Re^3-land "Ship promises and weak collections"

test/mjsunit/harmony/collections.js

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-// Flags: --harmony-collections --harmony-weak-collections
+// Flags: --harmony-collections
 // Flags: --expose-gc --allow-natives-syntax
 
 
 // Test valid getter and setter calls on Sets and WeakSets
 function TestValidSetCalls(m) {
   assertDoesNotThrow(function () { m.add(new Object) });
   assertDoesNotThrow(function () { m.has(new Object) });
   assertDoesNotThrow(function () { m.delete(new Object) });
 }
 TestValidSetCalls(new Set);
@@ skipping 244 matching lines @@
 
 
 // Test name of constructor.
 assertEquals("Set", Set.name);
 assertEquals("Map", Map.name);
 assertEquals("WeakMap", WeakMap.name);
 assertEquals("WeakSet", WeakSet.name);
 
 
 // Test prototype property of Set, Map, WeakMap and WeakSet.
-function TestPrototype(C) {
+// TODO(2793): Should all be non-writable, and the extra flag removed.
+function TestPrototype(C, writable) {
   assertTrue(C.prototype instanceof Object);
   assertEquals({
     value: {},
-    writable: true,  // TODO(2793): This should be non-writable.
+    writable: writable,
     enumerable: false,
     configurable: false
   }, Object.getOwnPropertyDescriptor(C, "prototype"));
 }
-TestPrototype(Set);
-TestPrototype(Map);
-TestPrototype(WeakMap);
-TestPrototype(WeakSet);
+TestPrototype(Set, true);
+TestPrototype(Map, true);
+TestPrototype(WeakMap, false);
+TestPrototype(WeakSet, false);
 
 
 // Test constructor property of the Set, Map, WeakMap and WeakSet prototype.
 function TestConstructor(C) {
   assertFalse(C === Object.prototype.constructor);
   assertSame(C, C.prototype.constructor);
   assertSame(C, (new C).__proto__.constructor);
 }
 TestConstructor(Set);
 TestConstructor(Map);
@@ skipping 528 matching lines @@
 
   var accumulated = 0;
   map.forEach(function(v) {
     accumulated += v;
     if (v % 10 === 0) {
       gc();
     }
   });
   assertEquals(4950, accumulated);
 })();