species-fuse-typedarray-2.js

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// Test for typed array species fuse with multiple realms.

function testProto() {

  const TypedArray = Object.getPrototypeOf(Int8Array);

  var g = newGlobal();

  var arr = g.evaluate(`

    var TypedArray = Object.getPrototypeOf(Int8Array);

    new Int8Array(4);

`);

  var count = 0;

  Object.defineProperty(g.TypedArray.prototype, "constructor", {get: function() {

    count++;

    return Int8Array;

  }});

  delete g.Int8Array.prototype.constructor;

  for (var i = 0; i < 20; i++) {

    assertEq(TypedArray.prototype.slice.call(arr).length, 4);

  assertEq(count, 20);

  assertEq(getFuseState().OptimizeTypedArraySpeciesFuse.intact, true);

  assertEq(g.getFuseState().OptimizeTypedArraySpeciesFuse.intact, false);

testProto();

var TypedArrays = [

  Int8Array,

  Uint8Array,

  Uint8ClampedArray,

  Int16Array,

  Uint16Array,

  Int32Array,

  Uint32Array,

  BigInt64Array,

  BigUint64Array,

  Float16Array,

  Float32Array,

  Float64Array,

];

function testConcrete(TA) {

  var g = newGlobal();

  var arr = g.evaluate(`new ${TA.name}(4);`);

  var count = 0;

  Object.defineProperty(g[TA.name].prototype, "constructor", {get: function() {

    count++;

    return TA;

  }});

  for (var i = 0; i < 20; i++) {

    assertEq(TA.prototype.slice.call(arr).length, 4);

  assertEq(count, 20);

  assertEq(getFuseState().OptimizeTypedArraySpeciesFuse.intact, true);

  assertEq(g.getFuseState().OptimizeTypedArraySpeciesFuse.intact, false);

for (var TA of TypedArrays) {

  testConcrete(TA);