Added pdo_mysql basic connection test

Author: SakiTakamachi

ext/pdo_mysql/tests/pdo_mysql_basic_connect.phpt

@@ -0,0 +1,27 @@
+--TEST--
+PDO_MYSQL: basic connection test
+--EXTENSIONS--
+pdo_mysql
+--SKIPIF--
+<?php
+require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'config.inc');
+$host = PDO_MYSQL_TEST_HOST;
+$port = PDO_MYSQL_TEST_PORT ?? 3306;
+$connection = @fsockopen($host, $port);
+if (!is_resource($connection)) {
+    die('skip: mysql server is not responding');
+}
+?>
+--FILE--
+<?php
+require_once(__DIR__ . DIRECTORY_SEPARATOR . 'mysql_pdo_test.inc');
+
+try {
+    $db = MySQLPDOTest::factory();
+    echo "Connected.\n";
+} catch (PDOException $e) {
+    echo $e->getMessage();
+}
+?>
+--EXPECT--
+Connected.