diff options
Diffstat (limited to 'absl/time/internal/cctz/src')
-rw-r--r-- | absl/time/internal/cctz/src/time_zone_lookup_test.cc | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc index 0226ab71..134d1430 100644 --- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc +++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc @@ -1182,6 +1182,44 @@ TEST(PrevTransition, AmericaNewYork) { // We have a transition but we don't know which one. } +TEST(NextTransition, Scan) { + for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) { + time_zone tz; + if (!load_time_zone(*np, &tz)) { + continue; // tolerate kTimeZoneNames/zoneinfo skew + } + SCOPED_TRACE(testing::Message() << "In " << *np); + + auto tp = time_point<absl::time_internal::cctz::seconds>::min(); + time_zone::civil_transition trans; + while (tz.next_transition(tp, &trans)) { + time_zone::civil_lookup from_cl = tz.lookup(trans.from); + EXPECT_NE(from_cl.kind, time_zone::civil_lookup::REPEATED); + time_zone::civil_lookup to_cl = tz.lookup(trans.to); + EXPECT_NE(to_cl.kind, time_zone::civil_lookup::SKIPPED); + + auto trans_tp = to_cl.trans; + time_zone::absolute_lookup trans_al = tz.lookup(trans_tp); + EXPECT_EQ(trans_al.cs, trans.to); + auto pre_trans_tp = trans_tp - absl::time_internal::cctz::seconds(1); + time_zone::absolute_lookup pre_trans_al = tz.lookup(pre_trans_tp); + EXPECT_EQ(pre_trans_al.cs + 1, trans.from); + + auto offset_delta = trans_al.offset - pre_trans_al.offset; + EXPECT_EQ(offset_delta, trans.to - trans.from); + if (offset_delta == 0) { + // This "transition" is only an is_dst or abbr change. + EXPECT_EQ(to_cl.kind, time_zone::civil_lookup::UNIQUE); + if (trans_al.is_dst == pre_trans_al.is_dst) { + EXPECT_STRNE(trans_al.abbr, pre_trans_al.abbr); + } + } + + tp = trans_tp; // continue scan from transition + } + } +} + TEST(TimeZoneEdgeCase, AmericaNewYork) { const time_zone tz = LoadZone("America/New_York"); |