Rename *CacheDriver to *Cache because they don't act as driver anymore

tests/src/Core/Cache/MemcachedCacheTest.php

@@ -0,0 +1,35 @@
+<?php
+
+
+namespace Friendica\Test\src\Core\Cache;
+
+use Friendica\Core\Cache\MemcachedCache;
+use Friendica\Core\Config\Configuration;
+use Psr\Log\NullLogger;
+
+/**
+ * @requires extension memcached
+ */
+class MemcachedCacheTest extends MemoryCacheTest
+{
+	protected function getInstance()
+	{
+		$configMock = \Mockery::mock(Configuration::class);
+
+		$configMock
+			->shouldReceive('get')
+			->with('system', 'memcached_hosts')
+			->andReturn([0 => 'localhost, 11211']);
+
+		$logger = new NullLogger();
+
+		$this->cache = new MemcachedCache('localhost', $configMock, $logger);
+		return $this->cache;
+	}
+
+	public function tearDown()
+	{
+		$this->cache->clear(false);
+		parent::tearDown();
+	}
+}