đã tạo được test case của createUser

vendor/php-webdriver/webdriver/lib/Support/XPathEscaper.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Facebook\WebDriver\Support;
+
+class XPathEscaper
+{
+    /**
+     * Converts xpath strings with both quotes and ticks into:
+     *   `foo'"bar` -> `concat('foo', "'" ,'"bar')`
+     *
+     * @param string $xpathToEscape The xpath to be converted.
+     * @return string The escaped string.
+     */
+    public static function escapeQuotes($xpathToEscape)
+    {
+        // Single quotes not present => we can quote in them
+        if (mb_strpos($xpathToEscape, "'") === false) {
+            return sprintf("'%s'", $xpathToEscape);
+        }
+
+        // Double quotes not present => we can quote in them
+        if (mb_strpos($xpathToEscape, '"') === false) {
+            return sprintf('"%s"', $xpathToEscape);
+        }
+
+        // Both single and double quotes are present
+        return sprintf(
+            "concat('%s')",
+            str_replace("'", "', \"'\" ,'", $xpathToEscape)
+        );
+    }
+}