resizable-array-buffers-transferable.js

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// |jit-test| --enable-arraybuffer-resizable; skip-if: !ArrayBuffer.prototype.resize

const scopes = [

  "SameProcess",

  "DifferentProcess",

  "DifferentProcessForIndexedDB",

];

function testArrayBufferTransferable(scope) {

  var length = 4;

  var byteLength = length * Uint8Array.BYTES_PER_ELEMENT;

  var maxByteLength = 2 * byteLength;

  var ab = new ArrayBuffer(byteLength, {maxByteLength});

  assertEq(ab.resizable, true);

  assertEq(ab.byteLength, byteLength);

  assertEq(ab.maxByteLength, maxByteLength);

  var ta = new Uint8Array(ab);

  ta.set([33, 44, 55, 66]);

  assertEq(ta.toString(), "33,44,55,66");

  var clonebuf = serialize(ab, [ab], {scope});

  var ab2 = deserialize(clonebuf);

  assertEq(ab2 instanceof ArrayBuffer, true);

  assertEq(new Uint8Array(ab2).toString(), "33,44,55,66");

  assertEq(ab2.resizable, true);

  assertEq(ab2.byteLength, byteLength);

  assertEq(ab2.maxByteLength, maxByteLength);

  assertEq(ab.detached, true);

  assertEq(ab2.detached, false);

  ab2.resize(maxByteLength);

  assertEq(ab2.byteLength, maxByteLength);

scopes.forEach(testArrayBufferTransferable);