test(cloudflare): Unflake integration test

Author: JPeer264

dev-packages/cloudflare-integration-tests/runner.ts

@@ -242,6 +242,10 @@ export function createRunner(...paths: string[]) {
               `SENTRY_DSN:http://public@localhost:${mockServerPort}/1337`,
               '--var',
               `SERVER_URL:${serverUrl}`,
+              '--port',
+              '0',
+              '--inspector-port',
+              '0',
               ...extraWranglerArgs,
             ],
             { stdio, signal },

dev-packages/cloudflare-integration-tests/suites/tracing/durableobject-spans/test.ts

@@ -45,10 +45,20 @@ it('sends child spans on repeated Durable Object calls', async ({ signal }) => {
   // Expect 5 transaction envelopes — one per call.
   const runner = createRunner(__dirname).expectN(5, assertDoWorkEnvelope).start(signal);
 
+  // Small delay between requests to allow waitUntil to process in wrangler dev.
+  // This is needed because wrangler dev may not guarantee waitUntil completion
+  // the same way production Cloudflare does. Without this delay, the last
+  // envelope's HTTP request may not complete before the test moves on.
+  const delay = () => new Promise(resolve => setTimeout(resolve, 50));
+
   await runner.makeRequest('get', '/');
+  await delay();
   await runner.makeRequest('get', '/');
+  await delay();
   await runner.makeRequest('get', '/');
+  await delay();
   await runner.makeRequest('get', '/');
+  await delay();
   await runner.makeRequest('get', '/');
   await runner.completed();
 });

dev-packages/cloudflare-integration-tests/vite.config.mts

@@ -28,6 +28,9 @@ export default defineConfig({
         singleThread: true,
       },
     },
+    sequence: {
+      shuffle: true,
+    },
     reporters: process.env.DEBUG
       ? ['default', { summary: false }]
       : process.env.GITHUB_ACTIONS