--- /dev/null
+<?php
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Filesystem helpers.
+ *
+ * @since Class available since Release 3.0.0
+ */
+class PHPUnit_Util_Filesystem
+{
+ /**
+ * @var array
+ */
+ protected static $buffer = array();
+
+ /**
+ * Maps class names to source file names:
+ * - PEAR CS: Foo_Bar_Baz -> Foo/Bar/Baz.php
+ * - Namespace: Foo\Bar\Baz -> Foo/Bar/Baz.php
+ *
+ * @param string $className
+ *
+ * @return string
+ *
+ * @since Method available since Release 3.4.0
+ */
+ public static function classNameToFilename($className)
+ {
+ return str_replace(
+ array('_', '\\'),
+ DIRECTORY_SEPARATOR,
+ $className
+ ) . '.php';
+ }
+}