| function assert_ArrayBuffer(actual, { size=0, shared=false, detached=false }, message) { |
| // https://github.com/WebAssembly/spec/issues/840 |
| // See https://github.com/whatwg/html/issues/5380 for why not `self.SharedArrayBuffer` |
| const isShared = !("isView" in actual.constructor); |
| assert_equals(isShared, shared, `${message}: constructor`); |
| const sharedString = shared ? "Shared" : ""; |
| assert_equals(actual.toString(), `[object ${sharedString}ArrayBuffer]`, `${message}: toString()`); |
| assert_equals(Object.getPrototypeOf(actual).toString(), `[object ${sharedString}ArrayBuffer]`, `${message}: prototype toString()`); |
| if (detached) { |
| // https://github.com/tc39/ecma262/issues/678 |
| let byteLength; |
| try { |
| byteLength = actual.byteLength; |
| } catch (e) { |
| byteLength = 0; |
| } |
| assert_equals(byteLength, 0, `${message}: detached size`); |
| } else { |
| assert_equals(actual.byteLength, 0x10000 * size, `${message}: size`); |
| if (size > 0) { |
| const array = new Uint8Array(actual); |
| assert_equals(array[0], 0, `${message}: first element`); |
| assert_equals(array[array.byteLength - 1], 0, `${message}: last element`); |
| } |
| } |
| assert_equals(Object.isFrozen(actual), shared, "buffer frozen"); |
| assert_equals(Object.isExtensible(actual), !shared, "buffer extensibility"); |
| } |
| |
| function assert_Memory(memory, { size=0, shared=false }) { |
| assert_equals(Object.getPrototypeOf(memory), WebAssembly.Memory.prototype, |
| "prototype"); |
| assert_true(Object.isExtensible(memory), "extensible"); |
| |
| // https://github.com/WebAssembly/spec/issues/840 |
| assert_equals(memory.buffer, memory.buffer, "buffer should be idempotent"); |
| assert_ArrayBuffer(memory.buffer, { size, shared }); |
| } |