1 files changed, 14 insertions, 0 deletions
diff --git a/dom/bindings/parser/tests/test_builtin_filename.py b/dom/bindings/parser/tests/test_builtin_filename.py
new file mode 100644
index 0000000000..6c913bba82
--- /dev/null
+++ b/dom/bindings/parser/tests/test_builtin_filename.py
@@ -0,0 +1,14 @@
+import WebIDL
+
+
+def WebIDLTest(parser, harness):
+    parser.parse(
+        """
+        interface Test {
+          attribute long b;
+        };
+    """
+    )
+
+    attr = parser.finish()[0].members[0]
+    harness.check(attr.type.filename(), "<builtin>", "Filename on builtin type")