Add unit test

Author: timfish

packages/core/test/lib/transports/offline.test.ts

@@ -7,12 +7,14 @@ import type {
   ReplayEvent,
   Transport,
   TransportMakeRequestResponse,
+  ClientReport,
 } from '@sentry/types';
 import {
   createEnvelope,
   createEventEnvelopeHeaders,
   dsnFromString,
   getSdkMetadataForEnvelopeHeader,
+  createClientReportEnvelope,
 } from '@sentry/utils';
 import { TextEncoder } from 'util';
 
@@ -54,6 +56,25 @@ const RELAY_ENVELOPE = createEnvelope<ReplayEnvelope>(
   ],
 );
 
+const DEFAULT_DISCARDED_EVENTS: ClientReport['discarded_events'] = [
+  {
+    reason: 'before_send',
+    category: 'error',
+    quantity: 30,
+  },
+  {
+    reason: 'network_error',
+    category: 'transaction',
+    quantity: 23,
+  },
+];
+
+const CLIENT_REPORT_ENVELOPE = createClientReportEnvelope(
+  DEFAULT_DISCARDED_EVENTS,
+  'https://[email protected]/1337',
+  123456,
+);
+
 const transportOptions = {
   recordDroppedEvent: () => undefined, // noop
   textEncoder: new TextEncoder(),
@@ -288,6 +309,23 @@ describe('makeOfflineTransport', () => {
     expect(getCalls()).toEqual([]);
   });
 
+  it('should not store client report envelopes on send failure', async () => {
+    const { getCalls, store } = createTestStore();
+    const { getSendCount, baseTransport } = createTestTransport(new Error());
+    const queuedCount = 0;
+    const transport = makeOfflineTransport(baseTransport)({
+      ...transportOptions,
+      createStore: store,
+      shouldStore: () => true,
+    });
+    const result = transport.send(CLIENT_REPORT_ENVELOPE);
+
+    await expect(result).rejects.toBeInstanceOf(Error);
+    expect(queuedCount).toEqual(0);
+    expect(getSendCount()).toEqual(0);
+    expect(getCalls()).toEqual([]);
+  });
+
   it(
     'Follows the Retry-After header',
     async () => {