1 // Copyright 2012 the V8 project authors. All rights reserved.
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3 // modification, are permitted provided that the following conditions are
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26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 #include "src/v8.h"
29
30 #include "src/global-handles.h"
31 #include "src/snapshot.h"
32 #include "test/cctest/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
DateCacheMock(int local_offset,Rule * rules,int rules_count)42 DateCacheMock(int local_offset, Rule* rules, int rules_count)
43 : local_offset_(local_offset), rules_(rules), rules_count_(rules_count) {}
44
45 protected:
GetDaylightSavingsOffsetFromOS(int64_t time_sec)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
GetLocalOffsetFromOS()56 virtual int GetLocalOffsetFromOS() {
57 return local_offset_;
58 }
59
60 private:
FindRuleFor(int year,int month,int day,int time_in_day_sec)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
Match(Rule * rule,int year,int month,int day,int time_in_day_sec)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
ComputeRuleDay(int year,int month,int day)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
TimeFromYearMonthDay(DateCache * date_cache,int year,int month,int day)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
CheckDST(int64_t time)111 static void CheckDST(int64_t time) {
112 Isolate* isolate = CcTest::i_isolate();
113 DateCache* date_cache = isolate->date_cache();
114 int64_t actual = date_cache->ToLocal(time);
115 int64_t expected = time + date_cache->GetLocalOffsetFromOS() +
116 date_cache->GetDaylightSavingsOffsetFromOS(time / 1000);
117 CHECK_EQ(actual, expected);
118 }
119
120
TEST(DaylightSavingsTime)121 TEST(DaylightSavingsTime) {
122 LocalContext context;
123 v8::Isolate* isolate = context->GetIsolate();
124 v8::HandleScope scope(isolate);
125 DateCacheMock::Rule rules[] = {
126 {0, 2, 0, 10, 0, 3600}, // DST from March to November in any year.
127 {2010, 2, 0, 7, 20, 3600}, // DST from March to August 20 in 2010.
128 {2010, 7, 20, 8, 10, 0}, // No DST from August 20 to September 10 in 2010.
129 {2010, 8, 10, 10, 0, 3600}, // DST from September 10 to November in 2010.
130 };
131
132 int local_offset_ms = -36000000; // -10 hours.
133
134 DateCacheMock* date_cache =
135 new DateCacheMock(local_offset_ms, rules, arraysize(rules));
136
137 reinterpret_cast<Isolate*>(isolate)->set_date_cache(date_cache);
138
139 int64_t start_of_2010 = TimeFromYearMonthDay(date_cache, 2010, 0, 1);
140 int64_t start_of_2011 = TimeFromYearMonthDay(date_cache, 2011, 0, 1);
141 int64_t august_20 = TimeFromYearMonthDay(date_cache, 2010, 7, 20);
142 int64_t september_10 = TimeFromYearMonthDay(date_cache, 2010, 8, 10);
143 CheckDST((august_20 + september_10) / 2);
144 CheckDST(september_10);
145 CheckDST(september_10 + 2 * 3600);
146 CheckDST(september_10 + 2 * 3600 - 1000);
147 CheckDST(august_20 + 2 * 3600);
148 CheckDST(august_20 + 2 * 3600 - 1000);
149 CheckDST(august_20);
150 // Check each day of 2010.
151 for (int64_t time = start_of_2011 + 2 * 3600;
152 time >= start_of_2010;
153 time -= DateCache::kMsPerDay) {
154 CheckDST(time);
155 CheckDST(time - 1000);
156 CheckDST(time + 1000);
157 }
158 // Check one day from 2010 to 2100.
159 for (int year = 2100; year >= 2010; year--) {
160 CheckDST(TimeFromYearMonthDay(date_cache, year, 5, 5));
161 }
162 CheckDST((august_20 + september_10) / 2);
163 CheckDST(september_10);
164 CheckDST(september_10 + 2 * 3600);
165 CheckDST(september_10 + 2 * 3600 - 1000);
166 CheckDST(august_20 + 2 * 3600);
167 CheckDST(august_20 + 2 * 3600 - 1000);
168 CheckDST(august_20);
169 }
170
171
TEST(DateCacheVersion)172 TEST(DateCacheVersion) {
173 FLAG_allow_natives_syntax = true;
174 v8::Isolate* isolate = CcTest::isolate();
175 v8::Isolate::Scope isolate_scope(isolate);
176 v8::HandleScope scope(isolate);
177 v8::Handle<v8::Context> context = v8::Context::New(isolate);
178 v8::Context::Scope context_scope(context);
179 v8::Handle<v8::Array> date_cache_version =
180 v8::Handle<v8::Array>::Cast(CompileRun("%DateCacheVersion()"));
181
182 CHECK_EQ(1, static_cast<int32_t>(date_cache_version->Length()));
183 CHECK(date_cache_version->Get(0)->IsNumber());
184 CHECK_EQ(0.0, date_cache_version->Get(0)->NumberValue());
185
186 v8::Date::DateTimeConfigurationChangeNotification(isolate);
187
188 CHECK_EQ(1, static_cast<int32_t>(date_cache_version->Length()));
189 CHECK(date_cache_version->Get(0)->IsNumber());
190 CHECK_EQ(1.0, date_cache_version->Get(0)->NumberValue());
191 }
192