Reapply "Port regexp tests from V8 to Dart."

tests/corelib/regexp/ecma-regex-examples_test.dart

+// Copyright (c) 2014, the Dart project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  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.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+
+import 'v8_regexp_utils.dart';
+import 'package:expect/expect.dart';
+
+void main() {
+  description(
+  "This page tests the regex examples from the ECMA-262 specification."
+  );
+
+  var regex01 = new RegExp(r"a|ab");
+  shouldBe(regex01.firstMatch("abc"), ["a"]);
+
+  var regex02 = new RegExp(r"((a)|(ab))((c)|(bc))");
+  shouldBe(regex02.firstMatch("abc"), ["abc", "a", "a", null, "bc", null, "bc"]);
+
+  var regex03 = new RegExp(r"a[a-z]{2,4}");
+  shouldBe(regex03.firstMatch("abcdefghi"), ["abcde"]);
+
+  var regex04 = new RegExp(r"a[a-z]{2,4}?");
+  shouldBe(regex04.firstMatch("abcdefghi"), ["abc"]);
+
+  var regex05 = new RegExp(r"(aa|aabaac|ba|b|c)*");
+  shouldBe(regex05.firstMatch("aabaac"), ["aaba", "ba"]);
+
+  var regex06 = new RegExp(r"^(a+)\1*,\1+$");
+  Expect.equals("aaaaaaaaaa,aaaaaaaaaaaaaaa".replaceAllMapped(regex06,(m) => m.group(1)), "aaaaa");
+
+  var regex07 = new RegExp(r"(z)((a+)?(b+)?(c))*");
+  shouldBe(regex07.firstMatch("zaacbbbcac"), ["zaacbbbcac", "z", "ac", "a", null, "c"]);
+
+  var regex08 = new RegExp(r"(a*)*");
+  shouldBe(regex08.firstMatch("b"), ["", null]);
+
+  var regex09 = new RegExp(r"(a*)b\1+");
+  shouldBe(regex09.firstMatch("baaaac"), ["b", ""]);
+
+  var regex10 = new RegExp(r"(?=(a+))");
+  shouldBe(regex10.firstMatch("baaabac"), ["", "aaa"]);
+
+  var regex11 = new RegExp(r"(?=(a+))a*b\1");
+  shouldBe(regex11.firstMatch("baaabac"), ["aba", "a"]);
+
+  var regex12 = new RegExp(r"(.*?)a(?!(a+)b\2c)\2(.*)");
+  shouldBe(regex12.firstMatch("baaabaac"), ["baaabaac", "ba", null, "abaac"]);
+}