Include Harmony Array/TypedArray methods unconditionally

test/mjsunit/harmony/typedarray-from.js

-// Copyright 2015 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-arrays
-
-var typedArrayConstructors = [
-  Uint8Array,
-  Int8Array,
-  Uint16Array,
-  Int16Array,
-  Uint32Array,
-  Int32Array,
-  Uint8ClampedArray,
-  Float32Array,
-  Float64Array
-];
-
-for (var constructor of typedArrayConstructors) {
-  assertEquals(1, constructor.from.length);
-
-  // TypedArray.from only callable on this subclassing %TypedArray%
-  assertThrows(function () {constructor.from.call(Array, [])}, TypeError);
-
-  function assertArrayLikeEquals(value, expected, type) {
-    assertEquals(value.__proto__, type.prototype);
-    assertEquals(expected.length, value.length);
-    for (var i = 0; i < value.length; ++i) {
-      assertEquals(expected[i], value[i]);
-    }
-  }
-
-  // Assert that calling mapfn with / without thisArg in sloppy and strict modes
-  // works as expected.
-  var global = this;
-  function non_strict() { assertEquals(global, this); }
-  function strict() { 'use strict'; assertEquals(undefined, this); }
-  function strict_null() { 'use strict'; assertEquals(null, this); }
-  constructor.from([1], non_strict);
-  constructor.from([1], non_strict, void 0);
-  constructor.from([1], non_strict, null);
-  constructor.from([1], strict);
-  constructor.from([1], strict, void 0);
-  constructor.from([1], strict_null, null);
-
-  // TypedArray.from can only be called on TypedArray constructors
-  assertThrows(function() {constructor.from.call({}, [])}, TypeError);
-  assertThrows(function() {constructor.from.call([], [])}, TypeError);
-  assertThrows(function() {constructor.from.call(1, [])}, TypeError);
-  assertThrows(function() {constructor.from.call(undefined, [])}, TypeError);
-
-  // Converting from various other types, demonstrating that it can
-  // operate on array-like objects as well as iterables.
-  // TODO(littledan): constructors should have similar flexibility.
-  assertArrayLikeEquals(constructor.from(
-      { length: 1, 0: 5 }), [5], constructor);
-
-  assertArrayLikeEquals(constructor.from(
-      { length: -1, 0: 5 }), [], constructor);
-
-  assertArrayLikeEquals(constructor.from(
-      [1, 2, 3]), [1, 2, 3], constructor);
-
-  var set = new Set([1, 2, 3]);
-  assertArrayLikeEquals(constructor.from(set), [1, 2, 3],
-        constructor);
-
-  function* generator() {
-    yield 4;
-    yield 5;
-    yield 6;
-  }
-
-  assertArrayLikeEquals(constructor.from(generator()),
-                        [4, 5, 6], constructor);
-
-  assertThrows(function() { constructor.from(null); }, TypeError);
-  assertThrows(function() { constructor.from(undefined); }, TypeError);
-  assertThrows(function() { constructor.from([], null); }, TypeError);
-  assertThrows(function() { constructor.from([], 'noncallable'); },
-               TypeError);
-
-  var nullIterator = {};
-  nullIterator[Symbol.iterator] = null;
-  assertArrayLikeEquals(constructor.from(nullIterator), [],
-                        constructor);
-
-  var nonObjIterator = {};
-  nonObjIterator[Symbol.iterator] = function() { return 'nonObject'; };
-  assertThrows(function() { constructor.from(nonObjIterator); },
-               TypeError);
-
-  assertThrows(function() { constructor.from([], null); }, TypeError);
-
-  // Ensure iterator is only accessed once, and only invoked once
-  var called = 0;
-  var arr = [1, 2, 3];
-  var obj = {};
-  var counter = 0;
-
-  // Test order --- only get iterator method once
-  function testIterator() {
-    called++;
-    assertEquals(obj, this);
-    return arr[Symbol.iterator]();
-  }
-  var getCalled = 0;
-  Object.defineProperty(obj, Symbol.iterator, {
-    get: function() {
-      getCalled++;
-      return testIterator;
-    },
-    set: function() {
-      assertUnreachable('@@iterator should not be set');
-    }
-  });
-  assertArrayLikeEquals(constructor.from(obj), [1, 2, 3], constructor);
-  assertEquals(getCalled, 1);
-  assertEquals(called, 1);
-
-  assertEquals(constructor, Uint8Array.from.call(constructor, [1]).constructor);
-  assertEquals(Uint8Array, constructor.from.call(Uint8Array, [1]).constructor);
-}