| // Copyright (c) 2011, 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. |
| |
| import "package:expect/expect.dart"; |
| |
| main() { |
| test(String s, List<int> expectedRunes) { |
| Runes runes = s.runes; |
| Expect.identical(s, runes.string); |
| |
| // for-in |
| var res = []; |
| for (int rune in runes) { |
| res.add(rune); |
| } |
| Expect.listEquals(expectedRunes, res); |
| |
| // manual iteration, backwards. |
| res = []; |
| for (var it = runes.iterator..reset(s.length); it.movePrevious();) { |
| res.add(it.current); |
| } |
| Expect.listEquals(expectedRunes.reversed.toList(), res); |
| |
| // Setting rawIndex. |
| RuneIterator it = runes.iterator; |
| it.rawIndex = 1; |
| Expect.equals(expectedRunes[1], it.current); |
| |
| it = runes.iterator; |
| it.moveNext(); |
| Expect.equals(0, it.rawIndex); |
| it.moveNext(); |
| Expect.equals(1, it.rawIndex); |
| it.moveNext(); |
| Expect.isTrue(1 < it.rawIndex); |
| it.rawIndex = 1; |
| Expect.equals(1, it.rawIndex); |
| Expect.equals(expectedRunes[1], it.current); |
| |
| // Reset, moveNext. |
| it.reset(1); |
| Expect.equals(null, it.rawIndex); |
| Expect.equals(null, it.current); |
| it.moveNext(); |
| Expect.equals(1, it.rawIndex); |
| Expect.equals(expectedRunes[1], it.current); |
| |
| // Reset, movePrevious. |
| it.reset(1); |
| Expect.equals(null, it.rawIndex); |
| Expect.equals(null, it.current); |
| it.movePrevious(); |
| Expect.equals(0, it.rawIndex); |
| Expect.equals(expectedRunes[0], it.current); |
| |
| // .map |
| Expect.listEquals(expectedRunes.map((x) => x.toRadixString(16)).toList(), |
| runes.map((x) => x.toRadixString(16)).toList()); |
| } |
| |
| // First character must be single-code-unit for test. |
| test("abc", [0x61, 0x62, 0x63]); |
| test("\x00\u0000\u{000000}", [0, 0, 0]); |
| test("\u{ffff}\u{10000}\u{10ffff}", [0xffff, 0x10000, 0x10ffff]); |
| String string = new String.fromCharCodes( |
| [0xdc00, 0xd800, 61, 0xd800, 0xdc00, 62, 0xdc00, 0xd800]); |
| test(string, [0xdc00, 0xd800, 61, 0x10000, 62, 0xdc00, 0xd800]); |
| |
| // Setting position in the middle of a surrogate pair is not allowed. |
| var r = new Runes("\u{10000}"); |
| var it = r.iterator; |
| it.moveNext(); |
| Expect.equals(0x10000, it.current); |
| |
| // Setting rawIndex inside surrogate pair. |
| Expect.throws(() { |
| it.rawIndex = 1; |
| }, (e) => e is Error); |
| Expect.throws(() { |
| it.reset(1); |
| }, (e) => e is Error); |
| } |