1 files changed, 39 insertions, 0 deletions
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_variadic_constraints.py b/components/script/dom/bindings/codegen/parser/tests/test_variadic_constraints.py
new file mode 100644
index 00000000000..9cba22c5842
--- /dev/null
+++ b/components/script/dom/bindings/codegen/parser/tests/test_variadic_constraints.py
@@ -0,0 +1,39 @@
+def WebIDLTest(parser, harness):
+    threw = False
+    try:
+        results = parser.parse("""
+            interface VariadicConstraints1 {
+              void foo(byte... arg1, byte arg2);
+            };
+        """)
+
+    except:
+        threw = True
+
+    harness.ok(threw, "Should have thrown.")
+
+    threw = False
+    try:
+        results = parser.parse("""
+            interface VariadicConstraints2 {
+              void foo(byte... arg1, optional byte arg2);
+            };
+        """)
+
+    except:
+        threw = True
+
+    harness.ok(threw, "Should have thrown.")
+
+    threw = False
+    try:
+        results = parser.parse("""
+            interface VariadicConstraints3 {
+              void foo(optional byte... arg1);
+            };
+        """)
+
+    except:
+        threw = True
+
+    harness.ok(threw, "Should have thrown.")