test(nestjs): Fix flaky schedule instrumentation error tests (#25447)

The `@Interval` (and `@Cron`) handlers in `nestjs-basic` threw an
identical error on every tick, and the `Dedupe` integration drops
consecutive identical errors. Once earlier tests have killed the other
erroring cron jobs, nothing interleaves, so only the first interval
error is ever sent — often before the test starts listening — and
`waitForError` times out.

The handlers now include `Date.now()` in the error message so every tick
produces a distinct error, and the tests only accept an error thrown
after the test started.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: mydea

dev-packages/e2e-tests/test-applications/nestjs-basic/src/schedule.service.ts

@@ -7,15 +7,16 @@ export class ScheduleService {
   constructor(private schedulerRegistry: SchedulerRegistry) {}
 
   // @Cron error test (auto-instrumentation, no @SentryCron)
+  // The timestamp keeps the Dedupe integration from dropping the error on repeated ticks.
   @Cron('*/5 * * * * *', { name: 'test-schedule-cron-error' })
   handleCronError() {
-    throw new Error('Test error from schedule cron');
+    throw new Error(`Test error from schedule cron ${Date.now()}`);
   }
 
   // @Interval error test
   @Interval('test-schedule-interval-error', 2000)
   async handleIntervalError() {
-    throw new Error('Test error from schedule interval');
+    throw new Error(`Test error from schedule interval ${Date.now()}`);
   }
 
   // @Timeout error test

dev-packages/e2e-tests/test-applications/nestjs-basic/tests/schedule-instrumentation.test.ts

@@ -2,10 +2,12 @@ import { expect, test } from '@playwright/test';
 import { waitForError, waitForStreamedSpan } from '@sentry-internal/test-utils';
 
 test('Sends exceptions to Sentry on error in @Cron decorated method', async ({ baseURL }) => {
+  const testStart = Date.now();
   const errorEventPromise = waitForError('nestjs-basic', event => {
+    const thrownAt = event.exception?.values?.[0]?.value?.match(/^Test error from schedule cron (\d+)$/)?.[1];
     return (
       !event.type &&
-      event.exception?.values?.[0]?.value === 'Test error from schedule cron' &&
+      Number(thrownAt) >= testStart &&
       event.exception?.values?.[0]?.mechanism?.type === 'auto.function.nestjs.cron'
     );
   });
@@ -23,10 +25,12 @@ test('Sends exceptions to Sentry on error in @Cron decorated method', async ({ b
 });
 
 test('Sends exceptions to Sentry on error in @Interval decorated method', async ({ baseURL }) => {
+  const testStart = Date.now();
   const errorEventPromise = waitForError('nestjs-basic', event => {
+    const thrownAt = event.exception?.values?.[0]?.value?.match(/^Test error from schedule interval (\d+)$/)?.[1];
     return (
       !event.type &&
-      event.exception?.values?.[0]?.value === 'Test error from schedule interval' &&
+      Number(thrownAt) >= testStart &&
       event.exception?.values?.[0]?.mechanism?.type === 'auto.function.nestjs.interval'
     );
   });