tests/corelib_2/regexp/UC16_test.dart

// Copyright (c) 2014, the Dart project authors. All rights reserved.
// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// @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");
}