blob: c941c163d719c553122928c11d4fe281540974f3 [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.9
import 'dart:html';
import 'dart:typed_data';
import 'package:expect/minitest.dart';
main() {
// Only perform tests if ArrayBuffer is supported.
if (!Platform.supportsTypedData) {
return;
}
test('viewTest_dynamic', () {
var a1 = new Uint8List(1024);
for (int i = 0; i < a1.length; i++) {
a1[i] = i; // 0,1,2,...,254,255,0,1,2,...
}
var a2 = new Uint32List.view(a1.buffer);
expect(1024 ~/ 4, a2.length);
expect(a2[0], 0x03020100);
expect(a2[1], 0x07060504);
expect(a2[2], 0x0B0A0908);
expect(a2[50], 0xCBCAC9C8);
expect(a2[51], 0xCFCECDCC);
expect(a2[64], 0x03020100);
a2 = new Uint32List.view(a1.buffer, 200);
expect(a2.length, (1024 - 200) ~/ 4);
expect(a2[0], 0xCBCAC9C8);
expect(a2[1], 0xCFCECDCC);
expect(a2[14], 0x03020100);
a2 = new Uint32List.view(a1.buffer, 456, 20);
expect(a2.length, 20);
expect(a2[0], 0xCBCAC9C8);
expect(a2[1], 0xCFCECDCC);
expect(a2[14], 0x03020100);
// OPTIONALS a2 = new Uint32List.view(a1.buffer, length: 30, byteOffset: 456);
a2 = new Uint32List.view(a1.buffer, 456, 30);
expect(a2.length, 30);
expect(a2[0], 0xCBCAC9C8);
expect(a2[1], 0xCFCECDCC);
expect(a2[14], 0x03020100);
});
test('viewTest_typed', () {
Uint8List a1 = new Uint8List(1024);
for (int i = 0; i < a1.length; i++) {
a1[i] = i;
}
Uint32List a2 = new Uint32List.view(a1.buffer);
expect(a2.length, 1024 ~/ 4);
expect(a2[0], 0x03020100);
expect(a2[50], 0xCBCAC9C8);
expect(a2[51], 0xCFCECDCC);
expect(a2[64], 0x03020100);
a2 = new Uint32List.view(a1.buffer, 200);
expect(a2.length, (1024 - 200) ~/ 4);
expect(a2[0], 0xCBCAC9C8);
expect(a2[1], 0xCFCECDCC);
expect(a2[14], 0x03020100);
a2 = new Uint32List.view(a1.buffer, 456, 20);
expect(20, a2.length);
expect(a2[0], 0xCBCAC9C8);
expect(a2[1], 0xCFCECDCC);
expect(a2[14], 0x03020100);
// OPTIONALS a2 = new Uint32List.view(a1.buffer, length: 30, byteOffset: 456);
a2 = new Uint32List.view(a1.buffer, 456, 30);
expect(a2.length, 30);
expect(a2[0], 0xCBCAC9C8);
expect(a2[1], 0xCFCECDCC);
expect(a2[14], 0x03020100);
});
}