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// Copyright (c) 2019, the Dart project authors. All rights reserved.
// Copyright 2016 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 'package:expect/expect.dart';
import 'v8_regexp_utils.dart';
void main() {
// Testing handling of paired and non-paired surrogates in unicode mode
var r = new RegExp(r".", unicode: true);
var m = r.matchAsPrefix("\ud800\udc00\ud801\udc01");
shouldBe(m, ["\ud800\udc00"]);
assertEquals(m.end, 2);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 1);
shouldBe(m, ["\ud800\udc00"]);
assertEquals(m.end, 2);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 2);
shouldBe(m, ["\ud801\udc01"]);
assertEquals(m.end, 4);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 3);
shouldBe(m, ["\ud801\udc01"]);
assertEquals(m.end, 4);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 4));
m = r.matchAsPrefix("\ud800\udc00\ud801\ud802", 3);
shouldBe(m, ["\ud802"]);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\ud802", 4));
// Testing handling of paired and non-paired surrogates in non-unicode mode
r = new RegExp(r".");
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01");
shouldBe(m, ["\ud800"]);
assertEquals(m.end, 1);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 1);
shouldBe(m, ["\udc00"]);
assertEquals(m.end, 2);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 2);
shouldBe(m, ["\ud801"]);
assertEquals(m.end, 3);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 3);
shouldBe(m, ["\udc01"]);
assertEquals(m.end, 4);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 4));
// Testing same with start anchor, unicode mode.
r = new RegExp("^.", unicode: true);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01");
shouldBe(m, ["\ud800\udc00"]);
assertEquals(2, m.end);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 1);
shouldBe(m, ["\ud800\udc00"]);
assertEquals(2, m.end);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 2));
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 3));
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 4));
// Testing same with start anchor, non-unicode mode.
r = new RegExp("^.");
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01");
shouldBe(m, ["\ud800"]);
assertEquals(1, m.end);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 1));
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 2));
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 3));
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 4));
// Now with both anchored and not as alternatives (with the anchored
// version as a captured group), unicode mode.
r = new RegExp(r"(?:(^.)|.)", unicode: true);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01");
shouldBe(m, ["\ud800\udc00", "\ud800\udc00"]);
assertEquals(m.end, 2);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 1);
shouldBe(m, ["\ud800\udc00", "\ud800\udc00"]);
assertEquals(m.end, 2);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 2);
shouldBe(m, ["\ud801\udc01", null]);
assertEquals(m.end, 4);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 3);
shouldBe(m, ["\ud801\udc01", null]);
assertEquals(m.end, 4);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 4));
m = r.matchAsPrefix("\ud800\udc00\ud801\ud802", 3);
shouldBe(m, ["\ud802", null]);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\ud802", 4));
// Now with both anchored and not as alternatives (with the anchored
// version as a captured group), non-unicode mode.
r = new RegExp(r"(?:(^.)|.)");
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01");
shouldBe(m, ["\ud800", "\ud800"]);
assertEquals(m.end, 1);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 1);
shouldBe(m, ["\udc00", null]);
assertEquals(m.end, 2);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 2);
shouldBe(m, ["\ud801", null]);
assertEquals(m.end, 3);
m = r.matchAsPrefix("\ud800\udc00\ud801\udc01", 3);
shouldBe(m, ["\udc01", null]);
assertEquals(m.end, 4);
assertNull(r.matchAsPrefix("\ud800\udc00\ud801\udc01", 4));
}