add helper method to generate a simple random string

src/Support/Str.php

@@ -9,6 +9,25 @@ namespace Pest\Support;
  */
 final class Str
 {
+    /**
+     * Pool of alpha-numeric characters for generating (unsafe) random strings
+     * from.
+     */
+    private const POOL = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+
+    /**
+     * Create a (unsecure & non-cryptographically safe) random alpha-numeric
+     * string value.
+     *
+     * @param int $length The length of the resulting randomized string.
+     * @return string
+     * @see https://github.com/laravel/framework/blob/4.2/src/Illuminate/Support/Str.php#L240-L242
+     */
+    public static function random(int $length = 16): string
+    {
+        return substr(str_shuffle(str_repeat(self::POOL, 5)), 0, $length);
+    }
+
     /**
      * Checks if the given `$target` starts with the given `$search`.
      */