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htmlpurifier/tests/FSTools/FileSystemHarness.php

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<?php
/**
* Test harness that sets up a filesystem sandbox for file-emulation
* functions to safely unit test in.
*
* @todo Make an automatic FSTools mock or something
*/
class FSTools_FileSystemHarness extends UnitTestCase
{
protected $dir, $oldDir;
function __construct() {
parent::UnitTestCase();
$this->dir = 'tmp/' . md5(uniqid(rand(), true)) . '/';
mkdir($this->dir);
$this->oldDir = getcwd();
}
function __destruct() {
FSTools::singleton()->rmdirr($this->dir);
}
function setup() {
chdir($this->dir);
}
function tearDown() {
chdir($this->oldDir);
}
}