--- /dev/null
+<?php
+
+/*
+ * This file is part of the Mink package.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Mink\Exception;
+
+use Behat\Mink\Driver\DriverInterface;
+use Behat\Mink\Session;
+
+/**
+ * Exception thrown when an expected element is not found.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+class ElementNotFoundException extends ExpectationException
+{
+ /**
+ * Initializes exception.
+ *
+ * @param DriverInterface|Session $driver driver instance
+ * @param string $type element type
+ * @param string $selector element selector type
+ * @param string $locator element locator
+ */
+ public function __construct($driver, $type = null, $selector = null, $locator = null)
+ {
+ $message = '';
+
+ if (null !== $type) {
+ $message .= ucfirst($type);
+ } else {
+ $message .= 'Tag';
+ }
+
+ if (null !== $locator) {
+ if (null === $selector || in_array($selector, array('css', 'xpath'))) {
+ $selector = 'matching '.($selector ?: 'locator');
+ } else {
+ $selector = 'with '.$selector;
+ }
+ $message .= ' '.$selector.' "'.$locator.'"';
+ }
+
+ $message .= ' not found.';
+
+ parent::__construct($message, $driver);
+ }
+}