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LibWeb: Import tests for resizable/growable ArrayBuffer Wasm memories

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We pass to-fixed-length-buffer.any.html and to-resizable-buffer.any.html
but not to-resizable-buffer-shared.any.html, because LibJS doesn't have
growable SharedArrayBuffers implemented...
This commit is contained in:
CountBleck
2025-08-20 18:17:22 -07:00
committed by Ali Mohammad Pur
parent d0d5bffb2d
commit 7575beafcb
Notes: github-actions[bot] 2025-08-23 06:27:35 +00:00 
Author: https://github.com/CountBleck
Commit: https://github.com/LadybirdBrowser/ladybird/commit/7575beafcb0
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5889
Reviewed-by: https://github.com/alimpfard ✅
9 changed files with 221 additions and 0 deletions
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15
Tests/LibWeb/Text/input/wpt-import/wasm/jsapi/memory/to-fixed-length-buffer.any.html Normal file
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<!doctype html>
<meta charset=utf-8>
<script>
self.GLOBAL = {
isWindow: function() { return true; },
isWorker: function() { return false; },
isShadowRealm: function() { return false; },
};
</script>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../wasm/jsapi/wasm-module-builder.js"></script>
<div id=log></div>
<script src="../../../wasm/jsapi/memory/to-fixed-length-buffer.any.js"></script>

42
Tests/LibWeb/Text/input/wpt-import/wasm/jsapi/memory/to-fixed-length-buffer.any.js Normal file
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// 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, maximum: 1 });
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");

15
Tests/LibWeb/Text/input/wpt-import/wasm/jsapi/memory/to-resizable-buffer-shared.any.html Normal file
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<!doctype html>
<meta charset=utf-8>
<script>
self.GLOBAL = {
isWindow: function() { return true; },
isWorker: function() { return false; },
isShadowRealm: function() { return false; },
};
</script>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../wasm/jsapi/wasm-module-builder.js"></script>
<div id=log></div>
<script src="../../../wasm/jsapi/memory/to-resizable-buffer-shared.any.js"></script>

36
Tests/LibWeb/Text/input/wpt-import/wasm/jsapi/memory/to-resizable-buffer-shared.any.js Normal file
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// 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");

15
Tests/LibWeb/Text/input/wpt-import/wasm/jsapi/memory/to-resizable-buffer.any.html Normal file
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<!doctype html>
<meta charset=utf-8>
<script>
self.GLOBAL = {
isWindow: function() { return true; },
isWorker: function() { return false; },
isShadowRealm: function() { return false; },
};
</script>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<script src="../../../wasm/jsapi/wasm-module-builder.js"></script>
<div id=log></div>
<script src="../../../wasm/jsapi/memory/to-resizable-buffer.any.js"></script>

72
Tests/LibWeb/Text/input/wpt-import/wasm/jsapi/memory/to-resizable-buffer.any.js Normal file
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// 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, maximum: 1 });
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");
}
}, "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, maximum: 1 });
const buffer = memory.toResizableBuffer();
assert_throws_js(TypeError, () => buffer.transfer(), "Cannot be detached by JS");
}, "Resizable buffers from Memory cannot be detached by JS");