dom/bindings/parser/tests/test_variadic_constraints.py

   1 import WebIDL
   2
   3
   4 def WebIDLTest(parser, harness):
   5     threw = False
   6     try:
   7         parser.parse(
   8             """
   9             interface VariadicConstraints1 {
  10               undefined foo(byte... arg1, byte arg2);
  11             };
  12         """
  13         )
  14         parser.finish()
  15
  16     except WebIDL.WebIDLError:
  17         threw = True
  18
  19     harness.ok(
  20         threw,
  21         "Should have thrown on variadic argument followed by required " "argument.",
  22     )
  23
  24     parser = parser.reset()
  25     threw = False
  26     try:
  27         parser.parse(
  28             """
  29             interface VariadicConstraints2 {
  30               undefined foo(byte... arg1, optional byte arg2);
  31             };
  32         """
  33         )
  34         parser.finish()
  35     except WebIDL.WebIDLError:
  36         threw = True
  37
  38     harness.ok(
  39         threw,
  40         "Should have thrown on variadic argument followed by optional " "argument.",
  41     )
  42
  43     parser = parser.reset()
  44     threw = False
  45     try:
  46         parser.parse(
  47             """
  48             interface VariadicConstraints3 {
  49               undefined foo(optional byte... arg1);
  50             };
  51         """
  52         )
  53         parser.finish()
  54
  55     except WebIDL.WebIDLError:
  56         threw = True
  57
  58     harness.ok(
  59         threw,
  60         "Should have thrown on variadic argument explicitly flagged as " "optional.",
  61     )
  62
  63     parser = parser.reset()
  64     threw = False
  65     try:
  66         parser.parse(
  67             """
  68             interface VariadicConstraints4 {
  69               undefined foo(byte... arg1 = 0);
  70             };
  71         """
  72         )
  73         parser.finish()
  74     except WebIDL.WebIDLError:
  75         threw = True
  76
  77     harness.ok(threw, "Should have thrown on variadic argument with default value.")