| // 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('create', () { |
| var bd = new ByteData(100); |
| expect(bd.lengthInBytes, 100); |
| expect(bd.offsetInBytes, 0); |
| |
| var a1 = new Uint8List.fromList([1, 2, 3, 4, 5, 6, 7, 8]); |
| |
| var bd2 = new ByteData.view(a1.buffer); |
| expect(bd2.lengthInBytes, 8); |
| expect(bd2.offsetInBytes, 0); |
| |
| var bd3 = new ByteData.view(a1.buffer, 2); |
| expect(bd3.lengthInBytes, 6); |
| expect(bd3.offsetInBytes, 2); |
| |
| var bd4 = new ByteData.view(a1.buffer, 3, 4); |
| expect(bd4.lengthInBytes, 4); |
| expect(bd4.offsetInBytes, 3); |
| }); |
| |
| test('access8', () { |
| var a1 = new Uint8List.fromList([0, 0, 3, 255, 0, 0, 0, 0, 0, 0]); |
| |
| var bd = new ByteData.view(a1.buffer, 2, 6); |
| |
| expect(bd.getInt8(0), equals(3)); |
| expect(bd.getInt8(1), equals(-1)); |
| expect(bd.getUint8(0), equals(3)); |
| expect(bd.getUint8(1), equals(255)); |
| |
| bd.setInt8(2, -56); |
| expect(bd.getInt8(2), equals(-56)); |
| expect(bd.getUint8(2), equals(200)); |
| |
| bd.setUint8(3, 200); |
| expect(bd.getInt8(3), equals(-56)); |
| expect(bd.getUint8(3), equals(200)); |
| }); |
| |
| test('access16', () { |
| var a1 = new Uint8List.fromList([0, 0, 3, 255, 0, 0, 0, 0, 0, 0]); |
| |
| var bd = new ByteData.view(a1.buffer, 2); |
| |
| expect(bd.lengthInBytes, equals(10 - 2)); |
| |
| expect(bd.getInt16(0), equals(1023)); |
| expect(bd.getInt16(0, Endian.big), equals(1023)); |
| expect(bd.getInt16(0, Endian.little), equals(-253)); |
| |
| expect(bd.getUint16(0), equals(1023)); |
| expect(bd.getUint16(0, Endian.big), equals(1023)); |
| expect(bd.getUint16(0, Endian.little), equals(0xFF03)); |
| |
| bd.setInt16(2, -1); |
| expect(bd.getInt16(2), equals(-1)); |
| expect(bd.getUint16(2), equals(0xFFFF)); |
| }); |
| |
| test('access32', () { |
| var a1 = new Uint8List.fromList([0, 0, 3, 255, 0, 0, 0, 0, 0, 0]); |
| |
| var bd = new ByteData.view(a1.buffer); |
| |
| expect(bd.getInt32(0), equals(1023)); |
| expect(bd.getInt32(0, Endian.big), equals(1023)); |
| expect(bd.getInt32(0, Endian.little), equals(-0xFD0000)); |
| |
| expect(bd.getUint32(0), equals(1023)); |
| expect(bd.getUint32(0, Endian.big), equals(1023)); |
| expect(bd.getUint32(0, Endian.little), equals(0xFF030000)); |
| }); |
| } |