--- modules/simpletest/tests/custom_rewrite_url_inbound.inc	2008-11-06 13:53:29.000000000 +0100
+++ modules/simpletest/tests/custom_rewrite_url_inbound.test	2008-11-06 13:52:09.000000000 +0100
@@ -1,11 +1,62 @@
-<?
+<?php
 // $Id
-/*** SHIT OAOAOAOAO
+/**
+ * SimpleTest case to test the functionality of the custom_url_rewrite_inbound() function.
+ *
+ */
+class CustomUrlRewriteInboundTestCase extends DrupalWebTestCase {
+  /**
+   * Implementation of getInfo().
+   *
+   * @return array
+   */
+  function getInfo() {
+    return array(
+      'name' => t('Custom url rewrite inbound test'),
+      'description' => t('Test for custom_url_rewrite_inbound function.'),
+      'group' => t('Path'),
+    );
+  }
+
+  /**
+   * Tests the drupal_get_normal_path function without having included the custom_url_rewrite_inbound function.
+   */
+  function testCustomUrlRewriteInboundWithoutFunction() {
+    $id = $this->randomName();
+    $inbound_path = 'foobar/' . $id;
+    $real_path    = 'node/' . $id;
+
+    $found_path = drupal_get_normal_path($inbound_path);
+    $this->assertNotEqual($found_path, $real_path, t('Inbound path does not get rewritten because the function is not yet included.'));
+  }
+
+  /**
+   * Tests a successful rewrite by the drupal_get_normal_path function.
+   */
+  function testCustomUrlRewriteInbound() {
+    // This function would normally be in settings.php, so we're simulating that by including it here.
+    include(drupal_get_path('module', 'simpletest') . '/tests/custom_rewrite_url_inbound.inc');
 
-function custom_url_rewrite_inbound(&$result, $path, $path_language) {
-  global $user;
-  if (preg_match('|^foobar(/.*)|', $path, $matches)) {
-      $result = 'node' . $matches[1];
+    $id = $this->randomName();
+    $inbound_path = 'foobar/' . $id;
+    $real_path    = 'node/' . $id;
+
+    $found_path = drupal_get_normal_path($inbound_path);
+    $this->assertEqual($found_path, $real_path, t('Inbound path gets rewritten when function is defined.'));
   }
 
-}
\ No newline at end of file
+  /**
+   * Tests the output of the drupal_get_normal_path function with a path that can't be rewritten.
+   */
+  function testCustomUrlRewriteInboundNoMatch() {
+
+    include(drupal_get_path('module', 'simpletest') . '/tests/custom_rewrite_url_inbound.inc');
+
+    $id = $this->randomName();
+    $inbound_path = 'no_match/' . $id;
+    $real_path    = 'node/' . $id;
+
+    $found_path = drupal_get_normal_path($inbound_path);
+    $this->assertNotEqual($found_path, $real_path, t('Inbound path does not match any of the patterns defined in the custom_url_rewrite_inbound function'));
+  }
+}