| // Copyright (c) 2013, 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. |
| |
| library utf8_test; |
| |
| import "package:expect/expect.dart"; |
| import 'dart:convert'; |
| |
| List<int> encode(String str) { |
| List<int> bytes; |
| ChunkedConversionSink byteSink = |
| new ByteConversionSink.withCallback((result) => bytes = result); |
| var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink); |
| stringConversionSink.add(str); |
| stringConversionSink.close(); |
| return bytes; |
| } |
| |
| List<int> encode2(String str) { |
| List<int> bytes; |
| ChunkedConversionSink byteSink = |
| new ByteConversionSink.withCallback((result) => bytes = result); |
| var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink); |
| ClosableStringSink stringSink = stringConversionSink.asStringSink(); |
| stringSink.write(str); |
| stringSink.close(); |
| return bytes; |
| } |
| |
| List<int> encode3(String str) { |
| List<int> bytes; |
| ChunkedConversionSink byteSink = |
| new ByteConversionSink.withCallback((result) => bytes = result); |
| var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink); |
| ClosableStringSink stringSink = stringConversionSink.asStringSink(); |
| str.codeUnits.forEach(stringSink.writeCharCode); |
| stringSink.close(); |
| return bytes; |
| } |
| |
| List<int> encode4(String str) { |
| List<int> bytes; |
| ChunkedConversionSink byteSink = |
| new ByteConversionSink.withCallback((result) => bytes = result); |
| var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink); |
| ClosableStringSink stringSink = stringConversionSink.asStringSink(); |
| str.runes.forEach(stringSink.writeCharCode); |
| stringSink.close(); |
| return bytes; |
| } |
| |
| List<int> encode5(String str) { |
| List<int> bytes; |
| ChunkedConversionSink byteSink = |
| new ByteConversionSink.withCallback((result) => bytes = result); |
| var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink); |
| ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false); |
| List<int> tmpBytes = UTF8.encode(str); |
| inputByteSink.add(tmpBytes); |
| inputByteSink.close(); |
| return bytes; |
| } |
| |
| List<int> encode6(String str) { |
| List<int> bytes; |
| ChunkedConversionSink byteSink = |
| new ByteConversionSink.withCallback((result) => bytes = result); |
| var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink); |
| ByteConversionSink inputByteSink = stringConversionSink.asUtf8Sink(false); |
| List<int> tmpBytes = UTF8.encode(str); |
| tmpBytes.forEach((b) => inputByteSink.addSlice([0, b, 1], 1, 2, false)); |
| inputByteSink.close(); |
| return bytes; |
| } |
| |
| List<int> encode7(String str) { |
| List<int> bytes; |
| ChunkedConversionSink byteSink = |
| new ByteConversionSink.withCallback((result) => bytes = result); |
| var stringConversionSink = new Utf8Encoder().startChunkedConversion(byteSink); |
| stringConversionSink.addSlice("1" + str + "2", 1, str.length + 1, false); |
| stringConversionSink.close(); |
| return bytes; |
| } |
| |
| int _nextPowerOf2(v) { |
| assert(v > 0); |
| v--; |
| v |= v >> 1; |
| v |= v >> 2; |
| v |= v >> 4; |
| v |= v >> 8; |
| v |= v >> 16; |
| v++; |
| return v; |
| } |
| |
| runTest(test) { |
| List<int> bytes = test[0]; |
| String string = test[1]; |
| Expect.listEquals(bytes, encode(string)); |
| Expect.listEquals(bytes, encode2(string)); |
| Expect.listEquals(bytes, encode3(string)); |
| Expect.listEquals(bytes, encode4(string)); |
| Expect.listEquals(bytes, encode5(string)); |
| Expect.listEquals(bytes, encode6(string)); |
| Expect.listEquals(bytes, encode7(string)); |
| } |
| |
| main() { |
| const LEADING_SURROGATE = 0xd801; |
| const TRAILING_SURROGATE = 0xdc12; |
| const UTF8_ENCODING = const [0xf0, 0x90, 0x90, 0x92]; |
| const UTF8_LEADING = const [0xed, 0xa0, 0x81]; |
| const UTF8_TRAILING = const [0xed, 0xb0, 0x92]; |
| const CHAR_A = 0x61; |
| |
| // Test surrogates at all kinds of locations. |
| var tests = []; |
| List codeUnits = <int>[]; |
| for (int i = 0; i < 2049; i++) { |
| // Invariant: codeUnits[0..i - 1] is filled with CHAR_A (character 'a'). |
| codeUnits.length = i + 1; |
| codeUnits[i] = CHAR_A; |
| |
| // Only test for problem zones, close to powers of two. |
| if (i > 20 && _nextPowerOf2(i - 2) - i > 10) continue; |
| |
| codeUnits[i] = LEADING_SURROGATE; |
| var str = new String.fromCharCodes(codeUnits); |
| var bytes = new List.filled(i + 3, CHAR_A); |
| bytes[i] = UTF8_LEADING[0]; |
| bytes[i + 1] = UTF8_LEADING[1]; |
| bytes[i + 2] = UTF8_LEADING[2]; |
| runTest([bytes, str]); |
| |
| codeUnits[i] = TRAILING_SURROGATE; |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 3, CHAR_A); |
| bytes[i] = UTF8_TRAILING[0]; |
| bytes[i + 1] = UTF8_TRAILING[1]; |
| bytes[i + 2] = UTF8_TRAILING[2]; |
| runTest([bytes, str]); |
| |
| codeUnits.length = i + 2; |
| codeUnits[i] = LEADING_SURROGATE; |
| codeUnits[i + 1] = TRAILING_SURROGATE; |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 4, CHAR_A); |
| bytes[i] = UTF8_ENCODING[0]; |
| bytes[i + 1] = UTF8_ENCODING[1]; |
| bytes[i + 2] = UTF8_ENCODING[2]; |
| bytes[i + 3] = UTF8_ENCODING[3]; |
| runTest([bytes, str]); |
| |
| codeUnits[i] = TRAILING_SURROGATE; |
| codeUnits[i + 1] = TRAILING_SURROGATE; |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 6, CHAR_A); |
| bytes[i] = UTF8_TRAILING[0]; |
| bytes[i + 1] = UTF8_TRAILING[1]; |
| bytes[i + 2] = UTF8_TRAILING[2]; |
| bytes[i + 3] = UTF8_TRAILING[0]; |
| bytes[i + 4] = UTF8_TRAILING[1]; |
| bytes[i + 5] = UTF8_TRAILING[2]; |
| runTest([bytes, str]); |
| |
| codeUnits[i] = LEADING_SURROGATE; |
| codeUnits[i + 1] = LEADING_SURROGATE; |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 6, CHAR_A); |
| bytes[i] = UTF8_LEADING[0]; |
| bytes[i + 1] = UTF8_LEADING[1]; |
| bytes[i + 2] = UTF8_LEADING[2]; |
| bytes[i + 3] = UTF8_LEADING[0]; |
| bytes[i + 4] = UTF8_LEADING[1]; |
| bytes[i + 5] = UTF8_LEADING[2]; |
| runTest([bytes, str]); |
| |
| codeUnits[i] = TRAILING_SURROGATE; |
| codeUnits[i + 1] = LEADING_SURROGATE; |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 6, CHAR_A); |
| bytes[i] = UTF8_TRAILING[0]; |
| bytes[i + 1] = UTF8_TRAILING[1]; |
| bytes[i + 2] = UTF8_TRAILING[2]; |
| bytes[i + 3] = UTF8_LEADING[0]; |
| bytes[i + 4] = UTF8_LEADING[1]; |
| bytes[i + 5] = UTF8_LEADING[2]; |
| runTest([bytes, str]); |
| |
| codeUnits.length = i + 3; |
| codeUnits[i] = LEADING_SURROGATE; |
| codeUnits[i + 1] = TRAILING_SURROGATE; |
| codeUnits[i + 2] = CHAR_A; // Add trailing 'a'. |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 5, CHAR_A); |
| bytes[i] = UTF8_ENCODING[0]; |
| bytes[i + 1] = UTF8_ENCODING[1]; |
| bytes[i + 2] = UTF8_ENCODING[2]; |
| bytes[i + 3] = UTF8_ENCODING[3]; |
| // No need to assign the 'a' character. The whole list is already filled |
| // with it. |
| runTest([bytes, str]); |
| |
| codeUnits[i] = TRAILING_SURROGATE; |
| codeUnits[i + 1] = TRAILING_SURROGATE; |
| codeUnits[i + 2] = CHAR_A; // Add trailing 'a'. |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 7, CHAR_A); |
| bytes[i] = UTF8_TRAILING[0]; |
| bytes[i + 1] = UTF8_TRAILING[1]; |
| bytes[i + 2] = UTF8_TRAILING[2]; |
| bytes[i + 3] = UTF8_TRAILING[0]; |
| bytes[i + 4] = UTF8_TRAILING[1]; |
| bytes[i + 5] = UTF8_TRAILING[2]; |
| runTest([bytes, str]); |
| |
| codeUnits[i] = LEADING_SURROGATE; |
| codeUnits[i + 1] = LEADING_SURROGATE; |
| codeUnits[i + 2] = CHAR_A; // Add trailing 'a'. |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 7, CHAR_A); |
| bytes[i] = UTF8_LEADING[0]; |
| bytes[i + 1] = UTF8_LEADING[1]; |
| bytes[i + 2] = UTF8_LEADING[2]; |
| bytes[i + 3] = UTF8_LEADING[0]; |
| bytes[i + 4] = UTF8_LEADING[1]; |
| bytes[i + 5] = UTF8_LEADING[2]; |
| runTest([bytes, str]); |
| |
| codeUnits[i] = TRAILING_SURROGATE; |
| codeUnits[i + 1] = LEADING_SURROGATE; |
| codeUnits[i + 2] = CHAR_A; // Add trailing 'a'. |
| str = new String.fromCharCodes(codeUnits); |
| bytes = new List.filled(i + 7, CHAR_A); |
| bytes[i] = UTF8_TRAILING[0]; |
| bytes[i + 1] = UTF8_TRAILING[1]; |
| bytes[i + 2] = UTF8_TRAILING[2]; |
| bytes[i + 3] = UTF8_LEADING[0]; |
| bytes[i + 4] = UTF8_LEADING[1]; |
| bytes[i + 5] = UTF8_LEADING[2]; |
| runTest([bytes, str]); |
| |
| // Make sure the invariant is correct. |
| codeUnits[i] = CHAR_A; |
| } |
| } |