Java - edit variable received in JSON

Gatling (Open-Source)
1

I’ve got a test in Java.

I send a request to server and receive the response in JSON format.
Then I would like to edit this variable - add some things or remove, change and then use the result in another request. I know that I can use .saveAs method to save the variable but how to edit this variable for the future use in next requests? Is there any possibility to edit the variable between the requests?

2

Hi,
An example of how you can do this using Map below:

package pl.gemiusz;

import io.gatling.javaapi.core.ScenarioBuilder;
import io.gatling.javaapi.core.Session;
import io.gatling.javaapi.core.Simulation;
import io.gatling.javaapi.http.HttpProtocolBuilder;

import java.util.Map;

import static io.gatling.javaapi.core.CoreDsl.*;
import static io.gatling.javaapi.http.HttpDsl.http;

public class Case0010JsonEditVariableSimulation extends Simulation {

    HttpProtocolBuilder httpProtocol =
            http
                    .baseUrl("https://postman-echo.com");
    ScenarioBuilder scn =
            scenario("GeMi_JsonEditVariableSimulation")
                    .exec(
                            http("GeMi_JsonEditVariableSimulation_post")
                                    .post("/post")
                                    .body(StringBody("{\"status\":\"GOOD\",\"fruit\":\"Apple\"}"))
                                    .asJson()
                                    .check(
                                            jmesPath("json")
                                                    .ofObject()
                                                    .is(
                                                            Map.of("status", "GOOD",
                                                                    "fruit", "Apple"
                                                            )
                                                    )
                                                    .saveAs("GeMi_Obj")
                                    )
                    ).exec(session -> {
                        System.out.println("GeMi_Obj: " + session.get("GeMi_Obj").toString());
                        Map<String, Object> gemiObj = session.get("GeMi_Obj");
                        //changing value from GOOD to BAD
                        gemiObj.put("status", "BAD");
                        Session sessionGeMiObj = session.set("changed_GeMi_Obj", gemiObj);
                        return sessionGeMiObj;
                    }).exec(
                            http("GeMi_JsonEditVariableSimulation_post_changed")
                                    .post("/post")
                                    .body(StringBody("#{changed_GeMi_Obj.jsonStringify()}"))
                                    .asJson()
                                    .check(
                                            jmesPath("json")
                                                    .ofObject()
                                                    .is(
                                                            Map.of("status", "BAD",
                                                                    "fruit", "Apple"
                                                            )
                                                    )
                                                    .saveAs("GeMi_Obj_aftter_change")
                                    )
                    ).exec(session -> {
                        System.out.println("GeMi_Obj_aftter_change: " + session.get("GeMi_Obj_aftter_change").toString());
                        return session;
                    });

    {
        setUp(scn.injectOpen(atOnceUsers(1)).protocols(httpProtocol));
    }
}