Junit运行流程及注解

待测试类

package top.chgl16.junit;

public class Calculate {
    public int add(int a, int b) {
        return a + b;
    }

    public int subtract(int a, int b) {
        return a - b;
    }

    public int multiply(int a, int b) {
        return a * b;
    }

    public int divide(int a, int b) {
        return a / b;
    }
}

Junit4 写的测试类

package test.top.chgl16.junit; 

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

/** 
* Calculate Tester. 
* 
* @author <Authors name> 
* @since <pre>���� 24, 2018</pre> 
* @version 1.0 
*/ 
public class CalculateTest {


@BeforeClass
public static void beforeClass() throws Exception {
    System.out.println("This is beforeClass.");
}

@AfterClass
public static void afterClass() throws Exception {
    System.out.println("This is afterClass.");
}

@Before
public void before() throws Exception {
    System.out.println("This is before");
}


@After
public void after() throws Exception {
    System.out.println("This is after");
} 

/** 
* 
* Method: add(int a, int b) 
* 
*/ 
@Test
public void testAdd() throws Exception { 
//TODO: Test goes here...
    System.out.println("This is testAdd()");
} 

/** 
* 
* Method: subtract(int a, int b) 
* 
*/ 
@Test
public void testSubtract() throws Exception { 
//TODO: Test goes here...
    System.out.println("This is testSubtract");
} 

/** 
* 
* Method: multiply(int a, int b) 
* 
*/ 
@Test
public void testMultiply() throws Exception { 
//TODO: Test goes here...
    System.out.println("This is testMultiply");
} 

/** 
* 
* Method: divide(int a, int b) 
* 
*/ 
@Test
public void testDivide() throws Exception { 
//TODO: Test goes here...
    System.out.println("This is testDivide");
} 


}

运行测试代码（在非测试方法处鼠标右键运行）

This is beforeClass.
This is before
This is testAdd()
This is after
This is before
This is testSubtract
This is after
This is before
This is testDivide
This is after
This is before
This is testMultiply
This is after
This is afterClass.

Process finished with exit code 0

Junit4 常用注解有

@BeforeClass #修饰为静态方法，在所有方法前调用执行，全局就一次。在内存中只保存一份实例，适合测试加载配置文件

@AfterClass #对应@BeforeClass也修饰静态方法，在所有方法后调用执行，全局一次。适合清理资源回收关闭

@Before #在每个测试方法前调用，每个测试方法都调用一次

@After #对应@Before，每个测试方法后调用

@Test #注释待测试方法

Junit运行流程及注解

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