1 files changed, 14 insertions, 0 deletions
diff --git a/modules/simpletest/tests/database_test.test b/modules/simpletest/tests/database_test.test
index e7ce14f7a..b58578e99 100644
--- a/modules/simpletest/tests/database_test.test
+++ b/modules/simpletest/tests/database_test.test
@@ -848,6 +848,20 @@ class DatabaseUpdateTestCase extends DatabaseTestCase {
       ->execute();
     $this->assertIdentical($num_rows, 3, 'Number of affected rows are returned.');
   }
+
+  /**
+   * Confirm that we can update the primary key of a record successfully.
+   */
+  function testPrimaryKeyUpdate() {
+    $num_updated = db_update('test')
+      ->fields(array('id' => 42, 'name' => 'John'))
+      ->condition('id', 1)
+      ->execute();
+    $this->assertIdentical($num_updated, 1, 'Updated 1 record.');
+
+    $saved_name= db_query('SELECT name FROM {test} WHERE id = :id', array(':id' => 42))->fetchField();
+    $this->assertIdentical($saved_name, 'John', 'Updated primary key successfully.');
+  }
 }
 
 /**