Junit使用

首先需要jar包

http://mvnrepository.com/artifact/junit/junit/4.12

 

在IDEA使用的话 把原有的功能进行测试

//判读字符串第一个不重复的字符
    @Override
    public char getStr(String str) {
        //indexOf();lastIndexOf();
        if (str == null || str.length() == 0 || str.equals("") || str.trim().isEmpty()) {
            return 0;
        }
        Map<Character, Integer> counts = new LinkedHashMap<Character, Integer>(
                str.length());
        for (char c : str.toCharArray()) {
            counts.put(c, counts.containsKey(c) ? counts.get(c) + 1 : 1);
        }
        for (Map.Entry<Character, Integer> entry : counts.entrySet()) {
            if (entry.getValue() == 1) {
                return entry.getKey();
            }
        }
        return 0;
    }
    //随机字符串
    @Override
    public String getRandStr(int length) {
        //定义一个字符串（A-Z，a-z，0-9）即62位；
        String str = "zxcvbnmlkjhgfdsaqwertyuiopQWERTYUIOPASDFGHJKLZXCVBNM1234567890";
        //由Random生成随机数
        Random random = new Random();
        StringBuilder sb = new StringBuilder();
        //长度为几就循环几次
        for (int i = 0; i < length; ++i) {
            //产生0-61的数字
            int number = random.nextInt(62);
            //将产生的数字通过length次承载到sb中
            sb.append(str.charAt(number));
        }
        //将承载的字符转换成字符串
        return sb.toString();
    }

如何使用Junit进行测试呢？

快捷键Ctrl + Shift + T

选择create

购选所需方法就可以了

需要选择Junit

即可运行测试

绿色说明通过

 

 需要测试的方法

package Test;

public class StringUtilImpl implements StringUtil {
    //Rot13加密解密
    @Override
    public String getRot13(String str) {
        if (str == null || str.length() == 0 || str.equals("") || str.trim().isEmpty()) {
            return null;
        } else {
            char[] chr = str.toCharArray();
            StringBuffer buffer =new StringBuffer();
            for (int i = 0; i < chr.length; i++) {
                if ((chr[i] >= 'A') && (chr[i] <= 'Z')) {
                    chr[i] += 13;
                    if (chr[i] > 'Z') {
                        chr[i] -= 26;
                    }
                } else if ((chr[i] >= 'a') && (chr[i] <= 'z')) {
                    chr[i] += 13;
                    if (chr[i] > 'z') {
                        chr[i] -= 26;
                    }
                }else if((chr[i] >= '0') && (chr[i] <= '9')){
                   chr[i] +=5;
                   if(chr[i] > '9'){
                       chr[i] -= 10;
                   }
               }
                // and return it to sender
                buffer.append(chr[i]);
            }
            return buffer.toString();
        }
    }
    //字符串翻转
    @Override
    public String getReverse(String str) {
        if (str == null || str.length()==0 || str.equals("") || str.trim().isEmpty()) {
            return null;
        }
        char[] arr = str.toCharArray();
        String reverse = "";
        for (int i = arr.length - 1; i >= 0; i--) {
            reverse += arr[i];
        }
        return reverse;
    }
    //判读字符串是否为空
    @Override
    public boolean getIsEmpty(String str) {
        if (str == null || str.length()==0 || "".equals(str) || str.trim().isEmpty()) {
            return true;
        }
        return false;
    }
}

测试类

package DemoJunit;

import Test.StringUtilImpl;
import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Test;
import Test.*;

import static org.junit.Assert.*;

public class StringUtilImplTest {
    StringUtil s = new StringUtilImpl();

    @Test
    //@Ignore("该客户没有给钱不给他密码加密所以给他挖个坑...")
    public void getRot13() {
        Assert.assertEquals(s.getRot13("abc大Das是的3"), "nop大Qnf是的8");
        Assert.assertEquals(s.getRot13("ynxsfy"), "lakfsl");
        Assert.assertEquals(s.getRot13("I'm from guangdong"), "V'z sebz thnatqbat");
        Assert.assertEquals(s.getRot13("StringUtil"), "FgevatHgvy");
        Assert.assertEquals(s.getRot13("  "), null);
        Assert.assertEquals(s.getRot13(null), null);
    }

    @Test
    public void getReverse() {
        Assert.assertEquals(s.getReverse("are you ok?"), "?ko uoy era");
        Assert.assertEquals(s.getReverse("I me here"), "ereh em I");
        Assert.assertEquals(s.getReverse(""), null);
        Assert.assertEquals(s.getReverse(null), null);
    }

    @Test
    public void getIsEmpty() {
        String str = "";
        Assert.assertEquals(s.getIsEmpty(null), true);
        Assert.assertEquals(s.getIsEmpty("   "), true);
        Assert.assertEquals(s.getIsEmpty(""), true);
        Assert.assertEquals(s.getIsEmpty(str), true);
        Assert.assertEquals(s.getIsEmpty("GG"), false);
    }
}

 

 下面来介绍 Maven项目SSM结合Junit

这里无需添加架包在使用Maven项目字段配置好Junit

在项目的src根目录下面创建一个Test文件夹

然后点击右键选择

然后文件夹就会变绿色了

使用：

在service选择需要测试的方法然后会自动在Test文件下面生成测试类；

 

代码：

package com.gdnf.ssm.service;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.log4j.spi.LoggerFactory;
import org.junit.*;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import  org.apache.log4j.*;

import java.util.logging.Logger;

import static org.junit.Assert.*;

public class BookServiceImplTest {
    static ClassPathXmlApplicationContext context;
    static Log logger ;

    @BeforeClass
    public static void init() {
        context = new ClassPathXmlApplicationContext("spring_root.xml");
        logger = LogFactory.getLog("");
    }

    @AfterClass
    public static void after() {
        logger.info("结束了");
    }
    //@Ignore
    @Test
    public void getCount() {
        BookService bean = context.getBean(BookService.class);
        logger.info(bean.getCount());
        logger.info(bean.getBookAll());
    }
}

结果

这里配置的Log4j是输出到控制台

"C:\Program Files\Java\jdk1.8.0_181\bin\java" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:D:\二学年\工具包\idea文件\IntelliJ IDEA 2017.3.5\lib\idea_rt.jar=64358:D:\二学年\工具包\idea文件\IntelliJ IDEA 2017.3.5\bin" -Dfile.encoding=UTF-8 -classpath "D:\二学年\工具包\idea文件\IntelliJ IDEA 2017.3.5\lib\idea_rt.jar;D:\二学年\工具包\idea文件\IntelliJ IDEA 2017.3.5\plugins\junit\lib\junit-rt.jar;D:\二学年\工具包\idea文件\IntelliJ IDEA 2017.3.5\plugins\junit\lib\junit5-rt.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_181\jre\lib\rt.jar;D:\二学年\学习项目\my_ssm\target\test-classes;D:\二学年\学习项目\my_ssm\target\classes;C:\Users\DZ\.m2\repository\junit\junit\4.12\junit-4.12.jar;C:\Users\DZ\.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-web\5.1.0.RELEASE\spring-web-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-beans\5.1.0.RELEASE\spring-beans-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-core\5.1.0.RELEASE\spring-core-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-jcl\5.1.0.RELEASE\spring-jcl-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-aop\5.1.0.RELEASE\spring-aop-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-jdbc\5.1.0.RELEASE\spring-jdbc-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-tx\5.1.0.RELEASE\spring-tx-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-webmvc\5.1.0.RELEASE\spring-webmvc-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-context\5.1.0.RELEASE\spring-context-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\springframework\spring-expression\5.1.0.RELEASE\spring-expression-5.1.0.RELEASE.jar;C:\Users\DZ\.m2\repository\org\mybatis\mybatis\3.4.6\mybatis-3.4.6.jar;C:\Users\DZ\.m2\repository\org\mybatis\mybatis-spring\1.3.2\mybatis-spring-1.3.2.jar;C:\Users\DZ\.m2\repository\org\mariadb\jdbc\mariadb-java-client\2.3.0\mariadb-java-client-2.3.0.jar;C:\Users\DZ\.m2\repository\com\mchange\c3p0\0.9.5.2\c3p0-0.9.5.2.jar;C:\Users\DZ\.m2\repository\com\mchange\mchange-commons-java\0.2.11\mchange-commons-java-0.2.11.jar;C:\Users\DZ\.m2\repository\javax\servlet\jstl\1.2\jstl-1.2.jar;C:\Users\DZ\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.9.7\jackson-databind-2.9.7.jar;C:\Users\DZ\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.9.0\jackson-annotations-2.9.0.jar;C:\Users\DZ\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.9.7\jackson-core-2.9.7.jar;C:\Users\DZ\.m2\repository\log4j\log4j\1.2.17\log4j-1.2.17.jar" com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 -junit4 com.gdnf.ssm.service.BookServiceImplTest
DEBUG [main] - ==>  Preparing: select count(name) from book 
DEBUG [main] - ==> Parameters: 
DEBUG [main] - <==      Total: 1
九月 30, 2018 2:23:59 下午 com.gdnf.ssm.service.BookServiceImplTest getCount
信息: 10
DEBUG [main] - ==>  Preparing: select * from book 
DEBUG [main] - ==> Parameters: 
DEBUG [main] - <==      Total: 10
九月 30, 2018 2:23:59 下午 com.gdnf.ssm.service.BookServiceImplTest getCount
信息: [Book{id=1, name='干法', cnt=25}, Book{id=2, name='Java程序设计', cnt=8}, Book{id=7, name='哲学', cnt=0}, Book{id=8, name='小说', cnt=13}, Book{id=9, name='啊哈哈', cnt=13}, Book{id=10, name='cc', cnt=11}, Book{id=11, name='卓悦', cnt=57}, Book{id=12, name='他们最幸福', cnt=1}, Book{id=13, name='admin', cnt=123456789}, Book{id=14, name='我不', cnt=6}]
九月 30, 2018 2:23:59 下午 com.gdnf.ssm.service.BookServiceImplTest after
信息: 结束了

Process finished with exit code 0

 

 

package com.gdnf.ssm.service;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.log4j.spi.LoggerFactory;
import org.junit.*;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import  org.apache.log4j.*;

import java.util.logging.Logger;

import static org.junit.Assert.*;

public class BookServiceImplTest {
    static ClassPathXmlApplicationContext context;
    static Log logger ;

    @BeforeClass
public static void init() {
        context = new ClassPathXmlApplicationContext("spring_root.xml");
        logger = LogFactory.getLog("");
    }

    @AfterClass
public static void after() {
        logger.info("结束了");
    }
    //@Ignore
@Test
public void getCount() {
        BookService bean = context.getBean(BookService.class);
        logger.info(bean.getCount());
        logger.info(bean.getBookAll());
    }
}