Added the ability to extend StaticDriver for greater flexibility.

src/DAMA/DoctrineTestBundle/Doctrine/DBAL/StaticDriver.php

@@ -28,15 +28,15 @@ public function connect(array $params): Connection
             return parent::connect($params);
         }
 
-        $key = sha1(json_encode($params));
+        $key = $this->getConnectionHash($params);
 
-        if (!isset(self::$connections[$key])) {
-            self::$connections[$key] = parent::connect($params);
-            self::$connections[$key]->beginTransaction();
+        $connection = $this->getConnection($key);
+        if (null === $connection) {
+            $connection = parent::connect($params);
+            $this->addConnection($key, $connection);
+            $connection->beginTransaction();
         }
 
-        $connection = self::$connections[$key];
-
         $platform = $this->getPlatform($connection, $params);
 
         if (!$platform->supportsSavepoints()) {
@@ -77,6 +77,21 @@ public static function commit(): void
         }
     }
 
+    protected function getConnectionHash(array $params): string
+    {
+        return sha1(json_encode($params));
+    }
+
+    protected function getConnection(string $key): ?Connection
+    {
+        return self::$connections[$key] ?? null;
+    }
+
+    protected function addConnection(string $key, Connection $connection): void
+    {
+        self::$connections[$key] = $connection;
+    }
+
     private function getPlatform(Connection $connection, array $params): AbstractPlatform
     {
         if (isset($params['platform'])) {