* add phpunit as a dev dependency

* add some basic tests for UrlHelper::rewrite_relative()
 * fix UrlHelper::rewrite_relative() to work better on non-absolute
   relative URL paths

vendor/phpspec/prophecy/src/Prophecy/Argument/Token/CallbackToken.php

@@ -0,0 +1,75 @@
+<?php
+
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Prophecy\Argument\Token;
+
+use Prophecy\Exception\InvalidArgumentException;
+
+/**
+ * Callback-verified token.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+class CallbackToken implements TokenInterface
+{
+    private $callback;
+
+    /**
+     * Initializes token.
+     *
+     * @param callable $callback
+     *
+     * @throws \Prophecy\Exception\InvalidArgumentException
+     */
+    public function __construct($callback)
+    {
+        if (!is_callable($callback)) {
+            throw new InvalidArgumentException(sprintf(
+                'Callable expected as an argument to CallbackToken, but got %s.',
+                gettype($callback)
+            ));
+        }
+
+        $this->callback = $callback;
+    }
+
+    /**
+     * Scores 7 if callback returns true, false otherwise.
+     *
+     * @param $argument
+     *
+     * @return bool|int
+     */
+    public function scoreArgument($argument)
+    {
+        return call_user_func($this->callback, $argument) ? 7 : false;
+    }
+
+    /**
+     * Returns false.
+     *
+     * @return bool
+     */
+    public function isLast()
+    {
+        return false;
+    }
+
+    /**
+     * Returns string representation for token.
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return 'callback()';
+    }
+}