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// Copyright 2008 the V8 project authors. All rights reserved.
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// @dart = 2.9

import 'v8_regexp_utils.dart';
import 'package:expect/expect.dart';

void main() {
  // UC16
  // Characters used:
  // "\u03a3\u03c2\u03c3\u039b\u03bb" - Sigma, final sigma, sigma, Lambda,
  // lambda
  shouldBe(
      new RegExp(r"x(.)\1x", caseSensitive: false).firstMatch("x\u03a3\u03c3x"),
      ["x\u03a3\u03c3x", "\u03a3"],
      "backref-UC16");
  assertFalse(
      new RegExp(r"x(...)\1", caseSensitive: false)
          .hasMatch("x\u03a3\u03c2\u03c3\u03c2\u03c3"),
      "\1 ASCII, string short");
  assertTrue(
      new RegExp(r"\u03a3((?:))\1\1x", caseSensitive: false)
          .hasMatch("\u03c2x"),
      "backref-UC16-empty");
  assertTrue(
      new RegExp(r"x(?:...|(...))\1x", caseSensitive: false)
          .hasMatch("x\u03a3\u03c2\u03c3x"),
      "backref-UC16-uncaptured");
  assertTrue(
      new RegExp(r"x(?:...|(...))\1x", caseSensitive: false)
          .hasMatch("x\u03c2\u03c3\u039b\u03a3\u03c2\u03bbx"),
      "backref-UC16-backtrack");
  var longUC16String =
      "x\u03a3\u03c2\u039b\u03c2\u03c3\u03bb\u03c3\u03a3\u03bb";
  shouldBe(
      new RegExp(r"x(...)\1\1", caseSensitive: false)
          .firstMatch(longUC16String),
      [longUC16String, longUC16String.substring(1, 4)],
      "backref-UC16-twice");

  assertFalse(new RegExp(r"\xc1", caseSensitive: false).hasMatch('fooA'),
      "quickcheck-uc16-pattern-ascii-subject");
  assertFalse(new RegExp(r"[\xe9]").hasMatch('i'),
      "charclass-uc16-pattern-ascii-subject");
  assertFalse(new RegExp(r"\u5e74|\u6708").hasMatch('t'),
      "alternation-uc16-pattern-ascii-subject");
}