Json处理(JS)
对于Json字符串,需要使用单引号『''』(因为Json中已存在双引号)
// String转为Object
var jsonObj = JSON.parse('${data}');
// Object转为String
var jsonStr = JSON.stringify(jsonObj);
// 获取数组长度(直接通过length)
var len = obj.list.length;
获取当前Sample返回值,并转为Json
var response = prev.getResponseDataAsString();
var mData = JSON.parse(response);
缓存
存在一个默认勾选项:『如果可用,缓存编译脚本』,勾选后,不仅是脚本被缓存,其中的数据也会被缓存而不会更新(包括变量),如:
// 此处的${api}会编译为String,然后每次解析的都会是首次传入的变量
var jsonObj = JSON.parse('${api}');
vars.put("_id",jsonObj._id);
移除变量
vars.remove("data");
生成随机时间
通过组合使用Jmeter函数助手:__timeShift和__Random
# 使用:"${__timeShift(yyyy-MM-dd HH:mm:ss,,-PT${__Random(1,30000,)}H${__Random(1,300,)}M,,)}"
其中__timeShift的用法:
"PT20.345S" -- parses as "20.345 seconds"
"PT15M" -- parses as "15 minutes" (where a minute is 60 seconds)
"PT10H" -- parses as "10 hours" (where an hour is 3600 seconds)
"P2D" -- parses as "2 days" (where a day is 24 hours or 86400 seconds)
"P2DT3H4M" -- parses as "2 days, 3 hours and 4 minutes"
"P-6H3M" -- parses as "-6 hours and +3 minutes"
"-P6H3M" -- parses as "-6 hours and -3 minutes"
"-P-6H+3M" -- parses as "+6 hours and -3 minutes"
注意:使用H,M,S时,必须有T,T出现在H,M,S前,D后,如:P2DT3H4M。如没有D,则在P后,如:-PT6H3M。参考:https://docs.oracle.com/javase/8/docs/api/java/time/Duration.html#parse-java.lang.CharSequence-
数组取随机index
var temp = ["1","2","3","4","5"];
temp[Math.floor((Math.random()*temp.length))];
判断字符串是否包含(JS)
"${__V(title,)}".indexOf("测试") != -1
当变量不存在时,才设置变量(JS)
// 一般只适用于host及登录,否则有坑:如果在后续使用中需要修改该参数,则该方法无效
function setDefaultVar(varName,value){
if (vars.get(varName) == null) {
log.info("--------------- "+varName+" is not set, use: "+ value +" ---------------")
vars.put(varName, value);
}
}
获取任意范围内随机整数
// 随机获取范围内的整数
function random(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
};
从数组中随机选择一个
// 从数组中,随机选择一个
function randomChooice(array){
return array[Math.floor(Math.random() * array.length)];
}
从对象中随机选择key(typescript代码,需转为JS才能在Jmeter使用)
private randomKeyInObject(obj: { [k: string]: string }) {
let keys = Object.keys(obj)
let randomIndex = Math.floor(Math.random() * keys.length);
return keys[randomIndex];
}
把数组设置为X个单独变量
// 把数组设置为X个单独变量
function arrayToVars(prefixKey, array) {
for (var index = 0; index < array.length; index++) {
var key = prefixKey + "_" + (index + 1);
vars.put(key, array[index]);
}
}
使用自己的『四舍五入』方法
// 修改toFixe,在Jmeter中非常不友好所以使用自己的方法
function toFixed(num, len) {
if (len === void 0) { len = 2;}
// Jmeter中不能使用:Number.EPSILON(ES6才出来)
return Math.round((Number(num) + 2.2204460492503130808472633361816E-16) * Math.pow(10, len)) / Math.pow(10, len);
}
AssertionResult封装
// 断言是否相等(数字与字符类型分别处理)
function assertEqual(expect, actual, errorMsg) {
var numberReg=/^-?[0-9]+.?[0-9]*$/;
if(numberReg.test(expect) && numberReg.test(actual)){
if (Number(expect) != Number(actual)) {
AssertionResult.setResultForFailure(errorMsg + ":" + " ,expect: " + expect + " , but got: " + actual);
}
}else {
if (expect != actual) {
AssertionResult.setResultForFailure(errorMsg + ":" + " ,expect: " + expect + " , but got: " + actual);
}
}
}
获取默认变量
// 获取变量,如没有,则返回:defaultValue
function getVarWithDefault(varName,defaultValue){
var theVar = vars.get(varName);
if(theVar == null){
theVar = defaultValue;
}
return theVar;
}
Loop循环中获取子变量
// Loop循环中获取子变量,需配合计数器使用,loopFlag为计数器的引用名称,默认为index
function getSubVarInLoop(prefix, loopFlag) {
if (loopFlag === void 0) loopFlag = "index";
var key = prefix + "_" + vars.get(loopFlag);
return vars.get(key);
}
解决JavaScript浮点数相加出现多位小数的Bug
// 解决JavaScript浮点数相加出现多位小数的Bug
function toDecimal(x) {
var val = Number(x)
if (!isNaN(parseFloat(val))) {
val = val.toFixed(2);
}
return val;
}
修改toFixed为『四舍五入』,而不是『四舍六入五留双』
Number.prototype.toFixed = function (len) {
if (len > 20 || len < 0) {
throw new RangeError('toFixed() digits argument must be between 0 and 20');
}
// .123转为0.123
var number = Number(this);
if (isNaN(number) || number >= Math.pow(10, 21)) {
return number.toString();
}
if (typeof (len) == 'undefined' || len == 0) {
return (Math.round(number)).toString();
}
var result = number.toString(),
numberArr = result.split('.');
if (numberArr.length < 2) {
//整数的情况
return padNum(result);
}
var intNum = numberArr[0], //整数部分
deciNum = numberArr[1],//小数部分
lastNum = deciNum.substr(len, 1);//最后一个数字
if (deciNum.length == len) {
//需要截取的长度等于当前长度
return result;
}
if (deciNum.length < len) {
//需要截取的长度大于当前长度 1.3.toFixed(2)
return padNum(result)
}
//需要截取的长度小于当前长度,需要判断最后一位数字
result = intNum + '.' + deciNum.substr(0, len);
if (parseInt(lastNum, 10) >= 5) {
//最后一位数字大于5,要进位
var times = Math.pow(10, len); //需要放大的倍数
var changedInt = Number(result.replace('.', ''));//截取后转为整数
var fu = 1/changedInt < 0;// 为true 时,则 changedInt < 0 或者 changedInt = -0,否则为正数或等于0
if(fu){
changedInt--;//整数进位
}else{
changedInt++;//整数进位
}
changedInt /= times;//整数转为小数,注:有可能还是整数
result = padNum(changedInt + '');
}
return result;
//对数字末尾加0
function padNum(num) {
var dotPos = num.indexOf('.');
if (dotPos === -1) {
//整数的情况
num += '.';
for (var i = 0; i < len; i++) {
num += '0';
}
return num;
} else {
//小数的情况
var need = len - (num.length - dotPos - 1);
for (var j = 0; j < need; j++) {
num += '0';
}
return num;
}
}
};
在string中去除某string
# 在toBeDelete(string)中去除deleteWhat(string)
function deleteString(toBeDelete, deleteWhat, splitChar) {
var toBeDelete = toBeDelete.split(",");
var deleteWhat = deleteWhat.split(",");
for (var i = 0; i < toBeDelete.length; i++) {
for (var j = 0; j < deleteWhat.length; j++) {
if (deleteWhat[j] === toBeDelete[i]) {
var temp = toBeDelete.splice(i--, 1);
log.info("delete string: " + temp);
}
}
}
return toBeDelete.join(splitChar);
}
var result = deleteString("1,42,12,33,6,642,118", "42,36,118,62,27,12,53", ",");
console.log(result);
生成范围内的随机日期
// 范围内的随机日期,不带时分秒
function randomDate(startDate,EndDate){
var st = startDate.split('-');
var et = EndDate.split('-');
var startTime = new Date(st[0], st[1] - 1, st[2]).getTime();
var endTime = new Date(et[0], et[1] - 1, et[2]).getTime();
var formatTime = function(time, spliter = '-') {
var date = new Date(time);
var year = date.getFullYear();
var month = (date.getMonth() + 1) >= 10 ? (date.getMonth() + 1) : '0' + (date.getMonth() + 1);
var day = date.getDate() >= 10 ? date.getDate() : '0' + date.getDate();
return `${year}${spliter}${month}${spliter}${day}`
}
var random = function(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
};
i = random(startTime,endTime);
var result = formatTime(i, '')
return result;
}