文件:MathApplicationTester.java
import org.easymock.EasyMock;import org.easymock.EasyMockRunner;import org.easymock.Mock;import org.easymock.TestSubject;import org.junit.Assert;import org.junit.Before;import org.junit.Test;import org.junit.runner.RunWith;//@RunWith attaches a runner with the test class to initialize the test data@RunWith(EasyMockRunner.class)public class MathApplicationTester { // @TestSubject annotation is used to identify the class which is going to use the mock object @TestSubject MathApplication mathApplication = new MathApplication(); //@Mock annotation is used to create the mock object to be injected @Mock CalculatorService calcService; @Test public void testAdd(){ //add the behavior of calc service to add two numbers EasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00); //activate the mock //EasyMock.replay(calcService); //test the add functionality Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0); } }
第4步: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 Calculator Service.java Math Application.java Math Application Tester.java Test Runner.java
现在运行Test Runner查看结果:
C:\ EasyMock_WORKSPACE> java TestRunner
验证输出.
testAdd(MathApplicationTester): expected:but was:false
EasyMock.Replay()示例
步骤1:创建名为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); } }
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.模拟将由EasyMock创建.
文件:MathApplicationTester.java
import org.easymock.EasyMock;import org.easymock.EasyMockRunner;import org.easymock.Mock;import org.easymock.TestSubject;import org.junit.Assert;import org.junit.Before;import org.junit.Test;import org.junit.runner.RunWith;// @RunWith attaches a runner with the test class to initialize the test data@RunWith(EasyMockRunner.class)public class MathApplicationTester { // @TestSubject annotation is used to identify class which is going to use the mock object @TestSubject MathApplication mathApplication = new MathApplication(); // @Mock annotation is used to create the mock object to be injected @Mock CalculatorService calcService; @Test public void testAdd(){ // add the behavior of calc service to add two numbers EasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00); //activate the mock EasyMock.replay(calcService); // test the add functionality Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0); } }
第4步: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()); } }
第5步:验证结果
使用 javac 编译器编译类,如下所示:
C:\ EasyMock_WORKSPACE> javac Calculator Service.java Math Application.java Math Application Tester.java Test Runner.java
现在运行Test Runner查看结果.
C:\ EasyMock_WORKSPACE> java TestRunner
验证输出.
true