Release testing instructions for WC Payments 7.2.0

Fix losing cart contents during the login at checkout - PR 8084

Prep:

Add the following snippet to the bottom of woocommerce-payments.php. Or you can use https://wordpress.org/plugins/code-snippets/ and add this snippet. This simulates another plugin making a request, with the session cookies, during login.

function do_api_call_w_cookies_on_wp_login() {
	$url = rest_url();
	
	$args = array(
		'cookies'   => $_COOKIE,
		'blocking'  => false,
		'timeout'   => 0.01,
		'sslverify' => apply_filters( 'https_local_ssl_verify', false ),
	);

	$result = wp_remote_get( $url, $args );
}

add_action( 'wp_login',  'do_api_call_w_cookies_on_wp_login' );

Test 1:

1. Ensure "Allow customers to log into an existing account during checkout" is enabled at WooCommerce > Settings > Accounts & Privacy
2. Ensure you're not logged into the store (or use a private browser session)
3. Add an item to your cart and go to the checkout page
4. Use the Returning customer? Click here to login option and login
5. Expectation: the cart is NOT empty.
6. Expectation: if this user has already had other active products in the cart before log-in, the final cart after log-in should merge these products and the product you've added in.

Test 2:

1. Enable account creation during checkout in the WooCommerce settings
2. Without logging in, add a product to cart and go to the checkout page
3. Fill out the checkout form and use a test card that requires authentication (such as 4000002500003155 or 4000 0027 6000 3184), don't forget to check the account creation checkbox
4. Submit the order and authorize it
5. Expectation: The order should be paid successfully.

Check translations are loading properly - PR 8050

Repeat the testing steps below for two different languages.

Testing steps

1. Go to WP admin dashboard > Settings > General, and change language to one of the languages supported by WooPayments: https://woo.com/document/woopayments/customization-and-translation/translations/

2. Go to WP updates page: /wp-admin/update-core.php, at the bottom of the page a button to update translations should appear (the text of the button can be in selected language if language pack for WordPress is already installed), click it to load new language pack.

Example for German language (Deutsch)

3. Check the output of the language pack installation. WooPayments should be listed (see screenshot below).

4. Check that translations for WooPayments appeared in UI. E.g. go to Payments > Overview page (first menu item).