blob: f0dbd54e7673522838e916987c728887a4bdbffa [file] [log] [blame]
// 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);
}