to-resizable-buffer-shared.any.js

Enable keyboard shortcuts

This test has a WPT meta file that expects 3 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /wasm/jsapi/memory/to-resizable-buffer-shared.any.js - WPT Dashboard Interop Dashboard
- /wasm/jsapi/memory/to-resizable-buffer-shared.any.html - WPT Dashboard Interop Dashboard
- /wasm/jsapi/memory/to-resizable-buffer-shared.any.worker.html - WPT Dashboard Interop Dashboard

// META: global=window,dedicatedworker,jsshell

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

test(() => {

  const memory = new WebAssembly.Memory({ initial: 0, maximum: 4, shared: true });

  const buffer1 = memory.buffer;

  assert_false(buffer1.growable, "By default the SAB is initially not growable");

  const buffer2 = memory.toResizableBuffer();

  assert_true(buffer2.growable);

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

  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, shared: true });

  const buffer = memory.toResizableBuffer();

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

}, "toResizableBuffer max size");

test(() => {

  const memory = new WebAssembly.Memory({ initial: 0, maximum: 4, shared: true });

  const buffer = memory.toResizableBuffer();

  assert_equals(buffer.byteLength, 0);

  buffer.grow(2 * kPageSize);

  assert_equals(buffer.byteLength, 2 * kPageSize);

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

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