tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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good-views.js (2001B)

      1 // |reftest| skip-if(!this.hasOwnProperty('Atomics')||!this.hasOwnProperty('SharedArrayBuffer')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))) -- Atomics,SharedArrayBuffer is not enabled unconditionally, ARM64 Simulator cannot emulate atomics
      2 // Copyright (C) 2017 Mozilla Corporation.  All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 
      5 /*---
      6 esid: sec-atomics.store
      7 description: Test Atomics.store on arrays that allow atomic operations.
      8 includes: [testAtomics.js, testTypedArray.js]
      9 features: [ArrayBuffer, Atomics, DataView, SharedArrayBuffer, Symbol, TypedArray]
     10 ---*/
     11 
     12 const sab = new SharedArrayBuffer(1024);
     13 const ab = new ArrayBuffer(16);
     14 const views = nonClampedIntArrayConstructors.slice();
     15 
     16 testWithTypedArrayConstructors(function(TA) {
     17  // Make it interesting - use non-zero byteOffsets and non-zero indexes.
     18 
     19  const view = new TA(sab, 32, 20);
     20  const control = new TA(ab, 0, 2);
     21 
     22  const values = [
     23    10,
     24    -5,
     25    12345,
     26    123456789,
     27    Math.PI,
     28    "33",
     29    {
     30      valueOf: function() { return 33; }
     31    },
     32    undefined
     33  ];
     34 
     35  for (let i = 0; i < values.length; i++) {
     36    let val = values[i];
     37    assert.sameValue(Atomics.store(view, 3, val), ToInteger(val),
     38      'Atomics.store(view, 3, val) returns ToInteger(val)');
     39 
     40    control[0] = val;
     41    assert.sameValue(
     42      view[3],
     43      control[0],
     44      'The value of view[3] equals the value of `control[0]` (val)'
     45    );
     46  }
     47 
     48  // In-bounds boundary cases for indexing
     49  testWithAtomicsInBoundsIndices(function(IdxGen) {
     50    let Idx = IdxGen(view);
     51    view.fill(0);
     52    Atomics.store(view, Idx, 37);
     53    assert.sameValue(Atomics.load(view, Idx), 37, 'Atomics.load(view, Idx) returns 37');
     54  });
     55 }, views);
     56 
     57 function ToInteger(v) {
     58  v = +v;
     59  if (isNaN(v)) {
     60    return 0;
     61  }
     62  if (v == 0 || !isFinite(v)) {
     63    return v;
     64  }
     65  if (v < 0) {
     66    return -Math.floor(Math.abs(v));
     67  }
     68  return Math.floor(v);
     69 }
     70 
     71 reportCompare(0, 0);