dom/bindings/parser/tests/test_union_nullable.py

   1 import WebIDL
   2
   3
   4 def WebIDLTest(parser, harness):
   5     threw = False
   6     try:
   7         parser.parse(
   8             """
   9             interface OneNullableInUnion {
  10               undefined foo((object? or DOMString?) arg);
  11             };
  12         """
  13         )
  14
  15         parser.finish()
  16     except WebIDL.WebIDLError:
  17         threw = True
  18
  19     harness.ok(threw, "Two nullable member types of a union should have thrown.")
  20
  21     parser.reset()
  22     threw = False
  23
  24     try:
  25         parser.parse(
  26             """
  27             interface NullableInNullableUnion {
  28               undefined foo((object? or DOMString)? arg);
  29             };
  30         """
  31         )
  32
  33         parser.finish()
  34     except WebIDL.WebIDLError:
  35         threw = True
  36
  37     harness.ok(
  38         threw,
  39         "A nullable union type with a nullable member type should have " "thrown.",
  40     )
  41
  42     parser.reset()
  43     threw = False
  44
  45     try:
  46         parser.parse(
  47             """
  48             interface NullableInUnionNullableUnionHelper {
  49             };
  50             interface NullableInUnionNullableUnion {
  51               undefined foo(((object? or DOMString) or NullableInUnionNullableUnionHelper)? arg);
  52             };
  53         """
  54         )
  55
  56         parser.finish()
  57     except WebIDL.WebIDLError:
  58         threw = True
  59
  60     harness.ok(
  61         threw,
  62         "A nullable union type with a nullable member type should have " "thrown.",
  63     )