Reapply "Port regexp tests from V8 to Dart."

tests/corelib/regexp/no-extensions_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(
+  'Tests that regular expressions do not have extensions that diverge from the JavaScript specification. '
+  + 'Because WebKit originally used a copy of PCRE, various non-JavaScript regular expression features were historically present. '
+  + 'Also tests various related edge cases.'
+  );
+
+  shouldBeNull(new RegExp(r"\\x{41}").firstMatch("yA1"));
+  assertEquals(new RegExp(r"[\x{41}]").firstMatch("yA1").group(0), "1");
+  assertEquals(new RegExp(r"\x1g").firstMatch("x1g").group(0), "x1g");
+  assertEquals(new RegExp(r"[\x1g]").firstMatch("x").group(0), "x");
+  assertEquals(new RegExp(r"[\x1g]").firstMatch("1").group(0), "1");
+  assertEquals(new RegExp(r"\2147483648").firstMatch(new String.fromCharCode(140) + "7483648").group(0), new String.fromCharCode(140) + "7483648");
+  assertEquals(new RegExp(r"\4294967296").firstMatch("\"94967296").group(0), "\"94967296");
+  assertEquals(new RegExp(r"\8589934592").firstMatch("\8589934592").group(0), "\8589934592");
+  assertEquals("\nAbc\n".replaceAllMapped(new RegExp(r"(\n)[^\n]+$"), (m) => m.group(1)), "\nAbc\n");
+  shouldBeNull(new RegExp(r"x$").firstMatch("x\n"));
+  assertThrows(() => new RegExp(r"x++"));
+  shouldBeNull(new RegExp(r"[]]").firstMatch("]"));
+
+  assertEquals(new RegExp(r"\060").firstMatch("y01").group(0), "0");
+  assertEquals(new RegExp(r"[\060]").firstMatch("y01").group(0), "0");
+  assertEquals(new RegExp(r"\606").firstMatch("y06").group(0), "06");
+  assertEquals(new RegExp(r"[\606]").firstMatch("y06").group(0), "0");
+  assertEquals(new RegExp(r"[\606]").firstMatch("y6").group(0), "6");
+  assertEquals(new RegExp(r"\101").firstMatch("yA1").group(0), "A");
+  assertEquals(new RegExp(r"[\101]").firstMatch("yA1").group(0), "A");
+  assertEquals(new RegExp(r"\1011").firstMatch("yA1").group(0), "A1");
+  assertEquals(new RegExp(r"[\1011]").firstMatch("yA1").group(0), "A");
+  assertEquals(new RegExp(r"[\1011]").firstMatch("y1").group(0), "1");
+  assertEquals(new RegExp(r"\10q").firstMatch("y" + new String.fromCharCode(8) + "q").group(0), new String.fromCharCode(8) + "q");
+  assertEquals(new RegExp(r"[\10q]").firstMatch("y" + new String.fromCharCode(8) + "q").group(0), new String.fromCharCode(8));
+  assertEquals(new RegExp(r"\1q").firstMatch("y" + new String.fromCharCode(1) + "q").group(0), new String.fromCharCode(1) + "q");
+  assertEquals(new RegExp(r"[\1q]").firstMatch("y" + new String.fromCharCode(1) + "q").group(0), new String.fromCharCode(1));
+  assertEquals(new RegExp(r"[\1q]").firstMatch("yq").group(0), "q");
+  assertEquals(new RegExp(r"\8q").firstMatch("\8q").group(0), "\8q");
+  assertEquals(new RegExp(r"[\8q]").firstMatch("y8q").group(0), "8");
+  assertEquals(new RegExp(r"[\8q]").firstMatch("yq").group(0), "q");
+  shouldBe(new RegExp(r"(x)\1q").firstMatch("xxq"), ["xxq", "x"]);
+  shouldBe(new RegExp(r"(x)[\1q]").firstMatch("xxq"), ["xq", "x"]);
+  shouldBe(new RegExp(r"(x)[\1q]").firstMatch("xx" + new String.fromCharCode(1)), ["x" + new String.fromCharCode(1), "x"]);
+}