servo/components/script/dom/bindings/codegen/parser/tests/test_stringifier.py

import WebIDL

def WebIDLTest(parser, harness):
    parser.parse("""
        interface TestStringifier {
          stringifier;
        };
    """)

    results = parser.finish()

    harness.ok(isinstance(results[0].members[0], WebIDL.IDLMethod),
               "Stringifer should be method")

    parser = parser.reset()

    threw = False
    try:
        parser.parse("""
            interface TestStringifier {
              stringifier;
              stringifier;
            };
        """)
        results = parser.finish()
    except:
        threw = True

    harness.ok(threw, "Should not allow two 'stringifier;'")

    parser = parser.reset()

    threw = False
    try:
        parser.parse("""
            interface TestStringifier {
              stringifier;
              stringifier DOMString foo();
            };
        """)
        results = parser.finish()
    except:
        threw = True

    harness.ok(threw, "Should not allow a 'stringifier;' and a 'stringifier()'")

    parser = parser.reset()
    parser.parse("""
        interface TestStringifier {
            stringifier attribute DOMString foo;
        };
    """)
    results = parser.finish()
    harness.ok(isinstance(results[0].members[0], WebIDL.IDLAttribute),
               "Stringifier attribute should be an attribute")
    stringifier = results[0].members[1]
    harness.ok(isinstance(stringifier, WebIDL.IDLMethod),
               "Stringifier attribute should insert a method")
    harness.ok(stringifier.isStringifier(),
               "Inserted method should be a stringifier")

    parser = parser.reset()
    parser.parse("""
        interface TestStringifier {};
        interface mixin TestStringifierMixin {
            stringifier attribute DOMString foo;
        };
        TestStringifier includes TestStringifierMixin;
    """)
    results = parser.finish()
    harness.ok(isinstance(results[0].members[0], WebIDL.IDLAttribute),
               "Stringifier attribute should be an attribute")
    stringifier = results[0].members[1]
    harness.ok(isinstance(stringifier, WebIDL.IDLMethod),
               "Stringifier attribute should insert a method")
    harness.ok(stringifier.isStringifier(),
               "Inserted method should be a stringifier")

    parser = parser.reset()
    parser.parse("""
        interface TestStringifier {
            stringifier attribute USVString foo;
        };
    """)
    results = parser.finish()
    stringifier = results[0].members[1]
    harness.ok(stringifier.signatures()[0][0].isUSVString(),
               "Stringifier attributes should allow USVString")

    parser = parser.reset()
    parser.parse("""
        interface TestStringifier {
            [Throws, NeedsSubjectPrincipal]
            stringifier attribute USVString foo;
        };
    """)
    results = parser.finish()
    stringifier = results[0].members[1]
    harness.ok(stringifier.getExtendedAttribute("Throws"),
               "Stringifier attributes should support [Throws]")
    harness.ok(stringifier.getExtendedAttribute("NeedsSubjectPrincipal"),
               "Stringifier attributes should support [NeedsSubjectPrincipal]")

    parser = parser.reset()
    threw = False
    try:
        parser.parse("""
            interface TestStringifier {
              stringifier attribute ByteString foo;
            };
        """)
        results = parser.finish()
    except:
        threw = True

    harness.ok(threw, "Should not allow ByteString")

    parser = parser.reset()
    threw = False
    try:
        parser.parse("""
            interface TestStringifier {
              stringifier;
              stringifier attribute DOMString foo;
            };
        """)
        results = parser.finish()
    except:
        threw = True

    harness.ok(threw, "Should not allow a 'stringifier;' and a stringifier attribute")

    parser = parser.reset()
    threw = False
    try:
        parser.parse("""
            interface TestStringifier {
              stringifier attribute DOMString foo;
              stringifier attribute DOMString bar;
            };
        """)
        results = parser.finish()
    except:
        threw = True

    harness.ok(threw, "Should not allow multiple stringifier attributes")