Wordpress/tests/phpunit/wp-mail-real-test.php

<?php
/**
 * wp-mail-real-test.php
 *
 * Test script for wp_mail with real addresses.
 */

// parse options
$options = 'v:r:d';
if ( is_callable( 'getopt' ) ) {
	$opts = getopt( $options );
} else {
	include( dirname( __FILE__ ) . '/wp-testlib/getopt.php' );
	$opts = getoptParser::getopt( $options );
}

define( 'DIR_TESTROOT', realpath( dirname( __FILE__ ) ) );

define( 'TEST_WP', true );
define( 'WP_DEBUG', array_key_exists( 'd', $opts ) );

if ( ! empty( $opts['r'] ) ) {
	define( 'DIR_WP', realpath( $opts['r'] ) );
} elseif ( ! empty( $opts['v'] ) ) {
		define( 'DIR_WP', DIR_TESTROOT . '/wordpress-' . $opts['v'] );
} else {
	define( 'DIR_WP', DIR_TESTROOT . '/wordpress' );
}

// make sure all useful errors are displayed during setup
error_reporting( E_ALL & ~E_DEPRECATED );
ini_set( 'display_errors', true );

require_once( DIR_TESTROOT . '/wp-testlib/utils.php' );

// configure wp
require_once( DIR_TESTROOT . '/wp-config.php' );
define( 'ABSPATH', realpath( DIR_WP ) . '/' );

// install wp
define( 'WP_BLOG_TITLE', rand_str() );
define( 'WP_USER_NAME', rand_str() );
define( 'WP_USER_EMAIL', rand_str() . '@example.com' );

// initialize wp
define( 'WP_INSTALLING', 1 );
$_SERVER['PATH_INFO'] = $_SERVER['SCRIPT_NAME']; // prevent a warning from some sloppy code in wp-settings.php
require_once( ABSPATH . 'wp-settings.php' );

drop_tables();

require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
wp_install( WP_BLOG_TITLE, WP_USER_NAME, WP_USER_EMAIL, true );

// make sure we're installed
assert( true == is_blog_installed() );

// phpcs:ignore Generic.NamingConventions.UpperCaseConstantName.ConstantNotUpperCase
define( 'PHPUnit_MAIN_METHOD', false );
$original_wpdb = $GLOBALS['wpdb'];

// hide warnings during testing, since that's the normal WP behaviour
if ( ! WP_DEBUG ) {
	error_reporting( E_ALL ^ E_NOTICE );
}

$to        = 'To <wp.mail.testing@gmail.com>';
$from      = 'From <wp.mail.testing+from@gmail.com>';
$cc        = 'CC <wp.mail.testing+cc@gmail.com>';
$bcc       = 'BCC <wp.mail.testing+bcc@gmail.com>';
$subject   = 'RFC2822 Testing';
$message   = 'My RFC822 Test Message';
$headers[] = "From: {$from}";
$headers[] = "CC: {$cc}";

wp_mail( $to, $subject, $message, $headers );

$headers   = array();
$subject   = 'RFC2822 Testing 2';
$message   = 'My RFC822 Test Message 2';
$to        = 'To <wp.mail.testing+to@gmail.com>';
$headers[] = "BCC: {$bcc}";
wp_mail( '', $subject, $message, $headers );
echo "Test emails sent!\n";