dom/bindings/parser/tests/test_double_null.py


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import WebIDL


def WebIDLTest(parser, harness):
    threw = False
    try:
        parser.parse(
            """
            interface DoubleNull {
              attribute byte?? foo;
            };
        """
        )

        parser.finish()
    except WebIDL.WebIDLError:
        threw = True

    harness.ok(threw, "Should have thrown.")