Extracting Conditional Response Values

Gatling (Open-Source)
1

Hi Stéphane,

First, I just wanted to say how much I loved Gatling!

Suppose one needed to save into the session, for later execution branching, values which might not always be present.

For instance, given a JSON response such as:

{success=“true”}

It’s easy to extract and save. But suppose we could also get a response like this:

{success=“false”; error_code=123}

We’d like to branch chains based on the value of error_code. But checking for it directly will give us a KO (if some simulations got success=true), even if this is expected, and we succeed on the branch we take.

I take it the correct approach would be to do something like

def xformMaybeV : Option[V]

check(bodyString.transform(xform)).saveAs(“maybeValue”)

Note, this is for 2.0. Also, gatling works very nicely as a library–I’m sure many people would love to use it for functional testing.

Thanks,

kirstin

2

Hi,

Thanks for you kind words.

Actually, that’s something you already have, even in Gatling 1, see step named “whatever” in Check API:
https://github.com/excilys/gatling/wiki/Checks#wiki-whatever

(beware that it has been renamed into “dontValidate” in next Gatling 2 milestone.

So:

  • have a check (JsonPath is probably the best solution for your use case) on error_code
  • then, you can branch with a “doIf(_.contains(“error_code”))”
    Cheers,

Stéphane