Index: modules/simpletest/tests/database_test.test
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/tests/database_test.test,v
retrieving revision 1.105
diff -u -p -r1.105 database_test.test
--- modules/simpletest/tests/database_test.test	15 Dec 2010 06:52:54 -0000	1.105
+++ modules/simpletest/tests/database_test.test	22 Dec 2010 00:01:48 -0000
@@ -776,6 +776,16 @@ class DatabaseUpdateTestCase extends Dat
     $this->assertIdentical($num_matches, '1', t('Updated fields successfully.'));
   }
 
+  /**
+   * Test updating with expressions.
+   */
+  function testExpressionUpdate() {
+    db_query('UPDATE {test} SET age = :age WHERE id = :id', array(':age' => 1, ':id' => 1));
+    $num_rows = db_update('test')
+      ->expression('age', 'age * age')
+      ->execute();
+    $this->assertIdentical($num_rows, 3, t('Expression entered as straight SQL.'));
+  }
 }
 
 /**