test(browser-integration): Finalize LCP with a trusted click

web-vitals finalizes LCP on the first trusted input or visibility change and checks
`isTrusted`, so the synthetic `visibilitychange` this test dispatched never finalized it. It
passed anyway while `reportAllChanges` was on, since every LCP entry was reported as it
arrived. Soft navigation reporting turns that off, so on a browser that supports the Soft
Navigations API no LCP span was emitted at all. Clicking finalizes it the way a real user does.

Author: logaretm

dev-packages/browser-integration-tests/suites/tracing/metrics/web-vitals-lcp-streamed-spans/test.ts

@@ -1,7 +1,7 @@
 import type { Route } from '@playwright/test';
 import { expect } from '@playwright/test';
 import { sentryTest } from '../../../../utils/fixtures';
-import { hidePage, shouldSkipTracingTest } from '../../../../utils/helpers';
+import { shouldSkipTracingTest } from '../../../../utils/helpers';
 import { getSpanOp, waitForStreamedSpan } from '../../../../utils/spanUtils';
 
 sentryTest.beforeEach(async ({ browserName, page }) => {
@@ -30,7 +30,10 @@ sentryTest('captures LCP as a streamed span with element attributes', async ({ g
   // Wait for LCP to be captured
   await page.waitForTimeout(1000);
 
-  await hidePage(page);
+  // LCP finalizes on the first trusted input or visibility change, and web-vitals checks
+  // `isTrusted`, so a synthetically dispatched `visibilitychange` does not finalize it. Click to
+  // finalize the way a real user would.
+  await page.click('body');
 
   const lcpSpan = await lcpSpanPromise;
   const pageloadSpan = await pageloadSpanPromise;