| // 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> units = s.codeUnits; |
| List<int> expectedUnits = <int>[]; |
| for (int i = 0; i < s.length; i++) { |
| expectedUnits.add(s.codeUnitAt(i)); |
| } |
| |
| Expect.equals(s.length, units.length); |
| for (int i = 0; i < s.length; i++) { |
| Expect.equals(s.codeUnitAt(i), units.elementAt(i)); |
| } |
| |
| // for-in |
| var res = []; |
| for (int unit in units) { |
| res.add(unit); |
| } |
| Expect.listEquals(expectedUnits, res); |
| |
| // .map |
| Expect.listEquals(expectedUnits.map((x) => x.toRadixString(16)).toList(), |
| units.map((x) => x.toRadixString(16)).toList()); |
| |
| if (s == "") { |
| Expect.throws(() => units.first, (e) => e is StateError); |
| Expect.throws(() => units.last, (e) => e is StateError); |
| Expect.throws(() => units[0], (e) => e is RangeError); |
| Expect.throws(() => units[0] = 499, (e) => e is UnsupportedError); |
| Expect.listEquals([], units.sublist(0, 0)); |
| Expect.equals(-1, units.indexOf(42)); |
| Expect.equals(-1, units.lastIndexOf(499)); |
| } else { |
| Expect.equals(s.codeUnitAt(0), units.first); |
| Expect.equals(s.codeUnitAt(s.length - 1), units.last); |
| Expect.equals(s.codeUnitAt(0), units[0]); |
| Expect.throws(() { units[0] = 499; }, (e) => e is UnsupportedError); |
| List<int> sub = units.sublist(1); |
| Expect.listEquals(s.substring(1, s.length).codeUnits, sub); |
| Expect.equals(-1, units.indexOf(-1)); |
| Expect.equals(0, units.indexOf(units[0])); |
| Expect.equals(-1, units.lastIndexOf(-1)); |
| Expect.equals(units.length - 1, units.lastIndexOf(units[units.length - 1])); |
| } |
| |
| Iterable reversed = units.reversed; |
| int i = units.length - 1; |
| for (int codeUnit in reversed) { |
| Expect.equals(units[i--], codeUnit); |
| } |
| } |
| |
| test(""); |
| test("abc"); |
| test("\x00\u0000\u{000000}"); |
| test("\u{ffff}\u{10000}\u{10ffff}"); |
| String string = new String.fromCharCodes( |
| [0xdc00, 0xd800, 61, 0xd9ab, 0xd9ab, 0xddef, 0xddef, 62, 0xdc00, 0xd800]); |
| test(string); |
| string = "\x00\x7f\xff\u0100\ufeff\uffef\uffff" |
| "\u{10000}\u{12345}\u{1d800}\u{1dc00}\u{1ffef}\u{1ffff}"; |
| test(string); |
| |
| // Reading each unit of a surrogate pair works. |
| var r = "\u{10000}".codeUnits; |
| var it = r.iterator; |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(0xD800, it.current); |
| Expect.isTrue(it.moveNext()); |
| Expect.equals(0xDC00, it.current); |
| } |