Merge remote-tracking branch 'nickvergessen/ticket/9066' into develop-olympus

* nickvergessen/ticket/9066:
  [ticket/9066] Move regex into get_preg_expression function and add tests
  [ticket/9066] Disallow some database prefix to prevent same errors and problems

tests/regex/table_prefix_test.php

@@ -0,0 +1,35 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2011 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
+
+class phpbb_regex_table_prefix_test extends phpbb_test_case
+{
+	public function table_prefix_test_data()
+	{
+		return array(
+			array('phpbb_', 1),
+			array('phpBB3', 1),
+			array('a', 1),
+
+			array('', 0),
+			array('_', 0),
+			array('a-', 0),
+			array("'", 0),
+		);
+	}
+
+	/**
+	* @dataProvider table_prefix_test_data
+	*/
+	public function test_table_prefix($prefix, $expected)
+	{
+		$this->assertEquals($expected, preg_match(get_preg_expression('table_prefix'), $prefix));
+	}
+}