commit 5577956b99e1cf59f1185eb4caf3127283d66214
Author: Joel Pittet <joel@pittet.ca>
Date:   Wed Nov 27 12:55:01 2013 -0800

    added tests

diff --git a/core/modules/system/lib/Drupal/system/Tests/Common/RenderElementTypesTest.php b/core/modules/system/lib/Drupal/system/Tests/Common/RenderElementTypesTest.php
index 9ba4bf4..4fac932 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Common/RenderElementTypesTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Common/RenderElementTypesTest.php
@@ -113,4 +113,26 @@ function testHtmlTag() {
     $this->assertElements($elements);
   }
 
+  /**
+   * Tests system #type 'more_link'.
+   */
+  function testMoreLink() {
+    $elements = array(
+      // Test more_link anchor tag generation.
+      array(
+        'name' => "#type 'more_link' anchor tag generation",
+        'value' => array(
+          '#type' => 'more_link',
+          '#href' => 'admin/content',
+          '#attributes' => array(
+            'name' => 'description',
+            'class' => array('drupal', 'test'),
+          ),
+        ),
+        'expected' => '<div class="more-link"><a href="/admin/content" name="description" class="drupal test">More</a></div>',
+      ),
+    );
+    $this->assertElements($elements);
+  }
+
 }