test(v8/browser): Unflake browser request test (#15055)

Backport of #15050

Co-authored-by: Francesco Gringl-Novy <francesco.novy@sentry.io>

Author: Lms24

dev-packages/browser-integration-tests/suites/tracing/request/fetch/test.ts

@@ -1,8 +1,10 @@
 import { expect } from '@playwright/test';
-import type { Event } from '@sentry/core';
-
 import { sentryTest } from '../../../../utils/fixtures';
-import { getMultipleSentryEnvelopeRequests, shouldSkipTracingTest } from '../../../../utils/helpers';
+import {
+  envelopeRequestParser,
+  shouldSkipTracingTest,
+  waitForTransactionRequestOnUrl,
+} from '../../../../utils/helpers';
 
 sentryTest('should create spans for fetch requests', async ({ getLocalTestUrl, page }) => {
   if (shouldSkipTracingTest()) {
@@ -11,14 +13,8 @@ sentryTest('should create spans for fetch requests', async ({ getLocalTestUrl, p
 
   const url = await getLocalTestUrl({ testDir: __dirname });
 
-  // Because we fetch from http://example.com, fetch will throw a CORS error in firefox and webkit.
-  // Chromium does not throw for cors errors.
-  // This means that we will intercept a dynamic amount of envelopes here.
-
-  // We will wait 500ms for all envelopes to be sent. Generally, in all browsers, the last sent
-  // envelope contains tracing data.
-  const envelopes = await getMultipleSentryEnvelopeRequests<Event>(page, 4, { url, timeout: 10000 });
-  const tracingEvent = envelopes.find(event => event.type === 'transaction')!; // last envelope contains tracing data on all browsers
+  const req = await waitForTransactionRequestOnUrl(page, url);
+  const tracingEvent = envelopeRequestParser(req);
 
   const requestSpans = tracingEvent.spans?.filter(({ op }) => op === 'http.client');
 

dev-packages/browser-integration-tests/suites/tracing/request/init.js

@@ -7,4 +7,5 @@ Sentry.init({
   integrations: [Sentry.browserTracingIntegration()],
   tracePropagationTargets: ['http://example.com'],
   tracesSampleRate: 1,
+  autoSessionTracking: false,
 });