AnnounceTestHttpClientMiddleware.php

<?php

namespace Drupal\announce_feed_test;

use Drupal\Core\Cache\Cache;
use Drupal\Core\Url;
use GuzzleHttp\Promise\PromiseInterface;
use GuzzleHttp\Psr7\Uri;
use Psr\Http\Message\RequestInterface;

/**
 * Overrides the requested endpoint when running tests.
 */
class AnnounceTestHttpClientMiddleware {
    
    /**
     * HTTP middleware that replaces request endpoint for a test one.
     */
    public function __invoke() : \Closure {
        return function ($handler) {
            return function (RequestInterface $request, array $options) use ($handler) : PromiseInterface {
                $test_end_point = \Drupal::state()->get('announce_test_endpoint');
                if ($test_end_point && str_contains($request->getUri(), '://www.drupal.org/announcements.json')) {
                    // Only override $uri if it matches the advisories JSON feed to avoid
                    // changing any other uses of the 'http_client' service during tests with
                    // this module installed.
                    $request = $request->withUri(new Uri($test_end_point));
                }
                return $handler($request, $options);
            };
        };
    }
    
    /**
     * Sets the test endpoint for the advisories JSON feed.
     *
     * @param string $test_endpoint
     *   The test endpoint.
     */
    public static function setAnnounceTestEndpoint(string $test_endpoint) : void {
        // Convert the endpoint to an absolute URL.
        $test_endpoint = Url::fromUri('base:/' . $test_endpoint)->setAbsolute()
            ->toString();
        \Drupal::state()->set('announce_test_endpoint', $test_endpoint);
        \Drupal::service('keyvalue.expirable')->get('announcements_feed')
            ->delete('announcements');
        Cache::invalidateTags([
            'announcements_feed:feed',
        ]);
    }

}