1 files changed, 100 insertions, 0 deletions
diff --git a/components/script/dom/bindings/codegen/parser/tests/test_stringifier.py b/components/script/dom/bindings/codegen/parser/tests/test_stringifier.py
index 14c2c5226fc..deabdc5ec81 100644
--- a/components/script/dom/bindings/codegen/parser/tests/test_stringifier.py
+++ b/components/script/dom/bindings/codegen/parser/tests/test_stringifier.py
@@ -44,3 +44,103 @@ def WebIDLTest(parser, harness):
 
     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")