[task/session-tests] Added tests for the session class.

Two first simple tests to check functionality of session_begin and
session_create.

Added a mock class for the cache as well as a subclass of session
which has its cookie handling function mocked out to avoid header
sending problems.

PHPBB3-9732

tests/mock/cache.php

@@ -0,0 +1,61 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2008 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+class phpbb_mock_cache
+{
+	public function __construct($data = array())
+	{
+		$this->data = $data;
+
+		if (!isset($this->data['_bots']))
+		{
+			$this->data['_bots'] = array();
+		}
+	}
+
+	public function get($var_name)
+	{
+		if (isset($this->data[$var_name]))
+		{
+			return $this->data[$var_name];
+		}
+
+		return false;
+	}
+
+	public function put($var_name, $var, $ttl = 0)
+	{
+		$this->data[$var_name] = $var;
+	}
+
+	/**
+	* Obtain active bots
+	*/
+	public function obtain_bots()
+	{
+		return $this->data['_bots'];
+	}
+
+	public function set_bots($bots)
+	{
+		$this->data['_bots'] = $bots;
+	}
+
+	public function checkVar(PHPUnit_Framework_Assert $test, $var_name, $data)
+	{
+		$test->assertTrue(isset($this->data[$var_name]));
+		$test->assertEquals($data, $this->data[$var_name]);
+	}
+
+	public function check(PHPUnit_Framework_Assert $test, $data)
+	{
+		$test->assertEquals($data, $this->data);
+	}
+}
+