Merge \"docs: Noted that orderId is blank for all test purchases.\" into mnc-io-docs

<code>orderId</code> field of the <code>PURCHASE_STATE_CHANGED</code>

intent.</p>

<p class="note">

  <strong>Note:</strong> When a user completes a test purchase, the

  <code>orderId</code> field remains blank. To track test transactions, use

  the <code>purchaseToken</code> field instead. For more information about

  working with test purchases, see <a

  href="{@docRoot}google/play/billing/billing_testing.html">Testing In-app

  Billing</a>.

</p>

<p>In your app, you can use the order number as a general-purpose identifier for

the in-app purchase transaction. After the purchase, you can use the order

number as a means of tracking the transaction in reconciliation reports and for

through Google Play without incurring any actual charges to the user

accounts.</p>

<p>Once authorized for testing access, those users can make purchases without

being charged.

Test purchases are real orders and Google Play processes them in the same way as

other orders. However, the <code>orderId</code> field for test purchases is

blank.

When purchases are complete, Google Play prevents the orders from

going to financial processing, ensuring that there are no actual charges to user

accounts, and automatically canceling the completed orders after 14 days.</p>

<p>

  Once authorized for testing access, those users can make purchases without

  being charged. The <code>orderId</code> field for test purchases remains

  blank, ensuring that there are no actual charges to user accounts.

</p>

<p class="note">

  <strong>Note:</strong> Test subscription purchases recur daily, regardless of

purchase dialog.</p>

<p class="note">

  <strong>Note:</strong> For test subscription purchases, leave the {@code orderId}

  field blank. You can use the {@code purchaseToken} field to identify test purchases.

  <strong>Note:</strong> For test purchases, leave the {@code orderId} field

  blank. You can use the {@code purchaseToken} field to identify test purchases.

</p>

<h4 id="cancelling">Canceling completed test purchases</h4>

<p>Google Play accumulates completed test purchases for each user but does not

pass them on  to financial processing. Over time, it automatically clears out

the purchases by canceling them. </p>

pass them on to financial processing.</p>

<p>In some cases, you might want to manually cancel a test purchase to continue

testing. For canceling purchases, you have these options:</p>

<ul>

<li>Wait for the transactions to expire&mdash;Google Play clears completed test

purchases 14 days after their purchase date. </li>

<li>Cancel purchases manually&mdash;you can go to the Google payments merchant

center, look up the transaction, and then cancel it. You can find transactions

by looking up their order numbers.</li>

</ul>

<p>

  You can cancel test subscriptions purchases from the app page in the Play Store,

  or use the 

testing. To do so, open the app page in the Play Store. If the test purchase

that you want to cancel is a subscription, you can also use the

<a href="https://developers.google.com/android-publisher/api-ref/purchases/subscriptions/cancel">

  {@code cancel}</a> method.

</p>

{@code cancel()}</a> method of the Purchases.subscriptions API.

</ul>

<p class="caution">

  <strong>Important:</strong> The

  <a href="https://developers.google.com/android-publisher/api-ref/purchases/subscriptions/refund">

  {@code refund}</a> and

  {@code refund()}</a> and

  <a href="https://developers.google.com/android-publisher/api-ref/purchases/subscriptions/revoke">

  {@code revoke}</a> methods do not support test purchases.

  {@code revoke()}</a> methods of the Purchases.subscriptions API don't support

  test purchases.

</p>