File: test_empty_sequence_default_value.py

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import WebIDL


def WebIDLTest(parser, harness):
    threw = False
    try:
        parser.parse(
            """
            interface X {
              const sequence<long> foo = [];
            };
        """
        )

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

    harness.ok(threw, "Constant cannot have [] as a default value")

    parser = parser.reset()

    parser.parse(
        """
        interface X {
          undefined foo(optional sequence<long> arg = []);
        };
    """
    )
    results = parser.finish()

    harness.ok(
        isinstance(
            results[0].members[0].signatures()[0][1][0].defaultValue,
            WebIDL.IDLEmptySequenceValue,
        ),
        "Should have IDLEmptySequenceValue as default value of argument",
    )

    parser = parser.reset()

    parser.parse(
        """
        dictionary X {
          sequence<long> foo = [];
        };
    """
    )
    results = parser.finish()

    harness.ok(
        isinstance(results[0].members[0].defaultValue, WebIDL.IDLEmptySequenceValue),
        "Should have IDLEmptySequenceValue as default value of dictionary member",
    )