openmct/e2e/tests/performance/memleak-imagery.perf.spec.js

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/*
This test suite is an initial example for memory leak testing using performance. This configuration and execution must
be kept separate from the traditional performance measurements to avoid any "observer" effects associated with tracing
or profiling playwright and/or the browser.

Based on a pattern identified in https://github.com/trentmwillis/devtools-protocol-demos/blob/master/testing-demos/memory-leak-by-heap.js
and https://github.com/paulirish/automated-chrome-profiling/issues/3

Best path forward: https://github.com/cowchimp/headless-devtools/blob/master/src/Memory/example.js

*/

const { test, expect } = require('@playwright/test');

const filePath = 'e2e/test-data/PerformanceDisplayLayout.json';

// eslint-disable-next-line playwright/no-skipped-test
test.describe.skip('Memory Performance tests', () => {
  test.beforeEach(async ({ page, browser }, testInfo) => {
    // Go to baseURL
    await page.goto('./', { waitUntil: 'networkidle' });

    // Click a:has-text("My Items")
    await page.locator('a:has-text("My Items")').click({
      button: 'right'
    });

    // Click text=Import from JSON
    await page.locator('text=Import from JSON').click();

    // Upload Performance Display Layout.json
    await page.setInputFiles('#fileElem', filePath);

    // Click text=OK
    await page.locator('text=OK').click();

    await expect(
      page.locator('a:has-text("Performance Display Layout Display Layout")')
    ).toBeVisible();
  });

  test('Embedded View Large for Imagery is performant in Fixed Time', async ({ page, browser }) => {
    await page.goto('./', { waitUntil: 'networkidle' });

    // To to Search Available after Launch
    await page.locator('[aria-label="OpenMCT Search"] input[type="search"]').click();
    // Fill Search input
    await page
      .locator('[aria-label="OpenMCT Search"] input[type="search"]')
      .fill('Performance Display Layout');
    //Search Result Appears and is clicked
    await Promise.all([
      page.waitForNavigation(),
      page.locator('a:has-text("Performance Display Layout")').first().click()
    ]);

    //Time to Example Imagery Frame loads within Display Layout
    await page.waitForSelector('.c-imagery__main-image__bg', { state: 'visible' });
    //Time to Example Imagery object loads
    await page.waitForSelector('.c-imagery__main-image__background-image', { state: 'visible' });

    const client = await page.context().newCDPSession(page);
    await client.send('HeapProfiler.enable');
    await client.send('HeapProfiler.startSampling');
    // await client.send('HeapProfiler.collectGarbage');
    await client.send('Performance.enable');

    let performanceMetricsBefore = await client.send('Performance.getMetrics');
    console.log(performanceMetricsBefore.metrics);

    //await client.send('Performance.disable');

    //Open Large view
    await page.locator('button:has-text("Large View")').click();
    await client.send('HeapProfiler.takeHeapSnapshot');

    //Time to Imagery Rendered in Large Frame
    await page.waitForSelector('.c-imagery__main-image__bg', { state: 'visible' });

    //Time to Example Imagery object loads
    await page.waitForSelector('.c-imagery__main-image__background-image', { state: 'visible' });

    // Click Close Icon
    await page.locator('.c-click-icon').click();

    //Time to Example Imagery Frame loads within Display Layout
    await page.waitForSelector('.c-imagery__main-image__bg', { state: 'visible' });
    //Time to Example Imagery object loads
    await page.waitForSelector('.c-imagery__main-image__background-image', { state: 'visible' });

    await client.send('HeapProfiler.collectGarbage');
    //await client.send('Performance.enable');

    let performanceMetricsAfter = await client.send('Performance.getMetrics');
    console.log(performanceMetricsAfter.metrics);

    //await client.send('Performance.disable');
  });
});