Invalidate defaultObjects if timezone changes

test/cctest/test-date.cc

 // Copyright 2012 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
@@ skipping 148 matching lines @@
     CheckDST(TimeFromYearMonthDay(date_cache, year, 5, 5));
   }
   CheckDST((august_20 + september_10) / 2);
   CheckDST(september_10);
   CheckDST(september_10 + 2 * 3600);
   CheckDST(september_10 + 2 * 3600 - 1000);
   CheckDST(august_20 + 2 * 3600);
   CheckDST(august_20 + 2 * 3600 - 1000);
   CheckDST(august_20);
 }
+
+TEST(DateCacheVersion) {

[jungshik at Google, 2016/05/19 22:10:31]

This test has to be enclosed by

#ifdef V8_I18N_SUPPORT
#endif 

because %DateCacheVersion is defined in runtime-i18n.cc which is not compiled
when V8_I18N_SUPPORT is not defined. 

[pgorszkowski, 2016/05/20 13:14:56]

Done.

+  FLAG_allow_natives_syntax = true;
+  v8::Isolate* isolate = CcTest::isolate();
+  v8::Isolate::Scope isolate_scope(isolate);
+  v8::HandleScope scope(isolate);
+  v8::Local<v8::Context> context = v8::Context::New(isolate);
+  v8::Context::Scope context_scope(context);
+  v8::Local<v8::Array> date_cache_version =
+      v8::Local<v8::Array>::Cast(CompileRun("%DateCacheVersion()"));

[jungshik at Google, 2016/05/19 22:10:31]

Asan test failed because DateCacheVersion is changed to return only a
version number instead of an array. 

This test has to be adjusted accordingly. 

[pgorszkowski, 2016/05/20 13:14:56]

Done.

+
+  CHECK_EQ(1, static_cast<int32_t>(date_cache_version->Length()));
+  CHECK(date_cache_version->Get(context, 0).ToLocalChecked()->IsNumber());
+  CHECK_EQ(0.0, date_cache_version->Get(context, 0)
+                    .ToLocalChecked()
+                    ->NumberValue(context)
+                    .FromJust());
+
+  v8::Date::DateTimeConfigurationChangeNotification(isolate);
+
+  CHECK_EQ(1, static_cast<int32_t>(date_cache_version->Length()));
+  CHECK(date_cache_version->Get(context, 0).ToLocalChecked()->IsNumber());
+  CHECK_EQ(1.0, date_cache_version->Get(context, 0)
+                    .ToLocalChecked()
+                    ->NumberValue(context)
+                    .FromJust());
+}