blob: 074ca909c6687af4ecbc19685c1039d85e59140b [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.
// @dart = 2.9
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.throwsStateError(() => units.first);
Expect.throwsStateError(() => units.last);
Expect.throwsRangeError(() => units[0]);
Expect.throwsUnsupportedError(() => units[0] = 499);
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.throwsUnsupportedError(() => units[0] = 499);
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);
}