Data Generation Scripts

Document created by Chris Sommerstad Employee on Jul 22, 2017
Version 1Show Document
  • View in full screen mode

This topic presents a variety of SOASTA CloudTest data generation scripts. Scripts can be copied and pasted directly into the SOASTA CloudTest Script Editor using Central > Scripts. Longer scripts have an accompanying image that can be clicked to pop out the full example s ript. Shorter scripts are presented inline (in the right column).

  1. Script 1: Random number/string generator

The Random number/string generator script will generate a random number and place it into a test clip.

  1. The function to the right generates a random integer (whole number) contained within the two extremes (inclusive on lower extreme, exclusive on upper).

function generateRandomNumber(lowerExtreme, upperExtreme) {
return Math.floor(Math.random() * (upperExtreme - lowerExtreme) + lowerExtreme);

For example, generate a random number, either 1, 2, or 3:

var num = "" + generateRandomNumber(1,4);

Generate a random number either 5, 6 or 7:

var num = "" + generateRandomNumber(5,8);

Generate a random string of the given length using alpha- numerics (upper and lower case).

var ranString = generateRandomString(5);

The next example generates a random string of five characters in length, such as: "udG6Z"

function generateRandomString(stringLength) {
var pool =
var poolLength = pool.length;

var randomString = [];

for (var ndx = 0; ndx < stringLength; ndx++)
randomString[randomString.length] =
pool.charAt(generateRandomNumber(0, poolLength));

return randomString.join("");

  1. Script 2: Generate a random number of 7 or 8 digits

The Random number/string generator with seven-eight characters script will generate a random number with seven or eight characters and place it into a test clip.

Lines 1-3 create a function to generate a random number.

function generateRandomNumber(lowerExtreme, upperExtreme) {
return Math.floor(Math.random() * (upperExtreme - lowerExtreme) + lowerExtreme);

Line 5 creates a variable, num, to store the random number, which will contain seven to eight characters.

var num = "" + generateRandomNumber(1000000,99999999);

Lines 7-8 place the random number into the current test clip context as a property.

$context.result.postMessage($context.result.LEVEL_INFO, "Random rUID: " + num);
$prop.set("MessageClip", "rUID", num);

  1. Script 3: Using properties to generate unique data

This simple script uses properties to generate unique data:

{%%Sys-Prop:Composition:StartTimeMillis%%}-{%%Sys-Prop:Track:VUNumber%%}-{%% expr: $context.currentClipIndex %%}

  1. Script 4: : Generate guaranteed unique numbers based on a timestamp

This simple script guarantees unique number generation based on a timestamp:

var vus = new Number($context.currentTrack.systemPropertyList.getPropertyValue("VUNumber"));
var startTimeMilis = new Date().getTime();
var clipIndex = $context.currentClipIndex;

if(-1 == clipIndex)
  clipIndex = 0;

var uniqueNumber = vus+"-"+startTimeMilis+"-"+clipIndex; 
//var uniqueNumber = "0";

$context.result.postMessage($context.result.LEVEL_INFO, "uniqueNumber = "+uniqueNumber); 

$prop.set("MessageClip", "userNum", uniqueNumber);