đã tạo được test case của createUser

vendor/php-webdriver/webdriver/lib/Exception/Internal/RuntimeException.php

@@ -0,0 +1,28 @@
+<?php declare(strict_types=1);
+
+namespace Facebook\WebDriver\Exception\Internal;
+
+use Facebook\WebDriver\Exception\PhpWebDriverExceptionInterface;
+use Symfony\Component\Process\Process;
+
+/**
+ * Exception thrown if an error which can only be found on runtime occurs.
+ */
+class RuntimeException extends \RuntimeException implements PhpWebDriverExceptionInterface
+{
+    public static function forError(string $message): self
+    {
+        return new self($message);
+    }
+
+    public static function forDriverError(Process $process): self
+    {
+        return new self(
+            sprintf(
+                'Error starting driver executable "%s": %s',
+                $process->getCommandLine(),
+                $process->getErrorOutput()
+            )
+        );
+    }
+}