Robert Nystrom
11b81715ad
Change-Id: I7b5e5dd768c87f28848ee02050582d23f3604cb1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/426286 Reviewed-by: Alexander Markov <alexmarkov@google.com> Commit-Queue: Alexander Markov <alexmarkov@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
53 lines
1.6 KiB
Dart
53 lines
1.6 KiB
Dart
// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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//
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// Verifies that string equal implementation correctly handles strings of
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// various lengths.
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import 'dart:math';
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import "package:expect/expect.dart";
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compare(List<int> ints, String s_piece, String t_piece, bool expectedEquality) {
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final s = String.fromCharCodes(ints);
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String s_mid = s + s_piece + s;
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String t_mid = s + t_piece + s;
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Expect.isFalse(identical(s_mid, t_mid));
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Expect.equals(s_mid == t_mid, expectedEquality);
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String s_tail = s + s_piece;
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String t_tail = s + t_piece;
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Expect.isFalse(identical(s_tail, t_tail));
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Expect.equals(s_tail == t_tail, expectedEquality);
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String s_head = s_piece + s;
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String t_head = t_piece + s;
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Expect.isFalse(identical(s_head, t_head));
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Expect.equals(s_head == t_head, expectedEquality);
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}
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main() {
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const int maxStringLength = 128;
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// OneByteString
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for (int i = 0; i < maxStringLength; i++) {
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final l = List.generate(i, (n) => (Random().nextInt(30) + 40));
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compare(l, 'a', 'b', false);
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compare(l, 'a', 'a', true);
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}
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// TwoByteString
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for (int i = 0; i < maxStringLength; i++) {
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final l = List.generate(i, (n) => (Random().nextInt(1024) + 1024));
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compare(
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l,
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String.fromCharCodes(<int>[1042]),
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String.fromCharCodes(<int>[1043]),
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false,
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);
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compare(
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l,
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String.fromCharCodes(<int>[1042]),
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String.fromCharCodes(<int>[1042]),
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true,
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);
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}
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}
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