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diff --git a/deps/v8/test/mjsunit/es6/reflect-construct.js b/deps/v8/test/mjsunit/es6/reflect-construct.js
new file mode 100644
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+++ b/deps/v8/test/mjsunit/es6/reflect-construct.js
@@ -0,0 +1,376 @@
+// Copyright 2014 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.
+
+
+(function testReflectConstructArity() {
+  assertEquals(2, Reflect.construct.length);
+})();
+
+
+(function testReflectConstructNonConstructor() {
+  assertThrows(function() {
+    new Reflect.construct(function(){}, []);
+  }, TypeError);
+})();
+
+
+(function testReflectConstructBasic() {
+  function Constructor() { "use strict"; }
+  assertInstanceof(Reflect.construct(Constructor, []), Constructor);
+})();
+
+
+(function testReflectConstructBasicSloppy() {
+  function Constructor() {}
+  assertInstanceof(Reflect.construct(Constructor, []), Constructor);
+})();
+
+
+(function testReflectConstructReturnSomethingElseStrict() {
+  var R = {};
+  function Constructor() { "use strict"; return R; }
+  assertSame(R, Reflect.construct(Constructor, []));
+})();
+
+
+(function testReflectConstructReturnSomethingElseSloppy() {
+  var R = {};
+  function Constructor() { return R; }
+  assertSame(R, Reflect.construct(Constructor, []));
+})();
+
+
+(function testReflectConstructNewTargetStrict() {
+  "use strict";
+  function Constructor() { this[9] = 1; }
+  var O = Reflect.construct(Constructor, [], Array);
+  assertEquals(1, O[9]);
+  // Ordinary object with Array.prototype --- no exotic Array magic
+  assertFalse(Array.isArray(O));
+  assertEquals(0, O.length);
+  assertSame(Array.prototype, Object.getPrototypeOf(O));
+})();
+
+
+(function testReflectConstructNewTargetSloppy() {
+  function Constructor() { this[9] = 1; }
+  var O = Reflect.construct(Constructor, [], Array);
+  assertEquals(1, O[9]);
+  // Ordinary object with Array.prototype --- no exotic Array magic
+  assertFalse(Array.isArray(O));
+  assertEquals(0, O.length);
+  assertSame(Array.prototype, Object.getPrototypeOf(O));
+})();
+
+
+(function testReflectConstructNewTargetStrict2() {
+  "use strict";
+  function Constructor() { this[9] = 1; }
+  Constructor.prototype.add = function(x) {
+    this[this.length] = x; return this;
+  }
+  var O = Reflect.construct(Array, [1, 2, 3], Constructor);
+  // Exotic Array object with Constructor.prototype
+  assertTrue(Array.isArray(O));
+  assertSame(Constructor.prototype, Object.getPrototypeOf(O));
+  assertFalse(O instanceof Array);
+  assertEquals(3, O.length);
+  assertEquals(undefined, O[9]);
+  assertSame(O, O.add(4));
+  assertEquals(4, O.length);
+  assertEquals(4, O[3]);
+})();
+
+
+(function testReflectConstructNewTargetSloppy2() {
+  function Constructor() { this[9] = 1; }
+  Constructor.prototype.add = function(x) {
+    this[this.length] = x; return this;
+  }
+  var O = Reflect.construct(Array, [1, 2, 3], Constructor);
+  // Exotic Array object with Constructor.prototype
+  assertTrue(Array.isArray(O));
+  assertSame(Constructor.prototype, Object.getPrototypeOf(O));
+  assertFalse(O instanceof Array);
+  assertEquals(3, O.length);
+  assertEquals(undefined, O[9]);
+  assertSame(O, O.add(4));
+  assertEquals(4, O.length);
+  assertEquals(4, O[3]);
+})();
+
+
+(function testReflectConstructNewTargetStrict3() {
+  "use strict";
+  function A() {}
+  function B() {}
+  var O = Reflect.construct(A, [], B);
+  // TODO(caitp): bug: newTarget prototype is not used if it is not
+  // explicitly set.
+  //assertSame(B.prototype, Object.getPrototypeOf(O));
+})();
+
+
+(function testReflectConstructNewTargetSloppy3() {
+  function A() {}
+  function B() {}
+  var O = Reflect.construct(A, [], B);
+  // TODO(caitp): bug: newTarget prototype is not used if it is not
+  // explicitly set.
+  //assertSame(B.prototype, Object.getPrototypeOf(O));
+})();
+
+
+(function testAppliedArgumentsLength() {
+  function lengthStrict() { 'use strict'; this.a = arguments.length; }
+  function lengthSloppy() { this.a = arguments.length; }
+
+  assertEquals(0, Reflect.construct(lengthStrict, []).a);
+  assertEquals(0, Reflect.construct(lengthSloppy, []).a);
+  assertEquals(0, Reflect.construct(lengthStrict, {}).a);
+  assertEquals(0, Reflect.construct(lengthSloppy, {}).a);
+
+  for (var i = 0; i < 256; ++i) {
+    assertEquals(i, Reflect.construct(lengthStrict, new Array(i)).a);
+    assertEquals(i, Reflect.construct(lengthSloppy, new Array(i)).a);
+    assertEquals(i, Reflect.construct(lengthStrict, { length: i }).a);
+    assertEquals(i, Reflect.construct(lengthSloppy, { length: i }).a);
+  }
+})();
+
+
+(function testAppliedArgumentsLengthThrows() {
+  function noopStrict() { 'use strict'; }
+  function noopSloppy() { }
+  function MyError() {}
+
+  var argsList = {};
+  Object.defineProperty(argsList, "length", {
+    get: function() { throw new MyError(); }
+  });
+
+  assertThrows(function() {
+    Reflect.construct(noopStrict, argsList);
+  }, MyError);
+
+  assertThrows(function() {
+    Reflect.construct(noopSloppy, argsList);
+  }, MyError);
+})();
+
+
+(function testAppliedArgumentsElementThrows() {
+  function noopStrict() { 'use strict'; }
+  function noopSloppy() { }
+  function MyError() {}
+
+  var argsList = { length: 1 };
+  Object.defineProperty(argsList, "0", {
+    get: function() { throw new MyError(); }
+  });
+
+  assertThrows(function() {
+    Reflect.construct(noopStrict, argsList);
+  }, MyError);
+
+  assertThrows(function() {
+    Reflect.construct(noopSloppy, argsList);
+  }, MyError);
+})();
+
+
+(function testAppliedNonFunctionStrict() {
+  'use strict';
+  assertThrows(function() { Reflect.construct(void 0, []); }, TypeError);
+  assertThrows(function() { Reflect.construct(null, []); }, TypeError);
+  assertThrows(function() { Reflect.construct(123, []); }, TypeError);
+  assertThrows(function() { Reflect.construct("str", []); }, TypeError);
+  assertThrows(function() { Reflect.construct(Symbol("x"), []); }, TypeError);
+  assertThrows(function() { Reflect.construct(/123/, []); }, TypeError);
+  assertThrows(function() { Reflect.construct(NaN, []); }, TypeError);
+  assertThrows(function() { Reflect.construct({}, []); }, TypeError);
+  assertThrows(function() { Reflect.construct([], []); }, TypeError);
+})();
+
+
+(function testAppliedNonFunctionSloppy() {
+  assertThrows(function() { Reflect.construct(void 0, []); }, TypeError);
+  assertThrows(function() { Reflect.construct(null, []); }, TypeError);
+  assertThrows(function() { Reflect.construct(123, []); }, TypeError);
+  assertThrows(function() { Reflect.construct("str", []); }, TypeError);
+  assertThrows(function() { Reflect.construct(Symbol("x"), []); }, TypeError);
+  assertThrows(function() { Reflect.construct(/123/, []); }, TypeError);
+  assertThrows(function() { Reflect.construct(NaN, []); }, TypeError);
+  assertThrows(function() { Reflect.construct({}, []); }, TypeError);
+  assertThrows(function() { Reflect.construct([], []); }, TypeError);
+})();
+
+
+(function testAppliedArgumentsNonList() {
+  function noopStrict() { 'use strict'; }
+  function noopSloppy() {}
+  assertThrows(function() { Reflect.construct(noopStrict, null); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopSloppy, null); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopStrict, 1); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopSloppy, 1); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopStrict, "BAD"); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopSloppy, "BAD"); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopStrict, true); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopSloppy, true); }, TypeError);
+  var sym = Symbol("x");
+  assertThrows(function() { Reflect.construct(noopStrict, sym); }, TypeError);
+  assertThrows(function() { Reflect.construct(noopSloppy, sym); }, TypeError);
+})();
+
+
+(function testAppliedArgumentValue() {
+  function firstStrict(a) { 'use strict'; this.a = a; }
+  function firstSloppy(a) { this.a = a; }
+  function lastStrict(a) {
+    'use strict'; this.a = arguments[arguments.length - 1]; }
+  function lastSloppy(a) { this.a = arguments[arguments.length - 1]; }
+  function sumStrict() {
+    'use strict';
+    var sum = arguments[0];
+    for (var i = 1; i < arguments.length; ++i) {
+      sum += arguments[i];
+    }
+    this.a = sum;
+  }
+  function sumSloppy() {
+    var sum = arguments[0];
+    for (var i = 1; i < arguments.length; ++i) {
+      sum += arguments[i];
+    }
+    this.a = sum;
+  }
+
+  assertEquals("OK!", Reflect.construct(firstStrict, ["OK!"]).a);
+  assertEquals("OK!", Reflect.construct(firstSloppy, ["OK!"]).a);
+  assertEquals("OK!", Reflect.construct(firstStrict,
+                                        { 0: "OK!", length: 1 }).a);
+  assertEquals("OK!", Reflect.construct(firstSloppy,
+                                        { 0: "OK!", length: 1 }).a);
+  assertEquals("OK!", Reflect.construct(lastStrict,
+                                        [0, 1, 2, 3, 4, 5, 6, 7, 8, "OK!"]).a);
+  assertEquals("OK!", Reflect.construct(lastSloppy,
+                                        [0, 1, 2, 3, 4, 5, 6, 7, 8, "OK!"]).a);
+  assertEquals("OK!", Reflect.construct(lastStrict,
+                                        { 9: "OK!", length: 10 }).a);
+  assertEquals("OK!", Reflect.construct(lastSloppy,
+                                        { 9: "OK!", length: 10 }).a);
+  assertEquals("TEST", Reflect.construct(sumStrict,
+                                         ["T", "E", "S", "T"]).a);
+  assertEquals("TEST!!", Reflect.construct(sumStrict,
+                                           ["T", "E", "S", "T", "!", "!"]).a);
+  assertEquals(10, Reflect.construct(sumStrict,
+                                     { 0: 1, 1: 2, 2: 3, 3: 4, length: 4 }).a);
+  assertEquals("TEST", Reflect.construct(sumSloppy,
+                                         ["T", "E", "S", "T"]).a);
+  assertEquals("TEST!!", Reflect.construct(sumSloppy,
+                                           ["T", "E", "S", "T", "!", "!"]).a);
+  assertEquals(10, Reflect.construct(sumSloppy,
+                                     { 0: 1, 1: 2, 2: 3, 3: 4, length: 4 }).a);
+})();
+
+(function() {
+  function* f() { yield 1; yield 2; }
+  function* g() { yield 3; yield 4; }
+  assertThrows(()=>Reflect.construct(f, [], g));
+})();
+
+(function () {
+  var realm1 = Realm.create();
+  var realm2 = Realm.create();
+
+  var well_known_intrinsic_constructors = [
+      "Array",
+      "ArrayBuffer",
+      "Boolean",
+      ["DataView", [new ArrayBuffer()]],
+      "Date",
+      "Error",
+      "EvalError",
+      "Float32Array",
+      "Float64Array",
+      ["Function", ["return 153;"]],
+      ["Function", ["'use strict'; return 153;"]],
+      ["Function", ["'use strong'; return 153;"]],
+      ["((function*(){}).constructor)", ["yield 153;"]],  // GeneratorFunction
+      ["((function*(){}).constructor)", ["'use strict'; yield 153;"]],
+      ["((function*(){}).constructor)", ["'use strong'; yield 153;"]],
+      "Int8Array",
+      "Int16Array",
+      "Int32Array",
+      "Map",
+      "Number",
+      "Object",
+      ["Promise", [(resolve, reject)=>{}]],
+      "RangeError",
+      "ReferenceError",
+      "RegExp",
+      "Set",
+      "String",
+      "SyntaxError",
+      // %TypedArray%?
+      "TypeError",
+      "Uint8Array",
+      "Uint8ClampedArray",
+      "Uint16Array",
+      "Uint32Array",
+      "URIError",
+      "WeakMap",
+      "WeakSet"
+  ];
+
+  function getname(v) {
+    return typeof v === "string" ? v : v[0];
+  }
+
+  function getargs(v) {
+    return typeof v === "string" ? [] : v[1];
+  }
+
+  function test_intrinsic_prototype(name) {
+    var own = Realm.eval(realm1, name);
+
+    // Ensure that constructor.prototype is non-writable, non-configurable.
+    var desc = Object.getOwnPropertyDescriptor(own, "prototype");
+    assertFalse(desc.configurable, name);
+    assertFalse(desc.writable, name);
+  }
+
+  for (var intrinsic of well_known_intrinsic_constructors) {
+    test_intrinsic_prototype(getname(intrinsic));
+  }
+
+  function function_with_non_instance_prototype(realm) {
+    var f = Realm.eval(realm, "(function(){})");
+    f.prototype = 1;
+    return f;
+  }
+
+  function test_intrinsic_default(realm, name, args, convert) {
+    var own = Realm.eval(realm1, name);
+    var other = Realm.eval(realm, name);
+    var o = Reflect.construct(
+        convert(own), args, function_with_non_instance_prototype(realm));
+
+    // Ensure the intrisicDefaultProto is fetched from the correct realm.
+    assertTrue(realm == realm1 || o.__proto__ !== own.prototype, [...arguments]);
+    assertTrue(o.__proto__ === other.prototype, [...arguments]);
+  }
+
+  function test_all(test, convert) {
+    for (var intrinsic of well_known_intrinsic_constructors) {
+      for (var realm of [realm1, realm2]) {
+        test(realm, getname(intrinsic), getargs(intrinsic), convert);
+      }
+    }
+  }
+
+  test_all(test_intrinsic_default, (v)=>v);
+  test_all(test_intrinsic_default,
+           (v)=>{ "use strict"; return class extends v {}});
+})();