2.使用前的准备,下载所需的jar包:easymock-3.0.jar(或以上版本),junit-4.4.jar,cglib-nodep-2.1_3.jar
3.使用方法较简单。主要有以下步骤:
*•使用 EasyMock 生成 Mock 对象;
*•设定 Mock 对象的预期行为和输出;
*•将 Mock 对象切换到 Replay 状态;
*•调用 Mock 对象方法进行单元测试;
*•对 Mock 对象的行为进行验证。
测试实例:假如我有一个IStudent接口类和StudentApplication类,StudentApplication类中用到了IStudent中的没实现的方法,而我想测试StudentApplication,这时用EasyMock构造一个IStudent的Mock对象,并给要用到的的未实现的方法设定已知返回值。
public interface IStudent { public String doMethod1(); public String doMethod2(); public String doMethod3(); }
public class StudentApplication { IStudent student=null; public StudentApplication(IStudent student) { this.student = student; } public String doMethod(){ String str1=student.doMethod1(); String str2=student.doMethod2(); String str3=student.doMethod3(); return str1+str2+str3; } public IStudent getStudent() { return student; } }
import main.IStudent; import main.StudentApplication; import org.easymock.EasyMock; import org.junit.Assert; import org.junit.Test; public class testStudentApplication { IStudent student; StudentApplication application; @Test public void testdoMethod(){ //•使用 EasyMock 生成 Mock 对象; student=EasyMock.createMock(IStudent.class); //设定 Mock 对象的预期行为和输出 EasyMock.expect(student.doMethod1()).andReturn("a").times(1); EasyMock.expect(student.doMethod2()).andReturn("b").times(1); EasyMock.expect(student.doMethod3()).andReturn("c").times(1); //将 Mock 对象切换到 Replay 状态 EasyMock.replay(student); //调用 Mock 对象方法进行单元测试 application=new StudentApplication(); application.setStudent(student); String getStr=application.doMethod(); //对 Mock 对象的行为进行验证 String cstr="abc";//正确的字符串 Assert.assertEquals(getStr, cstr); EasyMock.verify(student); } }
转自:http://www.cnblogs.com/zhongjinbin/archive/2012/01/31/2333747.html