Refactor Dsn class

Author: Tigrov

tests/Support/TestTrait.php

@@ -36,15 +36,15 @@ protected function getConnection(bool $fixture = false): PdoConnectionInterface
 
     protected static function getDb(): PdoConnectionInterface
     {
-        $dsn = (new Dsn('pgsql', '127.0.0.1', 'yiitest', '5432'))->asString();
+        $dsn = (new Dsn(databaseName: 'yiitest'))->asString();
 
         return new Connection(new Driver($dsn, 'root', 'root'), DbHelper::getSchemaCache());
     }
 
     protected function getDsn(): string
     {
         if ($this->dsn === '') {
-            $this->dsn = (new Dsn('pgsql', '127.0.0.1', 'yiitest', '5432'))->asString();
+            $this->dsn = (new Dsn(databaseName: 'yiitest'))->asString();
         }
 
         return $this->dsn;