| // Copyright (c) 2017, 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. |
| |
| /// @assertion ByteData asByteData([int offsetInBytes = 0, int length ]) |
| /// Creates a ByteData view of a region of this byte buffer. |
| /// The view is backed by the bytes of this byte buffer. Any changes made to |
| /// the ByteData will also change the buffer, and vice versa. |
| /// @description Checks that method asByteData creates a ByteData view of a |
| /// region of this byte buffer, and any changes made to ByteData will also change |
| /// the buffer, and vice versa. The checking is done for buffers of lists with |
| /// different elements size. |
| /// @author ngl@unipro.ru |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| void check(ByteBuffer buffer) { |
| int bufSizeInBytes = buffer.lengthInBytes; |
| var res = buffer.asByteData(0); |
| ByteData res1 = buffer.asByteData(0); |
| int viewSizeInBytes = res.lengthInBytes; |
| |
| Expect.isTrue(res is ByteData); |
| Expect.runtimeIsType<ByteData>(res); |
| Expect.equals(bufSizeInBytes, viewSizeInBytes); |
| |
| if (viewSizeInBytes != 0) { |
| // set value to the first byte of res1 |
| res1.setInt8(0, 2); |
| // the first byte of res is equal to the set value |
| Expect.equals(2, res.getInt8(0)); |
| |
| // set value to the last byte of res |
| res.setInt8(viewSizeInBytes - 1, 4); |
| // the last byte of res1 is equal to the set value |
| Expect.equals(4, res1.getInt8(viewSizeInBytes - 1)); |
| } |
| Expect.notEquals(res, res1); |
| Expect.equals(res.buffer, res1.buffer); |
| } |
| |
| main() { |
| var list0 = <int>[]; |
| var list1 = new List.filled(1, 0); |
| var list2 = new List.filled(5, 0); |
| var list3 = new Int32x4List(1); |
| var list4 = new Int32x4List(5); |
| var list5 = new Int32x4List(0); |
| |
| check((new Int8List.fromList(list0)).buffer); |
| check((new Int8List.fromList(list1)).buffer); |
| check((new Int8List.fromList(list2)).buffer); |
| |
| check((new Int16List.fromList(list0)).buffer); |
| check((new Int16List.fromList(list1)).buffer); |
| check((new Int16List.fromList(list2)).buffer); |
| |
| check((new Int32List.fromList(list0)).buffer); |
| check((new Int32List.fromList(list1)).buffer); |
| check((new Int32List.fromList(list2)).buffer); |
| |
| if (!isJS) { |
| check((new Int64List.fromList(list0)).buffer); |
| check((new Int64List.fromList(list1)).buffer); |
| check((new Int64List.fromList(list2)).buffer); |
| } |
| |
| check((new Int32x4List.fromList(list5)).buffer); |
| check((new Int32x4List.fromList(list3)).buffer); |
| check((new Int32x4List.fromList(list4)).buffer); |
| } |