to-fixed-length-buffer.any.js

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /wasm/jsapi/memory/to-fixed-length-buffer.any.js - WPT Dashboard Interop Dashboard
- /wasm/jsapi/memory/to-fixed-length-buffer.any.html - WPT Dashboard Interop Dashboard
- /wasm/jsapi/memory/to-fixed-length-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, "toFixedLengthBuffer");

  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.toFixedLengthBuffer();

  assert_equals(buffer1, buffer2, "Not changing resizability does not make a new object");

  const buffer3 = memory.toResizableBuffer();

  assert_not_equals(buffer2, buffer3, "Changing resizability makes a new object");

  assert_true(buffer3.resizable);

  assert_true(buffer2.detached);

  assert_equals(memory.buffer, buffer3);

}, "toFixedLengthBuffer caching behavior");