对用 xml 编写的 rest-API 进行单元测试

Question

我是 web 开发和 java 的新手。我已经使用 xml 开发了这个 rest-api，它运行良好（NetBeans）。但是，我需要对其进行单元测试。有人可以指导我吗？

提前致谢

@Path("/users")
public class users{
    String host=HelperClass.host;
    String uName=HelperClass.uName;
    String pass=HelperClass.pass;
    Connection con;

/**
 * Gets all the users in the database with the password.
 * @return
 * @throws SQLException 
 */
@GET
@Path("/getusers")
@Produces(MediaType.APPLICATION_XML)
public UserList getAllUsers() throws SQLException {
    UserList users;
    try
    {            
        con=DriverManager.getConnection(host, uName, pass);
        Statement stmt=con.createStatement();
        String Sql="SELECT * FROM USERS";
        ResultSet rs=stmt.executeQuery(Sql);
        users=new UserList();
        users.setUsers(new ArrayList<Users>());

        while(rs.next())
        {
            Users newuser=new Users();
            newuser.setUsername(rs.getString("username"));
            newuser.setPassword(rs.getString("password"));
            users.getUsers().add(newuser);

        }
    }
    catch(Exception ex)
    {
        users=new UserList();

    }
    finally
    {
        con.close();
    }
    return users;
}

/**
 * Gets the specific user in the database.
 * @param userId
 * @return
 * @throws SQLException 
 */
@GET
@Path("/getuser/{userId}")
@Produces(MediaType.APPLICATION_XML)
public Users getUser(@PathParam("userId") String userId) throws SQLException
{
    Users user;
    try
    {
        con=DriverManager.getConnection(host, uName, pass);
        Statement stmt=con.createStatement();
        String Sql="SELECT * FROM USERS where USERNAME='"+userId+"'";
        ResultSet rs=stmt.executeQuery(Sql);
        user=new Users();

         while(rs.next())
        {
            user.setUsername(rs.getString("username"));
            user.setPassword(rs.getString("password"));                
        }
    }
    catch(Exception ex)
    {
        user=new Users();
    }
    finally
    {
        con.close();
    }
    return user;
}

@POST
@Path("/setuser")
@Consumes({MediaType.APPLICATION_XML})
@Produces({MediaType.TEXT_PLAIN})
public String setUser(Users user) throws SQLException
{
    try
    {
        con=DriverManager.getConnection(host, uName, pass);
        Statement stmt=con.createStatement();
        String Sql="INSERT INTO USERS VALUES('"+user.getUsername()+"','"+user.getPassword()+"')";
        stmt.executeUpdate(Sql);
    }
    catch(Exception ex)
    {
        return "error";
    }
    finally
    {
        con.close();
    }
    return "done";
}

@DELETE
@Path("/deleteuser/{userId}")
@Produces({MediaType.TEXT_PLAIN})
public String deleteUser(@PathParam("userId") String userId) throws SQLException
{
    try
    {
        con=DriverManager.getConnection(host, uName, pass);
        Statement stmt=con.createStatement();            


        String Sql="Delete from replies where REPLY_ID='"+userId+"'";
        stmt.executeUpdate(Sql);

         Sql="Delete from comments where USER_ID='"+userId+"'";
        stmt.executeUpdate(Sql);

        Sql="Delete from USERINFO where USERINFO_ID='"+userId+"'";
        stmt.executeUpdate(Sql);



        Sql="Delete from USERS where USERNAME='"+userId+"'";
        stmt.executeUpdate(Sql);
    }
    catch(Exception ex)
    {
        return "error";
    }
    finally
    {
        con.close();
    }
    return "done";
}

}

Answer 1

有两种方法可以测试您的其余 API：

1> 直接调用你的 Junits 中的方法并验证结果

2> 使用 http GET/POST 方法调用您的 API 并验证响应。

使用 http get 方法调用 API，您可以参考以下示例：

String url = "http://www.google.com/search?q=httpClient";

HttpClient client = HttpClientBuilder.create().build();
HttpGet request = new HttpGet(url);

// add request header
request.addHeader("User-Agent", USER_AGENT);
HttpResponse response = client.execute(request);

System.out.println("Response Code : " 
            + response.getStatusLine().getStatusCode());

BufferedReader rd = new BufferedReader(
    new InputStreamReader(response.getEntity().getContent()));

StringBuffer result = new StringBuffer();
String line = "";
while ((line = rd.readLine()) != null) {
    result.append(line);
}

其他例子请看http://www.mkyong.com/java/apache-httpclient-examples/

谢谢。