[es7] refactor and fix Object.values() / Object.entries()

test/mjsunit/harmony/object-entries.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --harmony-object-values-entries --harmony-proxies --harmony-reflect
+// Flags: --allow-natives-syntax
 
 function TestMeta() {
   assertEquals(1, Object.entries.length);
   assertEquals(Function.prototype, Object.getPrototypeOf(Object.entries));
+  assertEquals("entries", Object.entries.name);
+
+  var descriptor = Object.getOwnPropertyDescriptor(Object, "entries");
+  assertTrue(descriptor.writable);
+  assertFalse(descriptor.enumerable);
+  assertTrue(descriptor.configurable);
+
+  assertThrows(() => new Object.entries({}), TypeError);
 }
 TestMeta();
 
 
 function TestBasic() {
   var x = 16;
   var O = {
     d: 1,
     c: 3,
     [Symbol.iterator]: void 0,
     0: 123,
     1000: 456,
     [x * x]: "ducks",
     [`0x${(x * x).toString(16)}`]: "quack"
   };
   O.a = 2;
   O.b = 4;
   Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN });
   assertEquals([
     ["0", 123],
     ["256", "ducks"],
     ["1000", 456],
     ["d", 1],
     ["c", 3],
     ["0x100", "quack"],
     ["a", 2],
     ["b", 4]
   ], Object.entries(O));
   assertEquals(Object.entries(O), Object.keys(O).map(key => [key, O[key]]));
+
+  assertTrue(Array.isArray(Object.entries({})));
+  assertEquals(0, Object.entries({}).length);
 }
 TestBasic();
 
 
+function TestToObject() {
+  assertThrows(function() { Object.entries(); }, TypeError);
+  assertThrows(function() { Object.entries(null); }, TypeError);
+  assertThrows(function() { Object.entries(void 0); }, TypeError);
+}
+TestToObject();
+
+
 function TestOrder() {
   var O = {
     a: 1,
     [Symbol.iterator]: null
   };
   O[456] = 123;
   Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN });
+  var priv = %CreatePrivateSymbol("Secret");
+  O[priv] = 56;
 
   var log = [];
   var P = new Proxy(O, {
     ownKeys(target) {
       log.push("[[OwnPropertyKeys]]");
       return Reflect.ownKeys(target);
     },
     get(target, name) {
       log.push(`[[Get]](${JSON.stringify(name)})`);
       return Reflect.get(target, name);
     },
+    getOwnPropertyDescriptor(target, name) {
+      log.push(`[[GetOwnProperty]](${JSON.stringify(name)})`);
+      return Reflect.getOwnPropertyDescriptor(target, name);
+    },
     set(target, name, value) {
       assertUnreachable();
     }
   });
 
   assertEquals([["456", 123], ["a", 1]], Object.entries(P));
   assertEquals([
     "[[OwnPropertyKeys]]",
+    "[[GetOwnProperty]](\"456\")",
     "[[Get]](\"456\")",
-    "[[Get]](\"a\")"
+    "[[GetOwnProperty]](\"a\")",
+    "[[Get]](\"a\")",
+    "[[GetOwnProperty]](\"HIDDEN\")"
   ], log);
 }
 TestOrder();
+
+
+function TestOrderWithDuplicates() {
+  var O = {
+    a: 1,
+    [Symbol.iterator]: null
+  };
+  O[456] = 123;
+  Object.defineProperty(O, "HIDDEN", { enumerable: false, value: NaN });
+  var priv = %CreatePrivateSymbol("Secret");
+  O[priv] = 56;
+
+  var log = [];
+  var P = new Proxy(O, {
+    ownKeys(target) {
+      log.push("[[OwnPropertyKeys]]");
+      return ["a", Symbol.iterator, "a", "456", "HIDDEN", "HIDDEN", "456"];
+    },
+    get(target, name) {
+      log.push(`[[Get]](${JSON.stringify(name)})`);
+      return Reflect.get(target, name);
+    },
+    getOwnPropertyDescriptor(target, name) {
+      log.push(`[[GetOwnProperty]](${JSON.stringify(name)})`);
+      return Reflect.getOwnPropertyDescriptor(target, name);
+    },
+    set(target, name, value) {
+      assertUnreachable();
+    }
+  });
+
+  assertEquals([
+    ["a", 1],
+    ["a", 1],
+    ["456", 123],
+    ["456", 123]
+  ], Object.entries(P));
+  assertEquals([
+    "[[OwnPropertyKeys]]",
+    "[[GetOwnProperty]](\"a\")",
+    "[[Get]](\"a\")",
+    "[[GetOwnProperty]](\"a\")",
+    "[[Get]](\"a\")",
+    "[[GetOwnProperty]](\"456\")",
+    "[[Get]](\"456\")",
+    "[[GetOwnProperty]](\"HIDDEN\")",
+    "[[GetOwnProperty]](\"HIDDEN\")",
+    "[[GetOwnProperty]](\"456\")",
+    "[[Get]](\"456\")"
+  ], log);
+}
+TestOrderWithDuplicates();
+
+
+function TestPropertyFilter() {
+  var object = { prop3: 30 };
+  object[2] = 40;
+  object["prop4"] = 50;
+  Object.defineProperty(object, "prop5", { value: 60, enumerable: true });
+  Object.defineProperty(object, "prop6", { value: 70, enumerable: false });
+  Object.defineProperty(object, "prop7", {
+      enumerable: true, get() { return 80; }});
+  var sym = Symbol("prop8");
+  object[sym] = 90;
+
+  values = Object.entries(object);
+  assertEquals(5, values.length);
+  assertEquals([
+    [ "2", 40 ],
+    [ "prop3", 30 ],
+    [ "prop4", 50 ],
+    [ "prop5", 60 ],
+    [ "prop7", 80 ]
+  ], values);
+}
+TestPropertyFilter();
+
+
+function TestWithProxy() {
+  var obj1 = {prop1:10};
+  var proxy1 = new Proxy(obj1, { });
+  assertEquals([ [ "prop1", 10 ] ], Object.entries(proxy1));
+
+  var obj2 = {};
+  Object.defineProperty(obj2, "prop2", { value: 20, enumerable: true });
+  Object.defineProperty(obj2, "prop3", {
+      get() { return 30; }, enumerable: true });
+  var proxy2 = new Proxy(obj2, {
+    getOwnPropertyDescriptor(target, name) {
+      return Reflect.getOwnPropertyDescriptor(target, name);
+    }
+  });
+  assertEquals([ [ "prop2", 20 ], [ "prop3", 30 ] ], Object.entries(proxy2));
+
+  var obj3 = {};
+  var count = 0;
+  var proxy3 = new Proxy(obj3, {
+    get(target, property, receiver) {
+      return count++ * 5;
+    },
+    getOwnPropertyDescriptor(target, property) {
+      return { configurable: true, enumerable: true };
+    },
+    ownKeys(target) {
+      return [ "prop0", "prop1", Symbol("prop2"), Symbol("prop5") ];
+    }
+  });
+  assertEquals([ [ "prop0", 0 ], [ "prop1", 5 ] ], Object.entries(proxy3));
+}
+TestWithProxy();
+
+
+function TestMutateDuringEnumeration() {
+  var aDeletesB = {
+    get a() {
+      delete this.b;
+      return 1;
+    },
+    b: 2
+  };
+  assertEquals([ [ "a", 1 ] ], Object.entries(aDeletesB));
+
+  var aRemovesB = {
+    get a() {
+      Object.defineProperty(this, "b", { enumerable: false });
+      return 1;
+    },
+    b: 2
+  };
+  assertEquals([ [ "a", 1 ] ], Object.entries(aRemovesB));
+
+  var aAddsB = { get a() { this.b = 2; return 1; } };
+  assertEquals([ [ "a", 1 ] ], Object.entries(aAddsB));
+
+  var aMakesBEnumerable = {};
+  Object.defineProperty(aMakesBEnumerable, "a", {
+    get() {
+      Object.defineProperty(this, "b", { enumerable: true });
+      return 1;
+    },
+    enumerable: true
+  });
+  Object.defineProperty(aMakesBEnumerable, "b", {
+      value: 2, configurable:true, enumerable: false });
+  assertEquals([ [ "a", 1 ], [ "b", 2 ] ], Object.entries(aMakesBEnumerable));
+}
+TestMutateDuringEnumeration();