demo目录结构
1.新建project(junit4Demo),src下建package(com.imooc.util),包里新建Calculate.java
package com.imooc.util;
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 devide(int a, int b)
{
return a / b;
}
}
2.导入单元测试jar包:右键Build Path --> Add Libraries --> Junit --> Junit4
3.新建测试类(CalculateTest.java):右键需测试类所在包new --> JUnit Test Case
package com.imooc.util;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class CalculateTest
{
@Test
public void add()
{
// assertEquals(预测值, 传参)
assertEquals(6, new Calculate().add(3, 3));
}
}
4.运行测试:CalculateTest右键 --> Run as JUnit Test
5.Junit视图:状态条(绿色——测试成功;红色——测试失败)