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                        /项目管理利器——maven

mvn test编译时程序包HelloWorld不存在

初次接触maven的小白还望老师多多指教。
 
mvn compile 测试通过 mvn test 未通过
mvn clean  compile  通过   mvn test 还是未通过

//路径：D:\maven_object\maven01\src\mian\java\com\imooc\maven01\model 
package com.imooc.maven01.model;
public class HelloWorld {     
 public String sayHello(){  
    return "Hello World!";   
       }   
 }

//路径：D:\maven_object\maven01\src\test\java\com\imooc\maven01\model
package com.imooc.maven01.model;import org.junit.*;
import org.junit.Assert.*;public class HelloWorldTest{   
     @Test   
      public void testHello(){ 
     Assert.assertEquals("Hello World!",new HelloWorld.sayHello()); 
        }  
    }

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">   
 <modelVersion>4.0.0</modelVersion> 
    <groupId>com.imooc.maven01</groupId> 
       <artifactId>maven01-model</artifactId>
           <version>0.0.1-SNAPSHOT</version>
               <dependencies>  
                     <dependency>      
                                 <groupId>junit</groupId>        
                                <artifactId>junit</artifactId>        
                              <version>4.10</version>   
                           </dependency>        
               </dependencies>   
      </project>