text: // Copyright 2013 the V8 project authors. All rights reserved.
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  //       copyright notice, this list of conditions and the following
  //       disclaimer in the documentation and/or other materials provided
  //       with the distribution.
  //     * Neither the name of Google Inc. nor the names of its
  //       contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  // Flags: --harmony-tostring
  
  // ArrayBuffer
  
  function TestByteLength(param, expectedByteLength) {
    var ab = new ArrayBuffer(param);
    assertSame(expectedByteLength, ab.byteLength);
  }
  
  function TestArrayBufferCreation() {
    TestByteLength(1, 1);
    TestByteLength(256, 256);
    TestByteLength(2.567, 2);
  
    TestByteLength("abc", 0);
  
    TestByteLength(0, 0);
  
    assertThrows(function() { new ArrayBuffer(-10); }, RangeError);
    assertThrows(function() { new ArrayBuffer(-2.567); }, RangeError);
  
  /* TODO[dslomov]: Reenable the test
    assertThrows(function() {
      var ab1 = new ArrayBuffer(0xFFFFFFFFFFFF)
    }, RangeError);
  */
  
    var ab = new ArrayBuffer();
    assertSame(0, ab.byteLength);
    assertEquals("[object ArrayBuffer]",
        Object.prototype.toString.call(ab));
  }
  
  TestArrayBufferCreation();
  
  function TestByteLengthNotWritable() {
    var ab = new ArrayBuffer(1024);
    assertSame(1024, ab.byteLength);
  
    assertThrows(function() { "use strict"; ab.byteLength = 42; }, TypeError);
  }
  
  TestByteLengthNotWritable();
  
  function TestSlice(expectedResultLen, initialLen, start, end) {
    var ab = new ArrayBuffer(initialLen);
    var a1 = new Uint8Array(ab);
    for (var i = 0; i < a1.length; i++) {
      a1[i] = 0xCA;
    }
    var slice = ab.slice(start, end);
    assertSame(expectedResultLen, slice.byteLength);
    var a2 = new Uint8Array(slice);
    for (var i = 0; i < a2.length; i++) {
      assertSame(0xCA, a2[i]);
    }
  }
  
  function TestArrayBufferSlice() {
    var ab = new ArrayBuffer(1024);
    var ab1 = ab.slice(512, 1024);
    assertSame(512, ab1.byteLength);
  
    TestSlice(512, 1024, 512, 1024);
    TestSlice(512, 1024, 512);
  
    TestSlice(0, 0, 1, 20);
    TestSlice(100, 100, 0, 100);
    TestSlice(100, 100, 0, 1000);
  
    TestSlice(0, 100, 5, 1);
  
    TestSlice(1, 100, -11, -10);
    TestSlice(9, 100, -10, 99);
    TestSlice(0, 100, -10, 80);
    TestSlice(10, 100, 80, -10);
  
    TestSlice(10, 100, 90, "100");
    TestSlice(10, 100, "90", "100");
  
    TestSlice(0,  100, 90, "abc");
    TestSlice(10, 100, "abc", 10);
  
    TestSlice(10, 100, 0.96, 10.96);
    TestSlice(10, 100, 0.96, 10.01);
    TestSlice(10, 100, 0.01, 10.01);
    TestSlice(10, 100, 0.01, 10.96);
  
    TestSlice(10, 100, 90);
    TestSlice(10, 100, -10);
  }
  
  TestArrayBufferSlice();
  
  // Typed arrays
  
  function TestTypedArray(constr, elementSize, typicalElement) {
    assertSame(elementSize, constr.BYTES_PER_ELEMENT);
  
    var ab = new ArrayBuffer(256*elementSize);
  
    var a0 = new constr(30);
    assertEquals("[object " + constr.name + "]",
        Object.prototype.toString.call(a0));
  
    assertTrue(ArrayBuffer.isView(a0));
    assertSame(elementSize, a0.BYTES_PER_ELEMENT);
    assertSame(30, a0.length);
    assertSame(30*elementSize, a0.byteLength);
    assertSame(0, a0.byteOffset);
    assertSame(30*elementSize, a0.buffer.byteLength);
  
    var aLen0 = new constr(0);
    assertSame(elementSize, aLen0.BYTES_PER_ELEMENT);
    assertSame(0, aLen0.length);
    assertSame(0, aLen0.byteLength);
    assertSame(0, aLen0.byteOffset);
    assertSame(0, aLen0.buffer.byteLength);
  
    var aOverBufferLen0 = new constr(ab, 128*elementSize, 0);
    assertSame(ab, aOverBufferLen0.buffer);
    assertSame(elementSize, aOverBufferLen0.BYTES_PER_ELEMENT);
    assertSame(0, aOverBufferLen0.length);
    assertSame(0, aOverBufferLen0.byteLength);
    assertSame(128*elementSize, aOverBufferLen0.byteOffset);
  
    var a1 = new constr(ab, 128*elementSize, 128);
    assertSame(ab, a1.buffer);
    assertSame(elementSize, a1.BYTES_PER_ELEMENT);
    assertSame(128, a1.length);
    assertSame(128*elementSize, a1.byteLength);
    assertSame(128*elementSize, a1.byteOffset);
  
  
    var a2 = new constr(ab, 64*elementSize, 128);
    assertSame(ab, a2.buffer);
    assertSame(elementSize, a2.BYTES_PER_ELEMENT);
    assertSame(128, a2.length);
    assertSame(128*elementSize, a2.byteLength);
    assertSame(64*elementSize, a2.byteOffset);
  
    var a3 = new constr(ab, 192*elementSize);
    assertSame(ab, a3.buffer);
    assertSame(64, a3.length);
    assertSame(64*elementSize, a3.byteLength);
    assertSame(192*elementSize, a3.byteOffset);
  
    var a4 = new constr(ab);
    assertSame(ab, a4.buffer);
    assertSame(256, a4.length);
    assertSame(256*elementSize, a4.byteLength);
    assertSame(0, a4.byteOffset);
  
  
    var i;
    for (i = 0; i < 128; i++) {
      a1[i] = typicalElement;
    }
  
    for (i = 0; i < 128; i++) {
      assertSame(typicalElement, a1[i]);
    }
  
    for (i = 0; i < 64; i++) {
      assertSame(0, a2[i]);
    }
  
    for (i = 64; i < 128; i++) {
      assertSame(typicalElement, a2[i]);
    }
  
    for (i = 0; i < 64; i++) {
      assertSame(typicalElement, a3[i]);
    }
  
    for (i = 0; i < 128; i++) {
      assertSame(0, a4[i]);
    }
  
    for (i = 128; i < 256; i++) {
      assertSame(typicalElement, a4[i]);
    }
  
    var aAtTheEnd = new constr(ab, 256*elementSize);
    assertSame(elementSize, aAtTheEnd.BYTES_PER_ELEMENT);
    assertSame(0, aAtTheEnd.length);
    assertSame(0, aAtTheEnd.byteLength);
    assertSame(256*elementSize, aAtTheEnd.byteOffset);
  
    assertThrows(function () { new constr(ab, 257*elementSize); }, RangeError);
    assertThrows(
        function () { new constr(ab, 128*elementSize, 192); },
        RangeError);
  
    if (elementSize !== 1) {
      assertThrows(function() { new constr(ab, 128*elementSize - 1, 10); },
                   RangeError);
      var unalignedArrayBuffer = new ArrayBuffer(10*elementSize + 1);
      var goodArray = new constr(unalignedArrayBuffer, 0, 10);
      assertSame(10, goodArray.length);
      assertSame(10*elementSize, goodArray.byteLength);
      assertThrows(function() { new constr(unalignedArrayBuffer)}, RangeError);
      assertThrows(function() { new constr(unalignedArrayBuffer, 5*elementSize)},
                   RangeError);
    }
  
    var aFromString = new constr("30");
    assertSame(elementSize, aFromString.BYTES_PER_ELEMENT);
    assertSame(30, aFromString.length);
    assertSame(30*elementSize, aFromString.byteLength);
    assertSame(0, aFromString.byteOffset);
    assertSame(30*elementSize, aFromString.buffer.byteLength);
  
    var jsArray = [];
    for (i = 0; i < 30; i++) {
      jsArray.push(typicalElement);
    }
    var aFromArray = new constr(jsArray);
    assertSame(elementSize, aFromArray.BYTES_PER_ELEMENT);
    assertSame(30, aFromArray.length);
    assertSame(30*elementSize, aFromArray.byteLength);
    assertSame(0, aFromArray.byteOffset);
    assertSame(30*elementSize, aFromArray.buffer.byteLength);
    for (i = 0; i < 30; i++) {
      assertSame(typicalElement, aFromArray[i]);
    }
  
    var abLen0 = new ArrayBuffer(0);
    var aOverAbLen0 = new constr(abLen0);
    assertSame(abLen0, aOverAbLen0.buffer);
    assertSame(elementSize, aOverAbLen0.BYTES_PER_ELEMENT);
    assertSame(0, aOverAbLen0.length);
    assertSame(0, aOverAbLen0.byteLength);
    assertSame(0, aOverAbLen0.byteOffset);
  
    var aNoParam = new constr();
    assertSame(elementSize, aNoParam.BYTES_PER_ELEMENT);
    assertSame(0, aNoParam.length);
    assertSame(0, aNoParam.byteLength);
    assertSame(0, aNoParam.byteOffset);
  
    var a = new constr(ab, 64*elementSize, 128);
    assertEquals("[object " + constr.name + "]",
        Object.prototype.toString.call(a));
    var desc = Object.getOwnPropertyDescriptor(
        constr.prototype.__proto__, Symbol.toStringTag);
    assertTrue(desc.configurable);
    assertFalse(desc.enumerable);
    assertFalse(!!desc.writable);
    assertFalse(!!desc.set);
    assertEquals("function", typeof desc.get);
  
    // Test that the constructor can be called with an iterable
    function* gen() { for (var i = 0; i < 10; i++) yield i; }
    var genArr = new constr(gen());
    assertEquals(10, genArr.length);
    assertEquals(0, genArr[0]);
    assertEquals(9, genArr[9]);
    // Arrays can be converted to TypedArrays
    genArr = new constr([1, 2, 3]);
    assertEquals(3, genArr.length);
    assertEquals(1, genArr[0]);
    assertEquals(3, genArr[2]);
    // Redefining Array.prototype[Symbol.iterator] still works
    var arrayIterator = Array.prototype[Symbol.iterator];
    Array.prototype[Symbol.iterator] = gen;
    genArr = new constr([1, 2, 3]);
    assertEquals(10, genArr.length);
    assertEquals(0, genArr[0]);
    assertEquals(9, genArr[9]);
    Array.prototype[Symbol.iterator] = arrayIterator;
    // Other array-like things can be made into a TypedArray
    var myObject = { 0: 5, 1: 6, length: 2 };
    genArr = new constr(myObject);
    assertEquals(2, genArr.length);
    assertEquals(5, genArr[0]);
    assertEquals(6, genArr[1]);
    // Iterator takes precedence over array-like, and the property
    // is read only once.
    var iteratorReadCount = 0;
    Object.defineProperty(myObject, Symbol.iterator, {
      get: function() { iteratorReadCount++; return gen; }
    });
    genArr = new constr(myObject);
    assertEquals(10, genArr.length);
    assertEquals(0, genArr[0]);
    assertEquals(9, genArr[9]);
    assertEquals(1, iteratorReadCount);
  }
  
  TestTypedArray(Uint8Array, 1, 0xFF);
  TestTypedArray(Int8Array, 1, -0x7F);
  TestTypedArray(Uint16Array, 2, 0xFFFF);
  TestTypedArray(Int16Array, 2, -0x7FFF);
  TestTypedArray(Uint32Array, 4, 0xFFFFFFFF);
  TestTypedArray(Int32Array, 4, -0x7FFFFFFF);
  TestTypedArray(Float32Array, 4, 0.5);
  TestTypedArray(Float64Array, 8, 0.5);
  TestTypedArray(Uint8ClampedArray, 1, 0xFF);
  
  function SubarrayTestCase(constructor, item, expectedResultLen, expectedStartIndex,
                            initialLen, start, end) {
    var a = new constructor(initialLen);
    var s = a.subarray(start, end);
    assertSame(constructor, s.constructor);
    assertSame(expectedResultLen, s.length);
    if (s.length > 0) {
      s[0] = item;
      assertSame(item, a[expectedStartIndex]);
    }
  }
  
  function TestSubArray(constructor, item) {
    SubarrayTestCase(constructor, item, 512, 512, 1024, 512, 1024);
    SubarrayTestCase(constructor, item, 512, 512, 1024, 512);
  
    SubarrayTestCase(constructor, item, 0, undefined, 0, 1, 20);
    SubarrayTestCase(constructor, item, 100, 0,       100, 0, 100);
    SubarrayTestCase(constructor, item, 100, 0,       100,  0, 1000);
    SubarrayTestCase(constructor, item, 0, undefined, 100, 5, 1);
  
    SubarrayTestCase(constructor, item, 1, 89,        100, -11, -10);
    SubarrayTestCase(constructor, item, 9, 90,        100, -10, 99);
    SubarrayTestCase(constructor, item, 0, undefined, 100, -10, 80);
    SubarrayTestCase(constructor, item, 10,80,        100, 80, -10);
  
    SubarrayTestCase(constructor, item, 10,90,        100, 90, "100");
    SubarrayTestCase(constructor, item, 10,90,        100, "90", "100");
  
    SubarrayTestCase(constructor, item, 0, undefined, 100, 90, "abc");
    SubarrayTestCase(constructor, item, 10,0,         100, "abc", 10);
  
    SubarrayTestCase(constructor, item, 10,0,         100, 0.96, 10.96);
    SubarrayTestCase(constructor, item, 10,0,         100, 0.96, 10.01);
    SubarrayTestCase(constructor, item, 10,0,         100, 0.01, 10.01);
    SubarrayTestCase(constructor, item, 10,0,         100, 0.01, 10.96);
  
  
    SubarrayTestCase(constructor, item, 10,90,        100, 90);
    SubarrayTestCase(constructor, item, 10,90,        100, -10);
  
    var method = constructor.prototype.subarray;
    method.call(new constructor(100), 0, 100);
    var o = {};
    assertThrows(function() { method.call(o, 0, 100); }, TypeError);
  }
  
  TestSubArray(Uint8Array, 0xFF);
  TestSubArray(Int8Array, -0x7F);
  TestSubArray(Uint16Array, 0xFFFF);
  TestSubArray(Int16Array, -0x7FFF);
  TestSubArray(Uint32Array, 0xFFFFFFFF);
  TestSubArray(Int32Array, -0x7FFFFFFF);
  TestSubArray(Float32Array, 0.5);
  TestSubArray(Float64Array, 0.5);
  TestSubArray(Uint8ClampedArray, 0xFF);
  
  function TestTypedArrayOutOfRange(constructor, value, result) {
    var a = new constructor(1);
    a[0] = value;
    assertSame(result, a[0]);
  }
  
  TestTypedArrayOutOfRange(Uint8Array, 0x1FA, 0xFA);
  TestTypedArrayOutOfRange(Uint8Array, -1, 0xFF);
  
  TestTypedArrayOutOfRange(Int8Array, 0x1FA, 0x7A - 0x80);
  
  TestTypedArrayOutOfRange(Uint16Array, 0x1FFFA, 0xFFFA);
  TestTypedArrayOutOfRange(Uint16Array, -1, 0xFFFF);
  TestTypedArrayOutOfRange(Int16Array, 0x1FFFA, 0x7FFA - 0x8000);
  
  TestTypedArrayOutOfRange(Uint32Array, 0x1FFFFFFFA, 0xFFFFFFFA);
  TestTypedArrayOutOfRange(Uint32Array, -1, 0xFFFFFFFF);
  TestTypedArrayOutOfRange(Int32Array, 0x1FFFFFFFA, 0x7FFFFFFA - 0x80000000);
  
  TestTypedArrayOutOfRange(Uint8ClampedArray, 0x1FA, 0xFF);
  TestTypedArrayOutOfRange(Uint8ClampedArray, -1, 0);
  
  var typedArrayConstructors = [
    Uint8Array,
    Int8Array,
    Uint16Array,
    Int16Array,
    Uint32Array,
    Int32Array,
    Uint8ClampedArray,
    Float32Array,
    Float64Array];
  
  function TestPropertyTypeChecks(constructor) {
    function CheckProperty(name) {
      assertThrows(function() { 'use strict'; new constructor(10)[name] = 0; })
      var d = Object.getOwnPropertyDescriptor(constructor.prototype.__proto__, name);
      var o = {};
      assertThrows(function() {d.get.call(o);}, TypeError);
      for (var i = 0; i < typedArrayConstructors.length; i++) {
        var ctor = typedArrayConstructors[i];
        var a = new ctor(10);
        d.get.call(a); // shouldn't throw
      }
    }
  
    CheckProperty("buffer");
    CheckProperty("byteOffset");
    CheckProperty("byteLength");
    CheckProperty("length");
  }
  
  for(i = 0; i < typedArrayConstructors.length; i++) {
    TestPropertyTypeChecks(typedArrayConstructors[i]);
  }
  
  
  function TestTypedArraySet() {
    // Test array.set in different combinations.
  
    function assertArrayPrefix(expected, array) {
      for (var i = 0; i < expected.length; ++i) {
        assertEquals(expected[i], array[i]);
      }
    }
  
    var a11 = new Int16Array([1, 2, 3, 4, 0, -1])
    var a12 = new Uint16Array(15)
    a12.set(a11, 3)
    assertArrayPrefix([0, 0, 0, 1, 2, 3, 4, 0, 0xffff, 0, 0], a12)
    assertThrows(function(){ a11.set(a12) })
  
    var a21 = [1, undefined, 10, NaN, 0, -1, {valueOf: function() {return 3}}]
    var a22 = new Int32Array(12)
    a22.set(a21, 2)
    assertArrayPrefix([0, 0, 1, 0, 10, 0, 0, -1, 3, 0], a22)
  
    var a31 = new Float32Array([2, 4, 6, 8, 11, NaN, 1/0, -3])
    var a32 = a31.subarray(2, 6)
    a31.set(a32, 4)
    assertArrayPrefix([2, 4, 6, 8, 6, 8, 11, NaN], a31)
    assertArrayPrefix([6, 8, 6, 8], a32)
  
    var a4 = new Uint8ClampedArray([3,2,5,6])
    a4.set(a4)
    assertArrayPrefix([3, 2, 5, 6], a4)
  
    // Cases with overlapping backing store but different element sizes.
    var b = new ArrayBuffer(4)
    var a5 = new Int16Array(b)
    var a50 = new Int8Array(b)
    var a51 = new Int8Array(b, 0, 2)
    var a52 = new Int8Array(b, 1, 2)
    var a53 = new Int8Array(b, 2, 2)
  
    a5.set([0x5050, 0x0a0a])
    assertArrayPrefix([0x50, 0x50, 0x0a, 0x0a], a50)
    assertArrayPrefix([0x50, 0x50], a51)
    assertArrayPrefix([0x50, 0x0a], a52)
    assertArrayPrefix([0x0a, 0x0a], a53)
  
    a50.set([0x50, 0x50, 0x0a, 0x0a])
    a51.set(a5)
    assertArrayPrefix([0x50, 0x0a, 0x0a, 0x0a], a50)
  
    a50.set([0x50, 0x50, 0x0a, 0x0a])
    a52.set(a5)
    assertArrayPrefix([0x50, 0x50, 0x0a, 0x0a], a50)
  
    a50.set([0x50, 0x50, 0x0a, 0x0a])
    a53.set(a5)
    assertArrayPrefix([0x50, 0x50, 0x50, 0x0a], a50)
  
    a50.set([0x50, 0x51, 0x0a, 0x0b])
    a5.set(a51)
    assertArrayPrefix([0x0050, 0x0051], a5)
  
    a50.set([0x50, 0x51, 0x0a, 0x0b])
    a5.set(a52)
    assertArrayPrefix([0x0051, 0x000a], a5)
  
    a50.set([0x50, 0x51, 0x0a, 0x0b])
    a5.set(a53)
    assertArrayPrefix([0x000a, 0x000b], a5)
  
    // Mixed types of same size.
    var a61 = new Float32Array([1.2, 12.3])
    var a62 = new Int32Array(2)
    a62.set(a61)
    assertArrayPrefix([1, 12], a62)
    a61.set(a62)
    assertArrayPrefix([1, 12], a61)
  
    // Invalid source
    var a = new Uint16Array(50);
    var expected = [];
    for (i = 0; i < 50; i++) {
      a[i] = i;
      expected.push(i);
    }
    a.set({});
    assertArrayPrefix(expected, a);
    assertThrows(function() { a.set.call({}) }, TypeError);
    assertThrows(function() { a.set.call([]) }, TypeError);
  
    assertThrows(function() { a.set(0); }, TypeError);
    assertThrows(function() { a.set(0, 1); }, TypeError);
  }
  
  TestTypedArraySet();
  
  function TestTypedArraysWithIllegalIndices() {
    var a = new Int32Array(100);
  
    a[-10] = 10;
    assertEquals(undefined, a[-10]);
    a["-10"] = 10;
    assertEquals(undefined, a["-10"]);
  
    var s = "    -10";
    a[s] = 10;
    assertEquals(10, a[s]);
    var s1 = "    -10   ";
    a[s] = 10;
    assertEquals(10, a[s]);
  
    a["-1e2"] = 10;
    assertEquals(10, a["-1e2"]);
    assertEquals(undefined, a[-1e2]);
  
    a["-0"] = 256;
    var s2 = "     -0";
    a[s2] = 255;
    assertEquals(undefined, a["-0"]);
    assertEquals(255, a[s2]);
    assertEquals(0, a[-0]);
  
    a[-Infinity] = 50;
    assertEquals(undefined, a[-Infinity]);
  
    a[1.5] = 10;
    assertEquals(undefined, a[1.5]);
    var nan = Math.sqrt(-1);
    a[nan] = 5;
    assertEquals(undefined, a[nan]);
  
    var x = 0;
    var y = -0;
    assertEquals(Infinity, 1/x);
    assertEquals(-Infinity, 1/y);
    a[x] = 5;
    a[y] = 27;
    assertEquals(27, a[x]);
    assertEquals(27, a[y]);
  }
  
  TestTypedArraysWithIllegalIndices();
  
  function TestTypedArraysWithIllegalIndicesStrict() {
    'use strict';
    var a = new Int32Array(100);
  
    a[-10] = 10;
    assertEquals(undefined, a[-10]);
    a["-10"] = 10;
    assertEquals(undefined, a["-10"]);
  
    var s = "    -10";
    a[s] = 10;
    assertEquals(10, a[s]);
    var s1 = "    -10   ";
    a[s] = 10;
    assertEquals(10, a[s]);
  
    a["-1e2"] = 10;
    assertEquals(10, a["-1e2"]);
    assertEquals(undefined, a[-1e2]);
  
    a["-0"] = 256;
    var s2 = "     -0";
    a[s2] = 255;
    assertEquals(undefined, a["-0"]);
    assertEquals(255, a[s2]);
    assertEquals(0, a[-0]);
  
    /* Chromium bug: 424619
     * a[-Infinity] = 50;
     * assertEquals(undefined, a[-Infinity]);
     */
    a[1.5] = 10;
    assertEquals(undefined, a[1.5]);
    var nan = Math.sqrt(-1);
    a[nan] = 5;
    assertEquals(undefined, a[nan]);
  
    var x = 0;
    var y = -0;
    assertEquals(Infinity, 1/x);
    assertEquals(-Infinity, 1/y);
    a[x] = 5;
    a[y] = 27;
    assertEquals(27, a[x]);
    assertEquals(27, a[y]);
  }
  
  TestTypedArraysWithIllegalIndicesStrict();
  
  // DataView
  function TestDataViewConstructor() {
    var ab = new ArrayBuffer(256);
  
    var d1 = new DataView(ab, 1, 255);
    assertTrue(ArrayBuffer.isView(d1));
    assertSame(ab, d1.buffer);
    assertSame(1, d1.byteOffset);
    assertSame(255, d1.byteLength);
  
    var d2 = new DataView(ab, 2);
    assertSame(ab, d2.buffer);
    assertSame(2, d2.byteOffset);
    assertSame(254, d2.byteLength);
  
    var d3 = new DataView(ab);
    assertSame(ab, d3.buffer);
    assertSame(0, d3.byteOffset);
    assertSame(256, d3.byteLength);
  
    var d3a = new DataView(ab, 1, 0);
    assertSame(ab, d3a.buffer);
    assertSame(1, d3a.byteOffset);
    assertSame(0, d3a.byteLength);
  
    var d3b = new DataView(ab, 256, 0);
    assertSame(ab, d3b.buffer);
    assertSame(256, d3b.byteOffset);
    assertSame(0, d3b.byteLength);
  
    var d3c = new DataView(ab, 256);
    assertSame(ab, d3c.buffer);
    assertSame(256, d3c.byteOffset);
    assertSame(0, d3c.byteLength);
  
    var d4 = new DataView(ab, 1, 3.1415926);
    assertSame(ab, d4.buffer);
    assertSame(1, d4.byteOffset);
    assertSame(3, d4.byteLength);
  
  
    // error cases
    assertThrows(function() { new DataView(ab, -1); }, RangeError);
    assertThrows(function() { new DataView(ab, 1, -1); }, RangeError);
    assertThrows(function() { new DataView(); }, TypeError);
    assertThrows(function() { new DataView([]); }, TypeError);
    assertThrows(function() { new DataView(ab, 257); }, RangeError);
    assertThrows(function() { new DataView(ab, 1, 1024); }, RangeError);
  }
  
  TestDataViewConstructor();
  
  function TestDataViewPropertyTypeChecks() {
    var a = new DataView(new ArrayBuffer(10));
    function CheckProperty(name) {
      var d = Object.getOwnPropertyDescriptor(DataView.prototype, name);
      var o = {}
      assertThrows(function() {d.get.call(o);}, TypeError);
      d.get.call(a); // shouldn't throw
    }
  
    CheckProperty("buffer");
    CheckProperty("byteOffset");
    CheckProperty("byteLength");
  }
  
  
  TestDataViewPropertyTypeChecks();
  
  
  function TestDataViewToStringTag() {
    var a = new DataView(new ArrayBuffer(10));
    assertEquals("[object DataView]", Object.prototype.toString.call(a));
    var desc = Object.getOwnPropertyDescriptor(
        DataView.prototype, Symbol.toStringTag);
    assertTrue(desc.configurable);
    assertFalse(desc.enumerable);
    assertFalse(desc.writable);
    assertEquals("DataView", desc.value);
  }
  
  
  // General tests for properties
  
  // Test property attribute [[Enumerable]]
  function TestEnumerable(func, obj) {
    function props(x) {
      var array = [];
      for (var p in x) array.push(p);
      return array.sort();
    }
    assertArrayEquals([], props(func));
    assertArrayEquals([], props(func.prototype));
    if (obj)
      assertArrayEquals([], props(obj));
  }
  TestEnumerable(ArrayBuffer, new ArrayBuffer());
  for(i = 0; i < typedArrayConstructors.length; i++) {
    TestEnumerable(typedArrayConstructors[i]);
  }
  TestEnumerable(DataView, new DataView(new ArrayBuffer()));
  
  // Test arbitrary properties on ArrayBuffer
  function TestArbitrary(m) {
    function TestProperty(map, property, value) {
      map[property] = value;
      assertEquals(value, map[property]);
    }
    for (var i = 0; i < 20; i++) {
      TestProperty(m, 'key' + i, 'val' + i);
      TestProperty(m, 'foo' + i, 'bar' + i);
    }
  }
  TestArbitrary(new ArrayBuffer(256));
  for(i = 0; i < typedArrayConstructors.length; i++) {
    TestArbitrary(new typedArrayConstructors[i](10));
  }
  TestArbitrary(new DataView(new ArrayBuffer(256)));
  
  
  // Test direct constructor call
  assertThrows(function() { ArrayBuffer(); }, TypeError);
  assertThrows(function() { DataView(new ArrayBuffer()); }, TypeError);
  
  function TestNonConfigurableProperties(constructor) {
    var arr = new constructor([100])
    assertFalse(Object.getOwnPropertyDescriptor(arr,"0").configurable)
    assertFalse(delete arr[0])
  }
  
  for(i = 0; i < typedArrayConstructors.length; i++) {
    TestNonConfigurableProperties(typedArrayConstructors[i]);
  }
  