WARNING: engine playwright specified but module artillery-engine-playwright could not be loaded

[HenilMistry]

TypeError: Cannot add property $rewriteMetricName, object is not extensible

Couldn't find the solution for this error. Anyone can help here ?

[hassy]

Two separate issues here it seems. What version of Artillery are you running? And share some code that reproduces the other $rewriteMetricName error too please

[HenilMistry]

Answer to first question:

About the second one:

Below is my yamle file configuration named "common-config.yaml"

# First Section : Configuration Section For Your Test
config:
  target: <app-home-page-link>
  engines:
    playwright: {}
      # headless: false
  phases:
    - duration: 10
      arrivalRate: 1
      name: First Phase
  processor: "./tests/artillery/loginTest.js"
# Second Section : Scenarios Definition For Your Test
scenarios:
  - name: First Test
    engines: playwright
    flow:
      - testFunction: "loginScript"

Below is my processor file named "loginTest.js"

import { loginFunction } from '../commands/login.js'

async function loginScript(page) {
    await loginFunction(page);
}

export { loginScript };

The loginFunction contains the playwrite script that is used to perform login and assert some text after landing on home page.

[HenilMistry]

Oh! I realised it was my mistake, I changed the yaml file a little bit and the test file too.

New YAML File Configuration

# First Section : Configuration Section For Your Test
config:
  target: <app-home-page-link>
  engines:
    playwright: {}
      # headless: false
  # phases:
  #   - duration: 10
  #     arrivalRate: 1
  #     name: First Phase
  # processor: "./tests/artillery/loginTest.js"
# Second Section : Scenarios Definition For Your Test
scenarios:
  - name: First Test
    engine: playwright
    flowScript: "tests/artillery/loginTest.js"

New loginTest.js file

import { loginFunction } from '../commands/login.js'

export default async function (page) {
    await loginFunction(page);
}

It stopped throwing both of the above errors but now I have this error "Playwright test function not found: undefined" which is confusing because it should have the test function since it's default export from my loginTest.js script.

Isn't it ?

[HenilMistry]

This is preetyly annoying

I mean I have tried to modify my code like below example which is given on official website which uses typescript to define the test. Altough it was looking easy to go with, I am just keep jumping here and there solving same set of errors. Either it says module not found or it says "fn" is not defined.

Stuck while adpoting it since this week

I was looking for a good option to switch with my current JMeter + Selenium workflow. Was giving a try but now, I feel exhausted. Not droping here though. Please find my file below, let me know you find some help or flaw in my configuration.

some-test.ts file

import { Page, expect } from '@playwright/test';
 
export const config = {
  target: '<app-link>',
  engines: {
    playwright: {}
  }
};
 
export const scenarios = [{
  engine: 'playwright',
  testFunction: loginFunction
}];

async function loginFunction (page: Page) {
    // Navigate to the base URL (ensure the URL is defined in your Artillery config).
    await page.goto('<app-link>');

    // Locate and interact with the username field.
    await page.getByTestId('username').click();
    await page.getByTestId('username').fill(<username>);
    await page.getByRole('button', { name: 'Continue' }).click();

    // Locate and interact with the password field.
    await page.getByTestId('password').click();
    await page.getByTestId('password').fill(<password>);
    await page.getByRole('button', { name: 'Continue' }).click();

    // Click the "Accept" button.
    await page.getByTestId('accept-button').click();

    // Add Playwright assertions to validate the result.
    await expect(page.getByRole('heading', { name: '<title>' })).toBeVisible();
    await expect(page.getByRole('heading')).toContainText('<title>');
}

[hassy]

What's the problem you're running into exactly?