Add junit unit test to idea

One, download the jar package

Link: https://pan.baidu.com/s/1FzBoZbyGXo6sgG726CBazQ
Extraction code: rmgh

Two, add the jar package to the project

Three, write test cases, test classes

public class Calculator {
    
    

    /**
     * 加法
     *
     * @param a
     * @param b
     * @return a + b
     */
    public int add(int a, int b) {
    
    
        return a + b;
    }

    /**
     * 减法
     * @param a
     * @param b
     * @return a - b
     */
    public int sub(int a, int b) {
    
    
        return a - b;
    }
}

Test class

import com.sky.junit.Calculator;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;


public class CalculatorTest {
    
    
    /**
     * 初始化方法
     * 用于资源申请，所有测试方法在执行之前都会先执行该方法
     */
    @Before
    public void init() {
    
    
        System.out.println("init....");
    }

    /**
     * 释放资源方法，所有测试方法在执行完之后，都会执行该方法
     */
    @After
    public void close() {
    
    
        System.out.println("close...");
    }

    /**
     * 测试add方法
     */
    @Test
    public void testAdd() {
    
    
        System.out.println("我被执行了");
        Calculator calculator = new Calculator();
        int result = calculator.add(1, 2);
        System.out.println(result);
        //用断言操作来处理结构（逾期值,结果值）
        Assert.assertEquals(3, result);
    }
}

Fourth, download the plug-in to automatically generate test cases

After downloading Apply, ok

1. Setting:

Output path：
$SOURCEPATH/../test/${PACKAGE}/${FILENAME}

2. Create a new test folder equal to src under the module
3. Modify the coding problem
4. Modify the JUnit configuration file

5. Automatically generate test classes