CODEWITHSUNDEEP
performance-testinggatlingscala-gatlinggatling-plugin
Sean C
Sean C

Reputation: 1

Pass the values from one method to another method in gatling scala

I am working on a performance testing for an E2E scenario and There are 9 chain of requests.

In this 9 chain of request, I have two diff set of baseUrl.

Request1: baseUrl1/someUrlPath Request2: baseUrl2/someUrlPath Request3: baseUrl1/someUrlPath Request4: baseUrl1/someUrlPath Request5: baseUrl1/someUrlPath Request6: baseUrl2/someUrlPath . . . Request9: baseUrl1/someUrlPath

Each request is heavily dependent on the test data of previous request's response ( be it response session , some of the response value etc)

How to implement this E2E user journey in gatling scala?

Problems I am facing:

  1. If I am trying to build it in a single simulation class in gatling scala, two different base Url can not be mapped with one httpProtocol

  2. If I build separate httpProtocol, like below:

setUp( scn.inject(atOnceUsers(1)).protocols(httpProtocol), scn1.inject(atOnceUsers(1)).protocols(httpProtocolSim) ) then I can not transfer the values from a method A used in httpProtocol to another method B httpProtocolSim in the chain (as different session in different protocol)

Please let me know if anyone has any strategy or workaround.

Upvotes: 0

Views: 132

Answers (2)

Amerousful
Amerousful

Reputation: 2545

If you have a multiply base urls the best way is to provide an absolute path for each requests.
Instead of:

http("...")
 .get("/questions")

You ought to write a full path, which includes the protocol and, essentially, the base URL:

http("...")
 .get("https://stackoverflow.com/questions/")

Perhaps, in your scenario, a single base URL predominates. You could define it using http.baseUrl(...) and utilize a relative path in requests. However, for other base URLs, employ a full path."

Upvotes: 0

TriNguyen
TriNguyen

Reputation: 54

Let's say you have a response with this json Body:

{
   "Param1":{
      "ParA": "rand_value"
      }
}

As Gatling's document stated here you can perform a check and then extract a value as you want in response, a sample code written in Scala is below

    exec(
        http("name")
            .post("your target URL")
            .body(StringBody("""{your body here}"""))
            .check(jsonPath("$.Param1.ParA").saveAs("yourVarNameURL"))
      )

As the code block above, a request has been made with a validation check and extract was performed, thus the value is saved in virtual user session as "yourVarName" (holds rand_value). To understand more about virtual user session, see here.

When you successfully extract the value, and you want to pass that into next request, simply put as:

    exec(
        http("nameRequest")
            .post("#{yourVarNameURL}") //you passed the value rand_value in here
            .body(StringBody("""{your body here}"""))
      )

In this step, you called to VU session variable by using Gatling's EL #{yourVarName} note that this is different from language's string interpolation ${}, though they have the same effect. Then voila, you successfully passed the value into next action.

All these action are under one .protocols(httpconf), so when you say about Map, I am not sure what exactly your code block looks like to help further.

Return to your question:

If I am trying to build it in a single simulation class in gatling scala, two different base Url can not be mapped with one httpProtocol.

>>> you can have two different base URL with one httpProtocol, as shown in example above and in gatling's document.

Hope this help.

Upvotes: -1

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