Loop over multiple response matches from previous request in Gatling / Scala
Question
I'm still pretty new to Gatling / Scala, so my apologies if I've misunderstood something obvious, but...
I have a scenario with a sequence of requests. One of them is along the lines of:
.exec (
http("Get IDs")
.post(<urlpath>)
.body(<body text>)
.headers(<headerinfo>)
.check(jsonPath("$[*].some.json.path").findAll.transform(_.map(_.replace("unwantedchars,""))).saveAs(myIds)
)
And that works fine, returning a vector of all matching json elements, with the unwanted chars removed. What I'm trying to do next is loop over the first 5 ids, and pass them into the next request. I've tried assorted variants of the following, but no amount of variation / googling has returned the actual solution:
.exec( session => {
val firstFive = session("myIds").as[Vector[String]].toArray.take(5)
for (inx <- 0 until 4){
exec(
http("get the item")
.get("/path/to/item/thing/" + firstFive(inx))
.headers(<etc etc>)
)
session
})
So I understand nested exec's aren't supported - but how can I create a block that combines the for-loop, and the actual HTTP requests?
Am I missing something obvious?
1 answers
solution1
0 ACCPTED 2019-11-27 02:46:48
if you're looking to take 5, then you just need to put them in the session and then process them with a .foreach block.
so instead of taking the first five and trying to make exec calls (which, as you observed, won't work), save the list back to the session
.exec( session => {
val firstFive = session("myIds").as[Vector[String]].take(5)
session.set("firstFive", firstFive)
)
then use the DSL to loop through the collection
.foreach("${firstFive}", "id") {
exec(
http("get the item")
.get("/path/to/item/thing/${id}")
.headers(<etc etc>)
)
}
you could even add the selection of the first five to your transform step - so the whole thing could be...
.exec (
http("Get IDs")
.post(<urlpath>)
.body(<body text>)
.headers(<headerinfo>) .check(jsonPath("$[*].some.json.path").findAll.transform(_.map(_.replace("unwantedchars,"")).take(5).saveAs(myIds)
)
.foreach("${myIds}", "id") {
exec(
http("get the item")
.get("/path/to/item/thing/${id}")
.headers(<etc etc>)
)
}
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