Contrib.social

Add Drupal-Test-Traits header to test requests

Open on Drupal.org →
Created on 15 March 2025, 21 days ago

Problem/Motivation

In some cases it's useful to be able to detect whether the site is under test. For example when doing local development I sometimes have caches disabled in settings.php, but I'd like the DTT tests to run against the site with them enabled.

Steps to reproduce

Add this to your settings.php:

$settings['container_yamls'][] = DRUPAL_ROOT . '/sites/development.services.yml';
$settings['cache']['bins']['render'] = 'cache.backend.null';
$settings['cache']['bins']['page'] = 'cache.backend.null';
$settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null';

Then run any DTT tests.

Proposed resolution

Add a Drupal-Test-Traits header with a value of 1 to all requests made via a DTT base class.

Then in your settings.php you might do something like


$is_test = !empty($_SERVER['HTTP_DRUPAL_TEST_TRAITS']);
$settings['deployment_identifier'] = $is_test ? '0' : '1';
if (!$is_test) {
  $settings['container_yamls'][] = DRUPAL_ROOT . '/sites/development.services.yml';
  $settings['cache']['bins']['render'] = 'cache.backend.null';
  $settings['cache']['bins']['page'] = 'cache.backend.null';
  $settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null';
}

Remaining tasks

User interface changes

API changes

Data model changes

✨ Feature request
Status

Active

Component

Code

Created by

🇬🇧United Kingdom AndyF

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