Hello Postman team, We are using Postman to automate a broad number of requests. Sometimes we need to query an API programmatically, wait for its response, process it, and then proceed depending on what we have received. Most of the time these types of checks and requests are best made programmatic…

Update: As of Postman v10.6.7, this bug has been fixed, and the workaround is no longer required! If you’re interested in the technical details behind the fix, it was made in the open source postman-sandbox repo, available here: Support Promise execution in the sandbox. by kevinswiber · Pull Reques…

Hi @tmladenov_atos , Is this just about control flow aesthetics and avoiding “callback hell”? If so, you can use async/await style JavaScript syntax in the Postman Sandbox. It just requires a little hack. The Postman Sandbox detects open timeouts and intervals and awaits execution until they’re a…

Hi @kevin.swiber , You are absolutely correct, it’s all about flow control and avoiding the callback mess. :grimacing: Yesterday I’ve tried to use Promise, but I didn’t know about the trick on using timeouts and intervals, so the requests executed one after the other, async / await, but still, the…

Thanks @kevin.swiber , this solution was very useful in solving Issue #9715 . Apparently the second await never fired because the sandbox had already terminated by the time the first request was finished. This would also explain the strange behavior noted in Example 3 of that issue.

Thanks for this @kevin.swiber , Can I please ask a noob question? I’ve placed an assertion inside the main() function however it doesn’t seem to trigger Postman’s test failure. Is there a way to do this? Thank you (async function main() { const result1 = await sendRequest('http://postman-ec…

Hey @damiensawyer , Not a noob question at all! In fact, test failures are raised using JavaScript errors, and the Postman sandbox does not propagate errors that are thrown in this context. The method for taking advantage of async/await that’s outlined in the above post is a hack and workaround. …

Thanks @kevin.swiber , that’s helpful. I have to say, I’ve been diving deep into the Postman test tools for the first time. They’re amazing!

Thank you Sivcan, that’s great :slight_smile:

Executing sync requests programmatically from a pre-request or test scripts

Help Hub

singhsivcan (Sivcan Singh) May 31, 2021, 9:38pm 8

I recently wrote something that might just solve it for you - callbacks need to be used but still it just makes the job half-way easier with this IMO: Async Operations!

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Executing sync requests programmatically from a pre-request or test scripts

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