Update the WebIDL parser

components/script/dom/bindings/codegen/parser/tests/test_lenientSetter.py

@@ -0,0 +1,58 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+def should_throw(parser, harness, message, code):
+    parser = parser.reset();
+    threw = False
+    try:
+        parser.parse(code)
+        parser.finish()
+    except:
+        threw = True
+
+    harness.ok(threw, "Should have thrown: %s" % message)
+
+
+def WebIDLTest(parser, harness):
+    # The [LenientSetter] extended attribute MUST take no arguments.
+    should_throw(parser, harness, "no arguments", """
+        interface I {
+          [LenientSetter=X] readonly attribute long A;
+        };
+    """)
+
+    # An attribute with the [LenientSetter] extended attribute MUST NOT
+    # also be declared with the [PutForwards] extended attribute.
+    should_throw(parser, harness, "PutForwards", """
+        interface I {
+          [PutForwards=B, LenientSetter] readonly attribute J A;
+        };
+        interface J {
+          attribute long B;
+        };
+    """)
+
+    # An attribute with the [LenientSetter] extended attribute MUST NOT
+    # also be declared with the [Replaceable] extended attribute.
+    should_throw(parser, harness, "Replaceable", """
+        interface I {
+          [Replaceable, LenientSetter] readonly attribute J A;
+        };
+    """)
+
+    # The [LenientSetter] extended attribute MUST NOT be used on an
+    # attribute that is not read only.
+    should_throw(parser, harness, "writable attribute", """
+        interface I {
+          [LenientSetter] attribute long A;
+        };
+    """)
+
+    # The [LenientSetter] extended attribute MUST NOT be used on a
+    # static attribute.
+    should_throw(parser, harness, "static attribute", """
+        interface I {
+          [LenientSetter] static readonly attribute long A;
+        };
+    """)