HTTP Streaming Load Tests

[michaelbarnes]

Hey, I have a use case to run load tests using HTTP streams. I'm not seeing specific docs on this. Are there any guides on how to achieve this?

Separate question, but related. I'd like to write the tests in TypeScript, which I see is possible, however I want the scenario to call my custom function which firstly, does an API call and then secondly, process the chunks and report the time it took for the download to complete and return that to artillery so that I can report the results. Is there any example code for this?

[michaelbarnes]

For those interested, this is possible and here is some sample code.

test.yml

config:
  target: https://example.com
  processor: "./processor.ts"
scenarios:
  - flow:
      - function: "stream"

processor.ts

export async function stream(context, ee) {
    const startTime = Date.now();
    
    const response = await fetch(context.vars.target + '/sync/stream', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify(request),

    });
    
    const endTime = Date.now();
    const duration = endTime - startTime;
    ee.emit('histogram', 'http.response_time', duration);
};