EasyMock, PowerMock 一行mock静态方法 static method

EasyMock, PowerMock 一起mock静态方法 static method

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

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

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：

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。