Passing multiple json as a payload for a request in Gatling - scala

Question

sample json payload:
'{
"Stub1": "XXXXX",
"Stub2": "XXXXX-3047-4ed3-b73b-83fbcc0c2aa9",
"Code": "CodeX",
"people": [
{
"ID": "XXXXX-6425-EA11-A94A-A08CFDCA6C02"
"customer": {
"Id": 173,
"Account": 275,
"AFile": "tel"
},
"products": [
{
"product": 1,
"type": "A",
"stub1": "XXXXX-42E1-4A13-8190-20C2DE39C0A5",
"Stub2": "XXXXX-FC4F-41AB-92E7-A408E7F4C632",
"stub3": "XXXXX-A2B4-4ADF-96C5-8F3CDCF5821D",
"Stub4": "XXXXX-1948-4B3C-987F-B5EC4D6C2824"
},
{
"product": 2,
"type": "B",
"stub1": "XXXXX-42E1-4A13-8190-20C2DE39C0A5",
"Stub2": "XXXXX-FC4F-41AB-92E7-A408E7F4C632",
"stub3": "XXXXX-A2B4-4ADF-96C5-8F3CDCF5821D",
"Stub4": "XXXXX-1948-4B3C-987F-B5EC4D6C2824"
}
]
}
]
}'
I am working on a POST call. Is there any way to feed multiple json files as a payload in Gatling. I am using body(RawFileBody("file.json")) as json here.
This works fine for a single json file. I want to check response for multiple json files. Is there any way we can parametrize this and get response against multiple json files.

Answer 1

As far as I can see, there's a couple of ways you could do this.
Use a JSON feeder (https://gatling.io/docs/current/session/feeder#json-feeders). This would need your multiple JSON files to be in a single file, with the root element being a JSON array. Essentially you'd put the JSON objects you have inside an array inside a single JSON file
Create a Scala Iterator and have the names of the JSON files you're going to use in it. e.g:
val fileNames = Iterator("file1.json", "file2.json)
// and later, in your scenario
body(RawFileBody(fileNames.next())
Note that this method cannot be used across users, as the iterator will initialize separately for each user. You'd have to use repeat or something similar to send multiple files as a single user.
You could do something similar by maintaining the file names as a list inside Gatling's session variable, but this session would still not be shared between different users you inject into your scenario.