svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "global-handles.h" |
| 31 | #include "snapshot.h" |
| 32 | #include "cctest.h" |
| 33 | |
| 34 | using namespace v8::internal; |
| 35 | |
| 36 | class DateCacheMock: public DateCache { |
| 37 | public: |
| 38 | struct Rule { |
| 39 | int year, start_month, start_day, end_month, end_day, offset_sec; |
| 40 | }; |
| 41 | |
| 42 | DateCacheMock(int local_offset, Rule* rules, int rules_count) |
| 43 | : local_offset_(local_offset), rules_(rules), rules_count_(rules_count) {} |
| 44 | |
| 45 | protected: |
| 46 | virtual int GetDaylightSavingsOffsetFromOS(int64_t time_sec) { |
| 47 | int days = DaysFromTime(time_sec * 1000); |
| 48 | int time_in_day_sec = TimeInDay(time_sec * 1000, days) / 1000; |
| 49 | int year, month, day; |
| 50 | YearMonthDayFromDays(days, &year, &month, &day); |
| 51 | Rule* rule = FindRuleFor(year, month, day, time_in_day_sec); |
| 52 | return rule == NULL ? 0 : rule->offset_sec * 1000; |
| 53 | } |
| 54 | |
| 55 | |
| 56 | virtual int GetLocalOffsetFromOS() { |
| 57 | return local_offset_; |
| 58 | } |
| 59 | |
| 60 | private: |
| 61 | Rule* FindRuleFor(int year, int month, int day, int time_in_day_sec) { |
| 62 | Rule* result = NULL; |
| 63 | for (int i = 0; i < rules_count_; i++) |
| 64 | if (Match(&rules_[i], year, month, day, time_in_day_sec)) { |
| 65 | result = &rules_[i]; |
| 66 | } |
| 67 | return result; |
| 68 | } |
| 69 | |
| 70 | |
| 71 | bool Match(Rule* rule, int year, int month, int day, int time_in_day_sec) { |
| 72 | if (rule->year != 0 && rule->year != year) return false; |
| 73 | if (rule->start_month > month) return false; |
| 74 | if (rule->end_month < month) return false; |
| 75 | int start_day = ComputeRuleDay(year, rule->start_month, rule->start_day); |
| 76 | if (rule->start_month == month && start_day > day) return false; |
| 77 | if (rule->start_month == month && start_day == day && |
| 78 | 2 * 3600 > time_in_day_sec) |
| 79 | return false; |
| 80 | int end_day = ComputeRuleDay(year, rule->end_month, rule->end_day); |
| 81 | if (rule->end_month == month && end_day < day) return false; |
| 82 | if (rule->end_month == month && end_day == day && |
| 83 | 2 * 3600 <= time_in_day_sec) |
| 84 | return false; |
| 85 | return true; |
| 86 | } |
| 87 | |
| 88 | |
| 89 | int ComputeRuleDay(int year, int month, int day) { |
| 90 | if (day != 0) return day; |
| 91 | int days = DaysFromYearMonth(year, month); |
| 92 | // Find the first Sunday of the month. |
| 93 | while (Weekday(days + day) != 6) day++; |
| 94 | return day + 1; |
| 95 | } |
| 96 | |
| 97 | int local_offset_; |
| 98 | Rule* rules_; |
| 99 | int rules_count_; |
| 100 | }; |
| 101 | |
| 102 | static int64_t TimeFromYearMonthDay(DateCache* date_cache, |
| 103 | int year, |
| 104 | int month, |
| 105 | int day) { |
| 106 | int64_t result = date_cache->DaysFromYearMonth(year, month); |
| 107 | return (result + day - 1) * DateCache::kMsPerDay; |
| 108 | } |
| 109 | |
| 110 | static void CheckDST(int64_t time) { |
| 111 | Isolate* isolate = Isolate::Current(); |
| 112 | DateCache* date_cache = isolate->date_cache(); |
| 113 | int64_t actual = date_cache->ToLocal(time); |
| 114 | int64_t expected = time + date_cache->GetLocalOffsetFromOS() + |
| 115 | date_cache->GetDaylightSavingsOffsetFromOS(time / 1000); |
| 116 | CHECK_EQ(actual, expected); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | TEST(DaylightSavingsTime) { |
| 121 | LocalContext context; |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 122 | v8::Isolate* isolate = context->GetIsolate(); |
| 123 | v8::HandleScope scope(isolate); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 124 | DateCacheMock::Rule rules[] = { |
| 125 | {0, 2, 0, 10, 0, 3600}, // DST from March to November in any year. |
| 126 | {2010, 2, 0, 7, 20, 3600}, // DST from March to August 20 in 2010. |
| 127 | {2010, 7, 20, 8, 10, 0}, // No DST from August 20 to September 10 in 2010. |
| 128 | {2010, 8, 10, 10, 0, 3600}, // DST from September 10 to November in 2010. |
| 129 | }; |
| 130 | |
| 131 | int local_offset_ms = -36000000; // -10 hours. |
| 132 | |
| 133 | DateCacheMock* date_cache = |
| 134 | new DateCacheMock(local_offset_ms, rules, ARRAY_SIZE(rules)); |
| 135 | |
svenpanne@chromium.org | 2bda543 | 2013-03-15 12:39:50 +0000 | [diff] [blame] | 136 | reinterpret_cast<Isolate*>(isolate)->set_date_cache(date_cache); |
svenpanne@chromium.org | 4efbdb1 | 2012-03-12 08:18:42 +0000 | [diff] [blame] | 137 | |
| 138 | int64_t start_of_2010 = TimeFromYearMonthDay(date_cache, 2010, 0, 1); |
| 139 | int64_t start_of_2011 = TimeFromYearMonthDay(date_cache, 2011, 0, 1); |
| 140 | int64_t august_20 = TimeFromYearMonthDay(date_cache, 2010, 7, 20); |
| 141 | int64_t september_10 = TimeFromYearMonthDay(date_cache, 2010, 8, 10); |
| 142 | CheckDST((august_20 + september_10) / 2); |
| 143 | CheckDST(september_10); |
| 144 | CheckDST(september_10 + 2 * 3600); |
| 145 | CheckDST(september_10 + 2 * 3600 - 1000); |
| 146 | CheckDST(august_20 + 2 * 3600); |
| 147 | CheckDST(august_20 + 2 * 3600 - 1000); |
| 148 | CheckDST(august_20); |
| 149 | // Check each day of 2010. |
| 150 | for (int64_t time = start_of_2011 + 2 * 3600; |
| 151 | time >= start_of_2010; |
| 152 | time -= DateCache::kMsPerDay) { |
| 153 | CheckDST(time); |
| 154 | CheckDST(time - 1000); |
| 155 | CheckDST(time + 1000); |
| 156 | } |
| 157 | // Check one day from 2010 to 2100. |
| 158 | for (int year = 2100; year >= 2010; year--) { |
| 159 | CheckDST(TimeFromYearMonthDay(date_cache, year, 5, 5)); |
| 160 | } |
| 161 | CheckDST((august_20 + september_10) / 2); |
| 162 | CheckDST(september_10); |
| 163 | CheckDST(september_10 + 2 * 3600); |
| 164 | CheckDST(september_10 + 2 * 3600 - 1000); |
| 165 | CheckDST(august_20 + 2 * 3600); |
| 166 | CheckDST(august_20 + 2 * 3600 - 1000); |
| 167 | CheckDST(august_20); |
| 168 | } |