typedarray-fill.js 5.16 KB
Newer Older
1 2 3 4
// 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.

5 6
// Flags: --allow-natives-syntax

7
var intArrayConstructors = [
8 9 10 11 12 13
  Uint8Array,
  Int8Array,
  Uint16Array,
  Int16Array,
  Uint32Array,
  Int32Array,
14 15 16 17
  Uint8ClampedArray
];

var floatArrayConstructors = [
18
  Float32Array,
19 20 21 22
  Float64Array
];

var typedArrayConstructors = [...intArrayConstructors, ...floatArrayConstructors];
23 24 25 26

for (var constructor of typedArrayConstructors) {
  assertEquals(1, constructor.prototype.fill.length);

27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
  assertArrayEquals([], new constructor([]).fill(8));
  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8));
  assertArrayEquals([0, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, 1));
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 10));
  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, -5));
  assertArrayEquals([0, 8, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 1, 4));
  assertArrayEquals([0, 8, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 1, -1));
  assertArrayEquals([0, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, 1, 42));
  assertArrayEquals([0, 0, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, -3, 42));
  assertArrayEquals([0, 0, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, -3, 4));
  assertArrayEquals([0, 0, 0, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, -2, -1));
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, -1, -3));
  assertArrayEquals([8, 8, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 0, 4));

  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, Infinity));
  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, -Infinity));
  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, 0, Infinity));
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 0, -Infinity));
45 46 47 48 49

  // Test exceptions
  assertThrows('constructor.prototype.fill.call(null)', TypeError);
  assertThrows('constructor.prototype.fill.call(undefined)', TypeError);
  assertThrows('constructor.prototype.fill.call([])', TypeError);
50

51 52 53 54 55
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(false));
  assertArrayEquals([1, 1, 1, 1, 1], new constructor([0, 0, 0, 0, 0]).fill(true));
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(null));
  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill("8"));

56
  // Test ToNumber
57 58 59 60 61
  var n = 1;
  assertArrayEquals([1, 1], new constructor(2).fill({ valueOf() { return n++; } }));
  assertEquals(2, n);
  var s = [];
  var p = new Proxy({}, { get(t,k) { s.push(k.toString()); return Reflect.get(t,k)} });
62
  new constructor(3).fill(p);
63
  assertEquals(["Symbol(Symbol.toPrimitive)", "valueOf", "toString", "Symbol(Symbol.toStringTag)"], s);
64

65 66 67 68
  // Shadowing length doesn't affect fill, unlike Array.prototype.fill
  var a = new constructor([2, 2]);
  Object.defineProperty(a, 'length', {value: 1});
  a.fill(3);
69
  assertArrayEquals([3, 3], [a[0], a[1]]);
70
  Array.prototype.fill.call(a, 4);
71
  assertArrayEquals([4, 3], [a[0], a[1]]);
72 73 74 75 76 77 78 79 80 81 82 83

  // Detached Operation
  var tmp = {
    [Symbol.toPrimitive]() {
      assertUnreachable("Parameter should not be processed when " +
                        "array.[[ViewedArrayBuffer]] is neutered.");
      return 0;
    }
  };
  var array = new constructor([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
  %ArrayBufferNeuter(array.buffer);
  assertThrows(() => array.fill(tmp), TypeError);
84
}
85

86 87 88 89 90 91 92 93 94 95 96
for (var constructor of intArrayConstructors) {
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(undefined));
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill());
  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill("abcd"));
}

for (var constructor of floatArrayConstructors) {
  assertArrayEquals([NaN, NaN, NaN, NaN, NaN], new constructor([0, 0, 0, 0, 0]).fill(undefined));
  assertArrayEquals([NaN, NaN, NaN, NaN, NaN], new constructor([0, 0, 0, 0, 0]).fill());
  assertArrayEquals([NaN, NaN, NaN, NaN, NaN], new constructor([0, 0, 0, 0, 0]).fill("abcd"));
}
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111

// Clamping
assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(-10));
assertArrayEquals([255, 255, 255, 255, 255], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(1000));

assertArrayEquals([1, 1, 1, 1, 1], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(0.50001));
assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(0.50000));
assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(0.49999));
// Check round half to even
assertArrayEquals([2, 2, 2, 2, 2], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(1.50000));
assertArrayEquals([2, 2, 2, 2, 2], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(2.50000));
assertArrayEquals([3, 3, 3, 3, 3], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(2.50001));
// Check infinity clamping.
assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(-Infinity));
assertArrayEquals([255, 255, 255, 255, 255], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(Infinity));