diff -r 000000000000 -r 6474c204b198 js/src/gdb/tests/test-jsid.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/gdb/tests/test-jsid.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+# Tests for jsid pretty-printing
+
+assert_subprinter_registered('SpiderMonkey', 'jsid')
+
+run_fragment('jsid.simple')
+
+assert_pretty('string_id', '$jsid("moon")')
+assert_pretty('int_id', '$jsid(1729)')
+assert_pretty('void_id', 'JSID_VOID')
+assert_pretty('object_id', '$jsid((JSObject *)  [object global] delegate)')
+
+run_fragment('jsid.handles')
+
+assert_pretty('jsid_handle',         '$jsid("shovel")')
+assert_pretty('mutable_jsid_handle', '$jsid("shovel")')