How to execute single scenario out of multiple scenarios in a script?

Grafana k6 OSS Support
1

I have a script with multiple scenarios. Each scenario does CRUD operations on a unique content type. I would like to reuse same script to run all scenarios at same time or single scenario as the need be. How to achieve this?

2

Yes, you can easily do this with k6 environment variables, like this:

import http from 'k6/http';

let scenarios = {
    contacts: {
        executor: 'constant-vus',
        exec: 'contacts',
        vus: 50,
        duration: '30s',
    },
    news: {
        executor: 'per-vu-iterations',
        exec: 'news',
        vus: 50,
        iterations: 100,
        maxDuration: '1m',
    },
};

export let options = {
    scenarios: {}, // to be set later
    // ... whatever other script options you have
}

if (__ENV.scenario) {
    // Use just a single scenario if `--env scenario=whatever` is used
    options.scenarios[__ENV.scenario] = scenarios[__ENV.scenario];
} else {
    // Use all scenrios
    options.scenarios = scenarios;
}

export function contacts() {
    http.get('https://test.k6.io/contacts.php');
    // ...
}

export function news() {
    http.get('https://test.k6.io/news.php');
    // ...
}

k6 run script.js will run the test will all of the scenarios enabled, while k6 run --env scenario=contacts script.js or k6 run --env scenario=news script.js will run it with just a single scenario.

4 Likes
3

Feature request:

4

Where i should put this ‘if’ block ?

ERRO[0001] ReferenceError: scenarios is not defined
        at file:///C:/Dev/k6-scenarios.js:73:38(159)  hint="script exception"
5

Ok. i put the ‘if’ block into ‘default function’,

but I am getting an error

let scenario = __ENV.SCENARIO; //this works
options.scenarios[scenario] = my_scenarios[scenario]; //this doesnt

INFO[0001] scenario: "scenario_one"                      source=console
INFO[0001] my_scenarios: {"executor":"per-vu-iterations","vus":1,"iterations":1,"exec":"scenario_one"}  source=console
INFO[0001] options.scenarios: {}                         source=console
ERRO[0001] TypeError: Cannot assign to property scenario_one of a host object