[feature/request-class] Extracted type casting helpers from the request class.

These methods should be available without having to instantiate a request class
object, better separation of concerns. A set_var wrapper around this class no
longer requires a request object at all.

PHPBB3-9716

tests/request/type_cast_helper.php

@@ -0,0 +1,33 @@
+<?php
+/**
+*
+* @package testing
+* @version $Id$
+* @copyright (c) 2009 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+require_once 'test_framework/framework.php';
+require_once '../phpBB/includes/request/type_cast_helper_interface.php';
+require_once '../phpBB/includes/request/type_cast_helper.php';
+
+class phpbb_type_cast_helper_test extends phpbb_test_case
+{
+	private $type_cast_helper;
+
+	protected function setUp()
+	{
+		$this->type_cast_helper = new phpbb_type_cast_helper();
+	}
+
+	public function test_addslashes_recursively()
+	{
+		$data = array('some"string' => array('that"' => 'really"', 'needs"' => '"escaping'));
+		$expected = array('some\\"string' => array('that\\"' => 'really\\"', 'needs\\"' => '\\"escaping'));
+
+		$this->type_cast_helper->addslashes_recursively($data);
+
+		$this->assertEquals($expected, $data);
+	}
+}