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// Copyright 2008 the V8 project authors. All rights reserved.
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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",
  );
}