Postman——pre-request产生随机字符串和随机数字传给request body

产生随机数字
function GetRandomNum(Min,Max)
{   
    var Range = Max - Min;   
    var Rand = Math.random();   
    return(Min + Math.round(Rand * Range));   
} 
//产生随机字符串
function randomString(length, chars) {
    var result = '';
    for (var i = length; i > 0; --i) result += chars[Math.floor(Math.random() * chars.length)];
    return result;
}

  
var num = GetRandomNum(3,12); 
var roleId = GetRandomNum(1,2);
var rString = randomString(num, '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
console.log("username is : "+rString);
console.log("role is : "+roleId);
//设置环境变量
pm.environment.set("UserName", rString);
pm.environment.set("PassWord", rString);
pm.environment.set("Role",roleId);

首先，设置将要引用的变量设置为环境变量

然后，在pre-request中对环境变量修改

最后，在request body中引用即可