实例演练

定义User类，封装account和password属性，提供getter/setter，重载构造方法，重写toString()方法
1、定义UserLogin类，封装User属性，提供getter/setter，并定义public boolean userLogin(User user)；方法，判定某个用户能否登陆成功，指定账号为“admin”，密码为“111”
2、写配置文件，通过构造器注入创建一个User对象并传值，通过setter注入创建UserLogin对象并传值
3、 写单元测试，测试某用户能否登陆成功

一、添加依赖

在porm.xml文件中添加依赖：在porm.xml文件中添加依赖：

<dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.12</version>
          <scope>test</scope>
      </dependency>
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-test</artifactId>
          <version>${spring.version}</version>
      </dependency>

二、编写待测程序

User类：

package com.spring.IoC;
public class User {
    private String account;
    private String password; //封装属性
public User(String account, String password) {
        this.account = account;
        this.password = password;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
   public String getAccount() {
        return account;
    }
   public void setAccount(String account) {
        this.account = account;
    }
   public User() {
 }
  @Override
    public String toString() {
        return "User{" +
                "account='" + account + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

UserLoginTest类:

package com.spring.IoC;
public class UserLogin {
    private User user;
    public User getUser() {
        return user;
    }
    public void setUser(User user) {
        this.user = user;
    }
    public boolean userLogin(User user){
        boolean flag=false;
        if(user.getAccount().equals("admin")&&
                user.getPassword().equals("111")){
         flag=true;  
        }
        return flag;
    } //判断账户和密码是否正确
}

Spring.xml类

<bean id="user" class="com.spring.IoC.User">
    <constructor-arg name="account" value="admin"></constructor-arg>
    <constructor-arg name="password" value="111"></constructor-arg>
</bean>   //通过构造器传值

<bean id="userLogin" class="com.spring.IoC.UserLogin">
    <property name="user" ref="user"></property>
</bean>  //通过setter传值

三、编写单元测试程序

• 选中要测试类的类名，并按alt+enter键

  image
  image

  测试类内容如下：

package com.spring.IoC;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import static org.junit.Assert.*;

//指定单元测试环境
@RunWith(SpringJUnit4ClassRunner.class)
//指定配置文件路径
@ContextConfiguration(locations={"/spring.xml"})

public class UserLoginTest {
    //  自动注入
    @Autowired
    private UserLogin userlogin;
    @Test
    public void userLogin() throws Exception{
        assertEquals(true,userlogin.userLogin(userlogin.getUser()));
    }
}

运行结果：

image