// @ts-check
// Lightweight constrained-device regression: the browser's 4 GB profile must
// reduce shared batch concurrency before multiple audio/image operations run.
const { test, expect } = require('@playwright/test');

test('4 GB browser profile caps shared batch concurrency at two', async ({ page }) => {
  await page.goto('/', { waitUntil: 'domcontentloaded' });
  await page.waitForFunction(() => typeof window.runPool === 'function', null, { timeout: 15_000 });
  const maxActive = await page.evaluate(async () => {
    Object.defineProperty(navigator, 'deviceMemory', { configurable: true, value: 4 });
    let active = 0;
    let max = 0;
    await window.runPool(Array.from({ length: 8 }, (_, i) => i), async () => {
      active += 1;
      max = Math.max(max, active);
      await new Promise(resolve => setTimeout(resolve, 15));
      active -= 1;
    }, 4);
    return max;
  });
  expect(maxActive).toBeLessThanOrEqual(2);
});