JUnit的配置及使用

一、安装插件JUnitGenertor V2.0

File->Setting->Plugins->在搜索框里输入JUintGenerator V2.0

二、导入JUnit相关jar包

1. junit-4.12.jar

2. hamcrest-core-1.3.jar

三、待测试类添加JUnit测试类

打开待测试类，按快捷键 ALT+INSERT，选择JUnit 4

四、编写测试代码

demo展示：

下面是一个单元测试驱动器，根据参数情况分别调用Servlet（待测试类）的方法来进行断言验证。

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import static org.junit.Assert.assertEquals;

/**
* Servlet Tester.
*
* @author <Authors name>
* @since <pre>四月 3, 2019</pre>
* @version 1.0
*/
@RunWith(Parameterized.class)
public class ServletTest {

    private Map<String, String> parameters;   // 定义参数映射集合
    private String result; // 预期结果
    @Parameterized.Parameters
    public static Collection data() {
        // 实例化参数映射集合，参数就是测试用例中的参数
        Map<String , String> parameters1 = new HashMap<String , String>(){{
            // 查询所有书籍模块参数
            put("name", "虚拟");
            put("msg", "");
        }};

        Map<String , String> parameters2 = new HashMap<String , String>(){{
            // 查询某个书籍详情模块参数
            put("id", "");
            put("msg", "");
        }};

        Map<String , String> parameters3 = new HashMap<String , String>(){{
            // 登陆模块参数
            put("name", "hey");
            put("password", "hey123");
            put("msg", "");
        }};

        Map<String , String> parameters4 = new HashMap<String , String>(){{
            // 借书参数
            put("id", "");
            put("msg", "");
        }};

        return Arrays.asList(new Object[][]{
                {"{\"address\":\"\",\"author\":\"周志明\",\"detail\":\"\",\"id\":1,\"name\":\"无法理解虚拟机\",\"press\":\"北京大出版社\",\"pressdate\":\"2019-03-06\",\"status\":\"\"}",parameters1},
                {"{\"address\":\"P0A1\",\"author\":\"\",\"detail\":\"很好\",\"id\":1,\"name\":\"无法理解虚拟机\",\"press\":\"\",\"pressdate\":\"\",\"status\":\"已出馆\"}",parameters2},
                {"",parameters3},
                {"",parameters4},
                });
    }

    public ServletTest(String result,Map<String, String> parameters) {
         this.parameters = parameters;  
         this.result = result; 
    }

@Before
public void before() throws Exception {
    System.out.println("开始测试....");

} 

@After
public void after() throws Exception {
} 

/**
*
* Method: doPost(HttpServletRequest request, HttpServletResponse  response)
*
*/
@Test
public void testDoPost() throws Exception {
    //TODO: Test goes here...
} 

/**
*
* Method: doGet(HttpServletRequest request, HttpServletResponse  response)
*
*/
@Test
public void testDoGet() throws Exception {
    assertEquals(result,sendPost(parameters));
}

public static String sendPost(Map<String, String> parameters) {

    String result = "";// 返回的结果
    BufferedReader in = null;// 读取响应输入流
    PrintWriter out = null;
    StringBuffer sb = new StringBuffer();// 处理请求参数
    String params = "";// 编码之后的参数
    try {
        // 编码请求参数
        if (parameters.size() == ) {
            for (String name : parameters.keySet()) {
                sb.append(name).append("=").append(
                        java.net.URLEncoder.encode(parameters.get(name),
                                "UTF-8"));
            }
            params = sb.toString();
        } else {
            for (String name : parameters.keySet()) {
                sb.append(name).append("=").append(
                        java.net.URLEncoder.encode(parameters.get(name),
                                "UTF-8")).append("&");
            }
            String temp_params = sb.toString();
            params = temp_params.substring(, temp_params.length() - );
        }

        String url = "http://localhost:8080/Servlet";
        // 创建URL对象
        java.net.URL connURL = new java.net.URL(url);
        // 打开URL连接
        java.net.HttpURLConnection httpConn = (java.net.HttpURLConnection) connURL
                .openConnection();
        // 设置通用属性
        httpConn.setRequestProperty("Accept", "*/*");
        httpConn.setRequestProperty("Connection", "Keep-Alive");
        httpConn.setRequestProperty("User-Agent",
                "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");
        // 设置POST方式
        httpConn.setDoInput(true);
        httpConn.setDoOutput(true);
        // 获取HttpURLConnection对象对应的输出流
        out = new PrintWriter(httpConn.getOutputStream());
        // 发送请求参数
        out.write(params);
        // flush输出流的缓冲
        out.flush();
        // 定义BufferedReader输入流来读取URL的响应，设置编码方式
        in = new BufferedReader(new InputStreamReader(httpConn
                .getInputStream(), "UTF-8"));
        String line;

        // 读取返回的内容
        while ((line = in.readLine()) != null) {
            result += line;
        }

    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (out != null) {
                out.close();
            }
            if (in != null) {
                in.close();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
    return result;
}

}