tests/corelib/regexp/unicode-handling_test.dart

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// Copyright 2013 the V8 project authors. All rights reserved.
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import 'v8_regexp_utils.dart';
import 'package:expect/expect.dart';

void main() {
  description(
      'Test for proper handling of Unicode RegExps and <a href="http://bugzilla.webkit.org/show_bug.cgi?id=7445">bug 7445</a>: Gmail puts wrong subject in replies.');

  // Regex to match Re in various languages straight from Gmail source
  var I3 = new RegExp(
      r"^\s*(fwd|re|aw|antw|antwort|wg|sv|ang|odp|betreff|betr|transf|reenv\.|reenv|in|res|resp|resp\.|enc|\u8f6c\u53d1|\u56DE\u590D|\u041F\u0435\u0440\u0435\u0441\u043B|\u041E\u0442\u0432\u0435\u0442):\s*(.*)$",
      caseSensitive: false);

  // Other RegExs from Gmail source
  var Ci = new RegExp(r"\s+");
  var BC = new RegExp(r"^ ");
  var BG = new RegExp(r" $");

  // This function replaces consecutive whitespace with a single space
  // then removes a leading and trailing space if they exist. (From Gmail)
  dynamic Gn(a) {
    return a.replaceAll(Ci, " ").replaceAll(BC, "").replaceAll(BG, "");
  }

  // Strips leading Re or similar (from Gmail source)
  dynamic cy(a) {
    //var b = I3.firstMatch(a);
    var b = I3.firstMatch(a);

    if (b != null) {
      a = b.group(2);
    }

    return Gn(a);
  }

  assertEquals(cy('Re: Moose'), 'Moose');
  assertEquals(cy('\u8f6c\u53d1: Moose'), 'Moose');

  // Test handling of \u2820 (skull and crossbones)
  var sample = "sample bm\u2820p cm\\u2820p";

  var inlineRe = new RegExp(r".m\u2820p");
  assertEquals(inlineRe.firstMatch(sample)!.group(0), 'bm\u2820p');

  // Test handling of \u007c "|"
  var bsample = "sample bm\u007cp cm\\u007cp";

  var binlineRe = new RegExp(r".m\u007cp");

  assertEquals(binlineRe.firstMatch(bsample)!.group(0), 'bm|p');
}