recurly-8.x-1.x-dev/tests/modules/recurly_test_client/recurly_test_client.module

<?php

/**
 * @file
 * This is necessary to suppress the output of E_DEPRECATED warnings from the.
 */

// Recurly PHP library. Which isn't yet updated for PHP8+, and throws some
// deprecations. But still works.
//
// The problem is, these notices get output as X-Drupal-Assertion- HTTP headers
// the \Drupal\Core\Test\HttpClientMiddleware\TestHttpClientMiddleware sees them
// and since they're E_DEPRECATED and not E_USER_DEPRECATED turns around and
// raises an Exception for them and causes some of the tests to fail.
//
// In production you don't see this because:
// 1. You configure Drupal to not display errors, and
// 2. In _drupal_log_error() the function to convert errors to HTTP headers is
//    only called if the site is under test.
//
// But if suppress them, it works.
// @todo Remove this when the Recurly client is updated.
if (defined('DRUPAL_TEST_IN_CHILD_SITE') && DRUPAL_TEST_IN_CHILD_SITE === TRUE) {
  error_reporting(E_ALL ^ E_DEPRECATED);
}