dom/bindings/parser/tests/test_replaceable.py

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this
   3 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 import WebIDL
   6
   7
   8 def should_throw(parser, harness, message, code):
   9     parser = parser.reset()
  10     threw = False
  11     try:
  12         parser.parse(code)
  13         parser.finish()
  14     except WebIDL.WebIDLError:
  15         threw = True
  16
  17     harness.ok(threw, "Should have thrown: %s" % message)
  18
  19
  20 def WebIDLTest(parser, harness):
  21     # The [Replaceable] extended attribute MUST take no arguments.
  22     should_throw(
  23         parser,
  24         harness,
  25         "no arguments",
  26         """
  27         interface I {
  28           [Replaceable=X] readonly attribute long A;
  29         };
  30     """,
  31     )
  32
  33     # An attribute with the [Replaceable] extended attribute MUST NOT also be
  34     # declared with the [PutForwards] extended attribute.
  35     should_throw(
  36         parser,
  37         harness,
  38         "PutForwards",
  39         """
  40         interface I {
  41           [PutForwards=B, Replaceable] readonly attribute J A;
  42         };
  43         interface J {
  44           attribute long B;
  45         };
  46     """,
  47     )
  48
  49     # The [Replaceable] extended attribute MUST NOT be used on an attribute
  50     # that is not read only.
  51     should_throw(
  52         parser,
  53         harness,
  54         "writable attribute",
  55         """
  56         interface I {
  57           [Replaceable] attribute long A;
  58         };
  59     """,
  60     )
  61
  62     # The [Replaceable] extended attribute MUST NOT be used on a static
  63     # attribute.
  64     should_throw(
  65         parser,
  66         harness,
  67         "static attribute",
  68         """
  69         interface I {
  70           [Replaceable] static readonly attribute long A;
  71         };
  72     """,
  73     )
  74
  75     # The [Replaceable] extended attribute MUST NOT be used on an attribute
  76     # declared on a callback interface.
  77     should_throw(
  78         parser,
  79         harness,
  80         "callback interface",
  81         """
  82         callback interface I {
  83           [Replaceable] readonly attribute long A;
  84         };
  85     """,
  86     )