tests/corelib_2/regexp/non-greedy-parentheses_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 regression against <a href="https://bugs.webkit.org/show_bug.cgi?id=39289">Wrong result in case of non-iterative matching of subpatterns in non-greedy cases in YARR Interpreter</a>');

  shouldBe(firstMatch("a", new RegExp(r"(a)??")), ["", null]);
  shouldBe(firstMatch("b", new RegExp(r"(a)??")), ["", null]);
  shouldBe(firstMatch("ab", new RegExp(r"(a)??b")), ["ab", "a"]);
  shouldBe(firstMatch("aaab", new RegExp(r"(a+)??b")), ["aaab", "aaa"]);
  shouldBe(
      firstMatch("abbc", new RegExp(r"(a)??(b+)??c")), ["abbc", "a", "bb"]);
  shouldBe(firstMatch("ac", new RegExp(r"(a)??(b)??c")), ["ac", "a", null]);
  shouldBe(firstMatch("abc", new RegExp(r"(a(b)??)??c")), ["abc", "ab", "b"]);
  shouldBe(firstMatch("ac", new RegExp(r"(a(b)??)??c")), ["ac", "a", null]);
}