【转】EasyMock, PowerMock 一起mock静态方法 static method
29 Apr 2014
在哪下载包就不说了，要下这么几个：
easymock-3.1
easymockclassextension-3.1
powermock-easymock-junit-1.5
创建一个待会儿被mock的类， Job
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package com.jwu.mock;
import java.util.Random;
public class Job {
public Job(String name) {
this.name = name;
}
private String name;
public String getName() {
return name;
}
public static int generateId() {
return new Random().nextInt(1000);
}
}
再创建一个待会儿需要测试的类，该被测试的类需要用到被mock的类，Person
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package com.jwu.mock;
public class Person {
private int id;
private String name;
private Job job;
public Person() {
this(1, "noname", new Job("nojob"));
}
public Person(int id, String name, Job job) {
this.id = id;
this.name = name;
this.job = job;
}
public String getJobName() {
return job.getName();
}
public int getJobId() {
return Job.generateId();
}
public String getJobNamePrefixId() {
return getJobId() + getJobName();
}
public String toString() {
return "#" + id + ": " + name;
}
}
然后开始写UT类，这里演示了使用EasyMock去mock普通方法，和PowerMock去模拟静态方法：
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package com.jwu.mock;
import static org.junit.Assert.assertEquals;
import org.easymock.EasyMock;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.easymock.PowerMock;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
@RunWith(PowerMockRunner.class)
@PrepareForTest(Job.class)
public class MockStaticTest {
@Test
public void testMockMethod() {
Job job = EasyMock.createMock(Job.class);
String jobName = "owen";
EasyMock.expect(job.getName()).andReturn(jobName);
EasyMock.replay(job);
Person person = new Person(123, "testName", job);
assertEquals(person.getJobName(), jobName);
}
@Test
public void testStatic() {
Job job = EasyMock.createMock(Job.class);
int expectId = 1234;
PowerMock.mockStatic(Job.class);
EasyMock.expect(Job.generateId()).andReturn(expectId);
PowerMock.replay(Job.class);
Person person = new Person(123, "testName", job);
assertEquals(person.getJobId(), expectId);
}
@Test
public void testMix() {
Job job = EasyMock.createMock(Job.class);
int expectId = 1234;
PowerMock.mockStatic(Job.class);
EasyMock.expect(Job.generateId()).andReturn(expectId);
PowerMock.replay(Job.class);
String jobName = "owen";
EasyMock.expect(job.getName()).andReturn(jobName);
EasyMock.replay(job);
Person person = new Person(123, "testName", job);
assertEquals(person.getJobNamePrefixId(), expectId + jobName);
}
}
没有什么特别的，工具和包看一下就会了，真正重要的是怎么去设计UT。
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