Reland "Implement ES6 symbol registry and predefined 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 26adb74660f3d7a05a8025db47a72eb072f47446..d19aece5b17202f6bd1b9e841561f5691c56fc86 100644
--- a/test/mjsunit/harmony/symbols.js
+++ b/test/mjsunit/harmony/symbols.js
@@ -410,15 +410,42 @@ function TestGetOwnPropertySymbolsWithProto() {
 TestGetOwnPropertySymbolsWithProto()
 
 
-function TestGetOwnPropertySymbolsWithPrivateSymbols() {
-  var privateSymbol = %CreatePrivateSymbol("private")
-  var publicSymbol = Symbol()
-  var publicSymbol2 = Symbol()
-  var obj = {}
-  obj[publicSymbol] = 1
-  obj[privateSymbol] = 2
-  obj[publicSymbol2] = 3
-  var syms = Object.getOwnPropertySymbols(obj)
-  assertEquals(syms, [publicSymbol, publicSymbol2])
+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)
+
+  var symbol1 = Symbol.for("x1")
+  var symbol2 = Symbol.for("x2")
+  assertFalse(symbol1 === symbol2)
+
+  assertSame(symbol1, Symbol.for("x1"))
+  assertSame(symbol2, Symbol.for("x2"))
+  assertSame("x1", Symbol.keyFor(symbol1))
+  assertSame("x2", Symbol.keyFor(symbol2))
+
+  assertSame(Symbol.for("1"), Symbol.for(1))
+  assertThrows(function() { Symbol.keyFor("bla") }, TypeError)
+  assertThrows(function() { Symbol.keyFor({}) }, TypeError)
+
+  var realm = Realm.create()
+  assertFalse(Symbol === Realm.eval(realm, "Symbol"))
+  assertFalse(Symbol.for === Realm.eval(realm, "Symbol.for"))
+  assertFalse(Symbol.keyFor === Realm.eval(realm, "Symbol.keyFor"))
+  assertSame(Symbol.create, Realm.eval(realm, "Symbol.create"))
+  assertSame(Symbol.iterator, Realm.eval(realm, "Symbol.iterator"))
+
+  assertSame(symbol1, Realm.eval(realm, "Symbol.for")("x1"))
+  assertSame(symbol1, Realm.eval(realm, "Symbol.for('x1')"))
+  assertSame("x1", Realm.eval(realm, "Symbol.keyFor")(symbol1))
+  Realm.shared = symbol1
+  assertSame("x1", Realm.eval(realm, "Symbol.keyFor(Realm.shared)"))
+
+  var symbol3 = Realm.eval(realm, "Symbol.for('x3')")
+  assertFalse(symbol1 === symbol3)
+  assertFalse(symbol2 === symbol3)
+  assertSame(symbol3, Symbol.for("x3"))
+  assertSame("x3", Symbol.keyFor(symbol3))
 }
-TestGetOwnPropertySymbolsWithPrivateSymbols()
+TestRegistry()