Reapply "Port regexp tests from V8 to Dart."

tests/corelib/regexp/bol_test.dart

Index: tests/corelib/regexp/bol_test.dart
diff --git a/tests/corelib/regexp/bol_test.dart b/tests/corelib/regexp/bol_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..d2a479e8db091f0576734928e96a26276a636011
--- /dev/null
+++ b/tests/corelib/regexp/bol_test.dart
@@ -0,0 +1,55 @@
+// 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(
+  'Test for beginning of line (BOL or ^) matching</a>'
+  );
+
+  var s = "abc123def456xyzabc789abc999";
+  shouldBeNull(firstMatch(s, new RegExp(r"^notHere")));
+  shouldBe(firstMatch(s, new RegExp(r"^abc")), ["abc"]);
+  shouldBe(firstMatch(s, new RegExp(r"(^|X)abc")), ["abc",""]);
+  shouldBe(firstMatch(s, new RegExp(r"^longer|123")), ["123"]);
+  shouldBe(firstMatch(s, new RegExp(r"(^abc|c)123")), ["abc123","abc"]);
+  shouldBe(firstMatch(s, new RegExp(r"(c|^abc)123")), ["abc123","abc"]);
+  shouldBe(firstMatch(s, new RegExp(r"(^ab|abc)123")), ["abc123","abc"]);
+  shouldBe(firstMatch(s, new RegExp(r"(bc|^abc)([0-9]*)a")), ["bc789a","bc","789"]);
+  shouldBeNull(new RegExp(r"(?:(Y)X)|(X)").firstMatch("abc"));
+  shouldBeNull(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abc"));
+  shouldBeNull(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcd"));
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("Xabcd"), ["X",null]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("aXbcd"), ["X","X"]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abXcd"), ["X","X"]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcXd"), ["X","X"]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcdX"), ["X","X"]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("YXabcd"), ["YX",null]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("aYXbcd"), ["YX",null]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abYXcd"), ["YX",null]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcYXd"), ["YX",null]);
+  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcdYX"), ["YX",null]);
+}