Tests for proposal-well-formed-stringify

features.txt

@@ -99,6 +99,10 @@ Symbol.prototype.description
 # https://github.com/tc39/proposal-json-superset
 json-superset
 
+# Well-formed JSON.stringify
+# https://github.com/tc39/proposal-well-formed-stringify
+well-formed-json-stringify
+
 # Intl.ListFormat
 # https://github.com/tc39/proposal-intl-list-format
 Intl.ListFormat

test/built-ins/JSON/stringify/15.12.3-0-1.js

@@ -4,19 +4,13 @@
 /*---
 info: |
     This test should be run without any built-ins being added/augmented.
-    The name JSON must be bound to an object.
-    Section 15 says that every built-in Function object described in this
-    section � whether as a constructor, an ordinary function, or both � has
-    a length property whose value is an integer. Unless otherwise specified,
-    this value is equal to the largest number of named arguments shown in
-    the section headings for the function description, including optional
-    parameters.
-    This default applies to JSON.stringify, and it must exist as a function
-    taking 3 parameters.
+    The initial value of [[Configurable]] on JSON is true. This means we
+    should be able to delete (8.6.2.5) the stringify and parse properties.
 es5id: 15.12.3-0-1
-description: JSON.stringify must exist as be a function
+description: JSON.stringify must be deletable (configurable)
 ---*/
 
-var f = JSON.stringify;
+var o = JSON;
+var desc = Object.getOwnPropertyDescriptor(o, "stringify");
 
-assert.sameValue(typeof(f), "function", 'typeof(f)');
+assert.sameValue(desc.configurable, true, 'desc.configurable');

test/built-ins/JSON/stringify/15.12.3-0-2.js

@@ -14,7 +14,7 @@ info: |
     This default applies to JSON.stringify, and it must exist as a function
     taking 3 parameters.
 es5id: 15.12.3-0-2
-description: JSON.stringify must exist as be a function taking 3 parameters
+description: JSON.stringify must exist as a function taking 3 parameters
 ---*/
 
 var f = JSON.stringify;

test/built-ins/JSON/stringify/15.12.3-11-2.js

@@ -4,7 +4,7 @@
 /*---
 es5id: 15.12.3-11-2
 description: >
-    A JSON.stringify replacer function works is applied to a top level
+    A JSON.stringify replacer function is applied to a top level
     undefined value.
 ---*/