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deps/v8/test/mjsunit/tzoffset-transition-moscow.js

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+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --icu-timezone-data
+// Environment Variables: TZ=Europe/Moscow
+
+// https://www.timeanddate.com/time/zone/russia/moscow
+
+// 2010-03-28T02:00 : UTC+3 => UTC+4
+assertEquals(new Date(Date.UTC(2010, 2, 27, 22, 59)),
+   new Date(2010, 2, 28, 1, 59));
+assertEquals(new Date(Date.UTC(2010, 2, 27, 23)),
+   new Date(2010, 2, 28, 2));
+assertEquals(new Date(Date.UTC(2010, 2, 27, 23, 30)),
+   new Date(2010, 2, 28, 2, 30));
+assertEquals(new Date(Date.UTC(2010, 2, 27, 23)),
+   new Date(2010, 2, 28, 3));
+assertEquals(new Date(Date.UTC(2010, 2, 27, 23, 30)),
+   new Date(2010, 2, 28, 3, 30));
+assertEquals((new Date(2010, 2, 28, 3, 30)).getTimezoneOffset(),
+   (new Date(2010, 2, 28, 2, 30)).getTimezoneOffset());
+
+// 2010-10-31T03:00 : UTC+4 => UTC+3
+assertEquals(new Date(Date.UTC(2010, 9, 30, 21, 59)),
+   new Date(2010, 9, 31, 1, 59));
+assertEquals(new Date(Date.UTC(2010, 9, 30, 22)),
+   new Date(2010, 9, 31, 2));
+assertEquals(new Date(Date.UTC(2010, 9, 30, 22, 30)),
+   new Date(2010, 9, 31, 2, 30));
+assertEquals(new Date(Date.UTC(2010, 9, 30, 22, 59)),
+   new Date(2010, 9, 31, 2, 59))
+assertEquals(new Date(Date.UTC(2010, 9, 31, 0)),
+   new Date(2010, 9, 31, 3))
+assertEquals(new Date(Date.UTC(2010, 9, 31, 0, 30)),
+   new Date(2010, 9, 31, 3, 30))
+
+// 2011-03-27T02:00 : UTC+3 => UTC+4
+assertEquals(new Date(Date.UTC(2011, 2, 26, 22, 59)),
+   new Date(2011, 2, 27, 1, 59))
+assertEquals(new Date(Date.UTC(2011, 2, 26, 23)),
+   new Date(2011, 2, 27, 2));
+assertEquals(new Date(Date.UTC(2011, 2, 26, 23, 30)),
+   new Date(2011, 2, 27, 2, 30));
+assertEquals(new Date(Date.UTC(2011, 2, 26, 23)),
+   new Date(2011, 2, 27, 3));
+assertEquals(new Date(Date.UTC(2011, 2, 26, 23, 30)),
+   new Date(2011, 2, 27, 3, 30));
+assertEquals((new Date(2011, 2, 27, 3, 30)).getTimezoneOffset(),
+   (new Date(2011, 2, 27, 2, 30)).getTimezoneOffset());
+
+// No daylight saving time in 2012, 2013: UTC+4 year-round
+assertEquals(new Date(Date.UTC(2012, 5, 21, 0)),
+   new Date(2012, 5, 21, 4))
+assertEquals(new Date(Date.UTC(2012, 11, 21, 0)),
+   new Date(2012, 11, 21, 4))
+assertEquals(new Date(Date.UTC(2013, 5, 21, 0)),
+   new Date(2013, 5, 21, 4))
+assertEquals(new Date(Date.UTC(2013, 11, 21, 0)),
+   new Date(2013, 11, 21, 4))
+
+// 2014-10-26T0200: UTC+4 => UTC+3 (year-round)
+assertEquals(new Date(Date.UTC(2014, 9, 25, 20, 59)),
+   new Date(2014, 9, 26, 0, 59));
+assertEquals(new Date(Date.UTC(2014, 9, 25, 21)),
+   new Date(2014, 9, 26, 1));
+assertEquals(new Date(Date.UTC(2014, 9, 25, 21, 30)),
+   new Date(2014, 9, 26, 1, 30));
+assertEquals(new Date(Date.UTC(2014, 9, 25, 21, 59)),
+   new Date(2014, 9, 26, 1, 59))
+assertEquals(new Date(Date.UTC(2014, 9, 25, 23)),
+   new Date(2014, 9, 26, 2))
+assertEquals(new Date(Date.UTC(2014, 9, 25, 23, 1)),
+   new Date(2014, 9, 26, 2, 1))
+
+assertEquals(new Date(Date.UTC(2014, 11, 21, 0)),
+   new Date(2014, 11, 21, 3))
+assertEquals(new Date(Date.UTC(2015, 5, 21, 0)),
+   new Date(2015, 5, 21, 3))
+assertEquals(new Date(Date.UTC(2015, 11, 21, 0)),
+   new Date(2015, 11, 21, 3))
+assertEquals(new Date(Date.UTC(2016, 5, 21, 0)),
+   new Date(2016, 5, 21, 3))
+assertEquals(new Date(Date.UTC(2015, 11, 21, 0)),
+   new Date(2015, 11, 21, 3))