1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// 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");
|
