test: fix redis not being used properly in imapClientFactoryTest

tests/Integration/Framework/Caching.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCA\Mail\Tests\Integration\Framework;
+
+use OC\Memcache\Factory;
+use OCA\Mail\Cache\HordeCacheFactory;
+use OCA\Mail\IMAP\IMAPClientFactory;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\IConfig;
+use OCP\Profiler\IProfiler;
+use OCP\Security\ICrypto;
+use OCP\Server;
+use Psr\Log\LoggerInterface;
+
+class Caching {
+	/**
+	 * Force usage of a real cache as configured in system config. The original ICacheFactory
+	 * service closure is hard-coded to always return an instance of ArrayCache when the global
+	 * PHPUNIT_RUN is defined.
+	 */
+	public static function getImapClientFactoryAndConfiguredCacheFactory(?ICrypto $crypto = null): array {
+		$config = Server::get(IConfig::class);
+		$cacheFactory = new Factory(
+			static fn () => 'mail-integration-tests',
+			Server::get(LoggerInterface::class),
+			Server::get(IProfiler::class),
+			$config->getSystemValue('memcache.local', null),
+			$config->getSystemValue('memcache.distributed', null),
+			$config->getSystemValue('memcache.locking', null),
+			$config->getSystemValueString('redis_log_file')
+		);
+		$imapClient = new IMAPClientFactory(
+			$crypto ?? Server::get(ICrypto::class),
+			$config,
+			$cacheFactory,
+			Server::get(IEventDispatcher::class),
+			Server::get(ITimeFactory::class),
+			Server::get(HordeCacheFactory::class),
+		);
+		return [$imapClient, $cacheFactory];
+	}
+}

tests/Integration/IMAP/IMAPClientFactoryTest.php

@@ -18,6 +18,7 @@
 use OCA\Mail\Db\MailAccount;
 use OCA\Mail\IMAP\HordeImapClient;
 use OCA\Mail\IMAP\IMAPClientFactory;
+use OCA\Mail\Tests\Integration\Framework\Caching;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\ICacheFactory;
@@ -110,13 +111,21 @@ public function testRateLimiting(): void {
 		if (ltrim($cacheClass, '\\') !== Redis::class) {
 			$this->markTestSkipped('Redis not available. Found ' . $cacheClass);
 		}
+
+		[$imapClientFactory, $cacheFactory] = Caching::getImapClientFactoryAndConfiguredCacheFactory($this->crypto);
+		$this->assertInstanceOf(
+			Redis::class,
+			$cacheFactory->createDistributed(),
+			'Distributed cache is not Redis',
+		);
+
 		$account = $this->getTestAccount();
 		$this->crypto->expects($this->once())
 			->method('decrypt')
 			->with('encrypted')
 			->willReturn('notmypassword');
 
-		$client = $this->factory->getClient($account);
+		$client = $imapClientFactory->getClient($account);
 		self::assertInstanceOf(HordeImapClient::class, $client);
 		foreach ([1, 2, 3] as $attempts) {
 			try {