fix kafka message persistence completion

server/im_http_test.go

@@ -41,7 +41,8 @@ type testVerificationStore struct {
 }
 
 type testHTTPInfrastructureStore struct {
-	deadLetters []types.KafkaDeadLetter
+	deadLetters      []types.KafkaDeadLetter
+	markSucceededErr error
 }
 
 type testTenantEntryStore struct {
@@ -110,6 +111,9 @@ func (s *testHTTPInfrastructureStore) BeginKafkaConsume(_ types.TenantID, record
 }
 
 func (s *testHTTPInfrastructureStore) MarkKafkaConsumeSucceeded(_ types.TenantID, _, _ string, _ time.Time) error {
+	if s.markSucceededErr != nil {
+		return s.markSucceededErr
+	}
 	return nil
 }