How to get dynamic and adaptive timestamp variable in Postman? - date

Question

What i need to do is to generate few timestamps: timeNow, +1y ahead and +5years ahead and few other random dates. All that needs to happen in "Pre-request Script" for Postman API testing where rRequired format is: YYYY-MM-DDTHH:mm:ss.mssZ which in practice needs to like like 2021-02-24T12:05:35.423Z
First of all, when i'm trying to use {{$isoTimestamp}} dynamic variable it's not doing nothing which is already frustrating.
Secondly, I've managed to manually create a 'now' date and then concatenated that with 'Z' which already looks like ****
const moment = require('moment');
let eventDate = moment().format("YYYY-MM-DDTHH:mm:ss.ms);
let eventDateTime = eventDate + "Z";
So, that gives me time format (the string, actually) I wanted but does not provide any possibility to get those random dates, now+1year and now+5years. I'm kinda new to that so it's breaking my balls, really. Anyone has any idea, pretty please?

Answer 1

you can get dynamic variables in postman script sessions as :
console.log(pm.variables.replaceIn("{{$isoTimestamp}}"))
you should use replaceIn
Also to add something to date use something like:
if your start time is in the format YYYY-MM-DDTHH:MM:ss.SSSZ , then use:
const moment = require('moment');
if (pm.info.iteration === 0) {
pm.collectionVariables.set("startTime", moment.utc())
} else {
let measuredOnUtc = pm.collectionVariables.get("startTime")
measuredOnUtc = moment(measuredOnUtc)
pm.collectionVariables.set("startTime", measuredOnUtc.add(3, 'hours').utc())
}
if startime is in format DD-MM-YYYYTHH:MM:ss.SSS[Z] , then use:
const moment = require('moment');
if (pm.info.iteration === 0) {
pm.collectionVariables.set("startTime", moment.utc().format("DD-MM-YYYYTHH:MM:ss.SSS[Z]"))
} else {
let measuredOnUtc = pm.collectionVariables.get("startTime")
measuredOnUtc = moment(measuredOnUtc, "DD-MM-YYYYTHH:MM:ss.SSS[Z]")
pm.collectionVariables.set("startTime", measuredOnUtc.add(3, 'hours').format("DD-MM-YYYYTHH:MM:ss.SSS[Z]"))
}
THe request body should be :slight_smile:
{
bbla:bla,
"startTime": "{{startTime}}",
bbla:bla
}