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// Copyright 2013 the V8 project authors. All rights reserved.
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
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import 'v8_regexp_utils.dart';
import 'package:expect/expect.dart';

void main() {
  description('Test regular expression processing with alternatives.');

  var s1 = "<p>content</p>";
  shouldBe(firstMatch(s1, new RegExp(r"<((\\/([^>]+)>)|(([^>]+)>))")), [
    "<p>",
    "p>",
    null,
    null,
    "p>",
    "p",
  ]);
  shouldBe(firstMatch(s1, new RegExp(r"<((ABC>)|(\\/([^>]+)>)|(([^>]+)>))")), [
    "<p>",
    "p>",
    null,
    null,
    null,
    "p>",
    "p",
  ]);
  shouldBe(firstMatch(s1, new RegExp(r"<(a|\\/p|.+?)>")), ["<p>", "p"]);

  // Force YARR to use Interpreter by using iterative parentheses
  shouldBe(firstMatch(s1, new RegExp(r"<((\\/([^>]+)>)|((([^>])+)>))")), [
    "<p>",
    "p>",
    null,
    null,
    "p>",
    "p",
    "p",
  ]);
  shouldBe(
    firstMatch(s1, new RegExp(r"<((ABC>)|(\\/([^>]+)>)|((([^>])+)>))")),
    ["<p>", "p>", null, null, null, "p>", "p", "p"],
  );
  shouldBe(firstMatch(s1, new RegExp(r"<(a|\\/p|(.)+?)>")), ["<p>", "p", "p"]);

  // Force YARR to use Interpreter by using backreference
  var s2 = "<p>p</p>";
  shouldBe(firstMatch(s2, new RegExp(r"<((\\/([^>]+)>)|(([^>]+)>))\5")), [
    "<p>p",
    "p>",
    null,
    null,
    "p>",
    "p",
  ]);
  shouldBe(
    firstMatch(s2, new RegExp(r"<((ABC>)|(\\/([^>]+)>)|(([^>]+)>))\6")),
    ["<p>p", "p>", null, null, null, "p>", "p"],
  );
  shouldBe(firstMatch(s2, new RegExp(r"<(a|\\/p|.+?)>\1")), ["<p>p", "p"]);
}