Spec adjustments for well-known symbols

test/mjsunit/harmony/symbols.js

Index: test/mjsunit/harmony/symbols.js
diff --git a/test/mjsunit/harmony/symbols.js b/test/mjsunit/harmony/symbols.js
index d19aece5b17202f6bd1b9e841561f5691c56fc86..e7bf36040621d5541378614d2d5e657b1b2ea463 100644
--- a/test/mjsunit/harmony/symbols.js
+++ b/test/mjsunit/harmony/symbols.js
@@ -410,12 +410,29 @@ function TestGetOwnPropertySymbolsWithProto() {
 TestGetOwnPropertySymbolsWithProto()
 
 
-function TestRegistry() {
-  assertFalse(Symbol.for("@@create") === Symbol.create)
-  assertFalse(Symbol.for("@@iterator") === Symbol.iterator)
-  assertTrue(Symbol.keyFor(Symbol.create) === undefined)
-  assertTrue(Symbol.keyFor(Symbol.iterator) === undefined)
+function TestWellKnown() {
+  var symbols = [
+    "create", "hasInstance", "isConcatSpreadable", "isRegExp",
+    "iterator", "toStringTag", "unscopables"
+  ]
 
+  for (var i in symbols) {
+    var name = symbols[i]
+    var desc = Object.getOwnPropertyDescriptor(Symbol, name)
+    assertSame("symbol", typeof desc.value)
+    assertSame("Symbol(Symbol." + name + ")", desc.value.toString())
+    assertFalse(desc.writable)
+    assertFalse(desc.configurable)
+    assertFalse(desc.enumerable)
+
+    assertFalse(Symbol.for("Symbol." + name) === desc.value)
+    assertTrue(Symbol.keyFor(desc.value) === undefined)
+  }
+}
+TestWellKnown()
+
+
+function TestRegistry() {
   var symbol1 = Symbol.for("x1")
   var symbol2 = Symbol.for("x2")
   assertFalse(symbol1 === symbol2)