to-resizable-buffer.any.js

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This test has a WPT meta file that expects 5 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /wasm/jsapi/memory/to-resizable-buffer.any.js - WPT Dashboard Interop Dashboard
- /wasm/jsapi/memory/to-resizable-buffer.any.html - WPT Dashboard Interop Dashboard
- /wasm/jsapi/memory/to-resizable-buffer.any.worker.html - WPT Dashboard Interop Dashboard

// META: global=window,dedicatedworker,jsshell

// META: script=/wasm/jsapi/wasm-module-builder.js

test(() => {

  const thisValues = [

    undefined,

    null,

    true,

"",

    Symbol(),

1,

{},

    WebAssembly.Memory,

    WebAssembly.Memory.prototype,

];

  const desc = Object.getOwnPropertyDescriptor(WebAssembly.Memory.prototype, "toResizableBuffer");

  assert_equals(typeof desc, "object");

  const fun = desc.value;

  assert_equals(typeof desc.value, "function");

  for (const thisValue of thisValues) {

    assert_throws_js(TypeError, () => fun.call(thisValue), `this=${format_value(thisValue)}`);

}, "API surface");

test(() => {

  const memory = new WebAssembly.Memory({ initial: 0 });

  const buffer1 = memory.buffer;

  assert_false(buffer1.resizable, "By default the AB is initially not resizable");

  const buffer2 = memory.toResizableBuffer();

  assert_true(buffer2.resizable);

  assert_not_equals(buffer1, buffer2, "Changing resizability makes a new object");

  assert_true(buffer1.detached);

  assert_equals(memory.buffer, buffer2, "The buffer created by the most recent toFooBuffer call is cached");

  const buffer3 = memory.toResizableBuffer();

  assert_equals(buffer2, buffer3, "toResizableBuffer does nothing if buffer is already resizable")

  assert_equals(memory.buffer, buffer3);

}, "toResizableBuffer caching behavior");

test(() => {

    const maxNumPages = 4;

    const memory = new WebAssembly.Memory({ initial: 0, maximum: maxNumPages });

    const buffer = memory.toResizableBuffer();

    assert_equals(buffer.maxByteLength, kPageSize * maxNumPages, "Memory maximum is same as maxByteLength");

    const memory = new WebAssembly.Memory({ initial: 0 });

    const buffer = memory.toResizableBuffer();

    assert_equals(buffer.maxByteLength, kPageSize * kSpecMaxPages, "Default max size is 65536 * 65536");

}, "toResizableBuffer max size");

test(() => {

  const maxNumPages = 4;

  const memory = new WebAssembly.Memory({ initial: 0, maximum: maxNumPages });

  const buffer = memory.toResizableBuffer();

  assert_equals(buffer.byteLength, 0);

  buffer.resize(2 * kPageSize);

  assert_equals(buffer.byteLength, 2 * kPageSize);

  assert_throws_js(RangeError, () => buffer.resize(3 * kPageSize - 1), "Can only grow by page multiples");

  assert_throws_js(RangeError, () => buffer.resize(1 * kPageSize), "Cannot shrink");

}, "Resizing a Memory's resizable buffer");

test(() => {

  const memory = new WebAssembly.Memory({ initial: 0 });

  const buffer = memory.toResizableBuffer();

  assert_throws_js(TypeError, () => buffer.transfer(), "Cannot be detached by JS");

}, "Resizable buffers from Memory cannot be detached by JS");