diff -r 000000000000 -r 6474c204b198 dom/bindings/parser/tests/test_sanity.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/bindings/parser/tests/test_sanity.py	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+def WebIDLTest(parser, harness):
+    parser.parse("")
+    parser.finish()
+    harness.ok(True, "Parsing nothing doesn't throw.")
+    parser.parse("interface Foo {};")
+    parser.finish()
+    harness.ok(True, "Parsing a silly interface doesn't throw.")