dom/bindings/parser/tests/test_optional_constraints.py

   1 import WebIDL
   2
   3
   4 def WebIDLTest(parser, harness):
   5     threw = False
   6     try:
   7         parser.parse(
   8             """
   9             interface OptionalConstraints1 {
  10               undefined foo(optional byte arg1, byte arg2);
  11             };
  12         """
  13         )
  14
  15         parser.finish()
  16     except WebIDL.WebIDLError:
  17         threw = True
  18
  19     harness.ok(
  20         not threw,
  21         "Should not have thrown on non-optional argument following "
  22         "optional argument.",
  23     )
  24
  25     parser = parser.reset()
  26     parser.parse(
  27         """
  28         interface OptionalConstraints2 {
  29           undefined foo(optional byte arg1 = 1, optional byte arg2 = 2,
  30                         optional byte arg3, optional byte arg4 = 4,
  31                         optional byte arg5, optional byte arg6 = 9);
  32         };
  33     """
  34     )
  35     results = parser.finish()
  36     args = results[0].members[0].signatures()[0][1]
  37     harness.check(len(args), 6, "Should have 6 arguments")
  38     harness.check(args[5].defaultValue.value, 9, "Should have correct default value")