improved unit test SKIP detection

tests/unit/extensions/sphinx/SphinxTestCase.php

@@ -48,6 +48,12 @@ class SphinxTestCase extends TestCase
         if (!extension_loaded('pdo') || !extension_loaded('pdo_mysql')) {
             $this->markTestSkipped('pdo and pdo_mysql extension are required.');
         }
+        // check whether sphinx is running and skip tests if not.
+        if (preg_match('/host=([\w\d.]+)/i', $this->sphinxConfig['dsn'], $hm) && preg_match('/port=(\d+)/i', $this->sphinxConfig['dsn'], $pm)) {
+            if (!@stream_socket_client($hm[1] . ':' . $pm[1], $errorNumber, $errorDescription, 0.5)) {
+                $this->markTestSkipped('No redis server running at ' . $hm[1] . ':' . $pm[1] . ' : ' . $errorNumber . ' - ' . $errorDescription);
+            }
+        }
         $config = self::getParam('sphinx');
         if (!empty($config)) {
             $this->sphinxConfig = $config['sphinx'];

tests/unit/framework/caching/MemCacheTest.php

@@ -21,6 +21,11 @@ class MemCacheTest extends CacheTestCase
             $this->markTestSkipped("memcache not installed. Skipping.");
         }
 
+        // check whether memcached is running and skip tests if not.
+        if (!@stream_socket_client('127.0.0.1:11211', $errorNumber, $errorDescription, 0.5)) {
+            $this->markTestSkipped('No redis server running at ' . '127.0.0.1:11211' . ' : ' . $errorNumber . ' - ' . $errorDescription);
+        }
+
         if ($this->_cacheInstance === null) {
             $this->_cacheInstance = new MemCache();
         }

tests/unit/framework/caching/MemCachedTest.php

@@ -21,6 +21,11 @@ class MemCachedTest extends CacheTestCase
             $this->markTestSkipped("memcached not installed. Skipping.");
         }
 
+        // check whether memcached is running and skip tests if not.
+        if (!@stream_socket_client('127.0.0.1:11211', $errorNumber, $errorDescription, 0.5)) {
+            $this->markTestSkipped('No redis server running at ' . '127.0.0.1:11211' . ' : ' . $errorNumber . ' - ' . $errorDescription);
+        }
+
         if ($this->_cacheInstance === null) {
             $this->_cacheInstance = new MemCache(['useMemcached' => true]);
         }

tests/unit/framework/db/sqlite/SqliteConnectionTest.php

@@ -122,7 +122,7 @@ class SqliteConnectionTest extends ConnectionTest
 
         $config = [
             'class' => 'yii\db\Connection',
-            'dsn' => 'sqlite:memory:',
+            'dsn' => 'sqlite::memory:',
         ];
         $this->prepareDatabase($config, $fixture)->close();