Implement Harmony sets and maps.

test/mjsunit/harmony/weakmaps.js

-// Copyright 2011 the V8 project authors. All rights reserved.
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-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Flags: --harmony-weakmaps --expose-gc
-
-
-// Test valid getter and setter calls
-var m = new WeakMap;
-assertDoesNotThrow(function () { m.get(new Object) });
-assertDoesNotThrow(function () { m.set(new Object) });
-assertDoesNotThrow(function () { m.has(new Object) });
-assertDoesNotThrow(function () { m.delete(new Object) });
-
-
-// Test invalid getter and setter calls
-var m = new WeakMap;
-assertThrows(function () { m.get(undefined) }, TypeError);
-assertThrows(function () { m.set(undefined, 0) }, TypeError);
-assertThrows(function () { m.get(0) }, TypeError);
-assertThrows(function () { m.set(0, 0) }, TypeError);
-assertThrows(function () { m.get('a-key') }, TypeError);
-assertThrows(function () { m.set('a-key', 0) }, TypeError);
-
-
-// Test expected mapping behavior
-var m = new WeakMap;
-function TestMapping(map, key, value) {
-  map.set(key, value);
-  assertSame(value, map.get(key));
-}
-TestMapping(m, new Object, 23);
-TestMapping(m, new Object, 'the-value');
-TestMapping(m, new Object, new Object);
-
-
-// Test expected querying behavior
-var m = new WeakMap;
-var key = new Object;
-TestMapping(m, key, 'to-be-present');
-assertTrue(m.has(key));
-assertFalse(m.has(new Object));
-TestMapping(m, key, undefined);
-assertFalse(m.has(key));
-assertFalse(m.has(new Object));
-
-
-// Test expected deletion behavior
-var m = new WeakMap;
-var key = new Object;
-TestMapping(m, key, 'to-be-deleted');
-assertTrue(m.delete(key));
-assertFalse(m.delete(key));
-assertFalse(m.delete(new Object));
-assertSame(m.get(key), undefined);
-
-
-// Test GC of map with entry
-var m = new WeakMap;
-var key = new Object;
-m.set(key, 'not-collected');
-gc();
-assertSame('not-collected', m.get(key));
-
-
-// Test GC of map with chained entries
-var m = new WeakMap;
-var head = new Object;
-for (key = head, i = 0; i < 10; i++, key = m.get(key)) {
-  m.set(key, new Object);
-}
-gc();
-var count = 0;
-for (key = head; key != undefined; key = m.get(key)) {
-  count++;
-}
-assertEquals(11, count);
-
-
-// Test property attribute [[Enumerable]]
-var m = new WeakMap;
-function props(x) {
-  var array = [];
-  for (var p in x) array.push(p);
-  return array.sort();
-}
-assertArrayEquals([], props(WeakMap));
-assertArrayEquals([], props(WeakMap.prototype));
-assertArrayEquals([], props(m));
-
-
-// Test arbitrary properties on weak maps
-var m = new WeakMap;
-function TestProperty(map, property, value) {
-  map[property] = value;
-  assertEquals(value, map[property]);
-}
-for (i = 0; i < 20; i++) {
-  TestProperty(m, i, 'val' + i);
-  TestProperty(m, 'foo' + i, 'bar' + i);
-}
-TestMapping(m, new Object, 'foobar');
-
-
-// Test direct constructor call
-var m = WeakMap();
-assertTrue(m instanceof WeakMap);
-
-
-// Test some common JavaScript idioms
-var m = new WeakMap;
-assertTrue(m instanceof WeakMap);
-assertTrue(WeakMap.prototype.set instanceof Function)
-assertTrue(WeakMap.prototype.get instanceof Function)
-assertTrue(WeakMap.prototype.has instanceof Function)
-assertTrue(WeakMap.prototype.delete instanceof Function)
-
-
-// Regression test for WeakMap prototype.
-assertTrue(WeakMap.prototype.constructor === WeakMap)
-assertTrue(Object.getPrototypeOf(WeakMap.prototype) === Object.prototype)
-
-
-// Regression test for issue 1617: The prototype of the WeakMap constructor
-// needs to be unique (i.e. different from the one of the Object constructor).
-assertFalse(WeakMap.prototype === Object.prototype);
-var o = Object.create({});
-assertFalse("get" in o);
-assertFalse("set" in o);
-assertEquals(undefined, o.get);
-assertEquals(undefined, o.set);
-var o = Object.create({}, { myValue: {
-  value: 10,
-  enumerable: false,
-  configurable: true,
-  writable: true
-}});
-assertEquals(10, o.myValue);
-
-
-// Stress Test
-// There is a proposed stress-test available at the es-discuss mailing list
-// which cannot be reasonably automated.  Check it out by hand if you like:
-// https://mail.mozilla.org/pipermail/es-discuss/2011-May/014096.html