Java 单元测试(Junit Test)

说到单元测试，不得不说Junit框架，它提供了居于方法的就能直接运行某方法;

引入Junit包

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.12</version>
</dependency>

import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;

public class JunitTest {
  @BeforeClass
	public static void testBeforeClass()
	{
		System.out.println("======> testBeforeClass");
	}

	@Before
	public void testBefore()
	{
		System.out.println("======> testBefore");
	}

	@Test
	public void testHelloword()
	{
		System.out.println("======> test");
	}

	@After
	public void testAfter()
	{
		System.out.println("======> testAfter");
	}

	@AfterClass
	public static void  testAfterClass()
	{
		System.out.println("======> testAfterClass");
	}

	@Ignore
	public void testIgnore()
	{
		System.out.println("======> testIgnore");
	}
}

代码写好了，那怎样运行呢？

过程如下:

• 鼠标右键选中方法testHelloword()
• Run As -> 1 Junit Test (正常运行)
• Debug As -> 1 Junit Test (debug运行)

运行结果如下

======> testBeforeClass
======> testBefore
======> test
======> testAfter
======> testAfterClass

因此我可以总结出:

• 一个单元测试用例执行顺序为： @BeforeClass –> @Before –> @Test –> @After –> @AfterClass
• 每一个测试方法的调用顺序为： @Before –> @Test –> @After