---
title: Testing a successful transaction
framework: storekit
role: article
role_heading: Article
path: storekit/testing-a-successful-transaction
---

# Testing a successful transaction

Confirm that your app can make a successful transaction in the sandbox environment by inspecting the transaction.

## Overview

Overview Set a breakpoint in your implementation of the transaction queue observer’s paymentQueue(_:updatedTransactions:) method. Then sign in to the App Store with a Sandbox Apple Account, and make a purchase in your app. Inspect the transaction to verify that its status is SKPaymentTransactionState.purchased. Set a breakpoint at the point in your code where your app stores the purchase, and confirm that your code saves the data in response to a successful purchase. Inspect the user default or iCloud key-value store, to verify that your code correctly records the information. For more information on saving data in response to a successful purchase, see Persisting a purchase.

## See Also

### Transaction observer

- [Testing transaction observer code](storekit/testing-transaction-observer-code.md)
- [Testing complete transactions](storekit/testing-complete-transactions.md)