đã tạo được test case của createUser

vendor/php-webdriver/webdriver/lib/Remote/FileDetector.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Facebook\WebDriver\Remote;
+
+interface FileDetector
+{
+    /**
+     * Try to detect whether the given $file is a file or not. Return the path
+     * of the file. Otherwise, return null.
+     *
+     * @param string $file
+     *
+     * @return null|string The path of the file.
+     */
+    public function getLocalFile($file);
+}