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lrn@google.com3520e882013-02-12 15:22:31 +00001// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
2// for details. All rights reserved. Use of this source code is governed by a
3// BSD-style license that can be found in the LICENSE file.
4
floitsch@google.com8fd6d0a2013-04-05 19:43:16 +00005import "package:expect/expect.dart";
6
lrn@google.com3520e882013-02-12 15:22:31 +00007main() {
8 test(String s, List<int> expectedRunes) {
9 Runes runes = s.runes;
10 Expect.identical(s, runes.string);
11
12 // for-in
13 var res = [];
14 for (int rune in runes) {
15 res.add(rune);
16 }
17 Expect.listEquals(expectedRunes, res);
18
19 // manual iteration, backwards.
20 res = [];
21 for (var it = runes.iterator..reset(s.length); it.movePrevious();) {
22 res.add(it.current);
23 }
24 Expect.listEquals(expectedRunes.reversed.toList(), res);
25
26 // Setting rawIndex.
27 RuneIterator it = runes.iterator;
28 it.rawIndex = 1;
29 Expect.equals(expectedRunes[1], it.current);
30
31 it = runes.iterator;
32 it.moveNext();
33 Expect.equals(0, it.rawIndex);
34 it.moveNext();
35 Expect.equals(1, it.rawIndex);
36 it.moveNext();
37 Expect.isTrue(1 < it.rawIndex);
38 it.rawIndex = 1;
39 Expect.equals(1, it.rawIndex);
40 Expect.equals(expectedRunes[1], it.current);
41
42 // Reset, moveNext.
43 it.reset(1);
44 Expect.equals(null, it.rawIndex);
45 Expect.equals(null, it.current);
46 it.moveNext();
47 Expect.equals(1, it.rawIndex);
48 Expect.equals(expectedRunes[1], it.current);
49
50 // Reset, movePrevious.
51 it.reset(1);
52 Expect.equals(null, it.rawIndex);
53 Expect.equals(null, it.current);
54 it.movePrevious();
55 Expect.equals(0, it.rawIndex);
56 Expect.equals(expectedRunes[0], it.current);
57
58 // .map
59 Expect.listEquals(expectedRunes.map((x) => x.toRadixString(16)).toList(),
60 runes.map((x) => x.toRadixString(16)).toList());
61 }
62
63 // First character must be single-code-unit for test.
64 test("abc", [0x61, 0x62, 0x63]);
65 test("\x00\u0000\u{000000}", [0, 0, 0]);
66 test("\u{ffff}\u{10000}\u{10ffff}", [0xffff, 0x10000, 0x10ffff]);
67 String string = new String.fromCharCodes(
68 [0xdc00, 0xd800, 61, 0xd800, 0xdc00, 62, 0xdc00, 0xd800]);
69 test(string, [0xdc00, 0xd800, 61, 0x10000, 62, 0xdc00, 0xd800]);
70
71 // Setting position in the middle of a surrogate pair is not allowed.
72 var r = new Runes("\u{10000}");
73 var it = r.iterator;
74 it.moveNext();
75 Expect.equals(0x10000, it.current);
76
77 // Setting rawIndex inside surrogate pair.
78 Expect.throws(() { it.rawIndex = 1; }, (e) => e is Error);
79 Expect.throws(() { it.reset(1); }, (e) => e is Error);
80}