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This commit is contained in:
J. Nick Koston
2026-01-30 01:46:57 -06:00
parent a1eef9870c
commit cde2199b64
1 changed files with 58 additions and 0 deletions
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58
tests/components/time/posix_tz_parser.cpp
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@@ -1200,4 +1200,62 @@ TEST(RecalcTimestampLocal, YearBoundaryDST) {
EXPECT_EQ(jan1 - dec31, 3600); // 1 hour difference
}
// ============================================================================
// ESPTime::timezone_offset() tests
// ============================================================================
TEST(TimezoneOffset, NoTimezone) {
// When no timezone is set, offset should be 0
time::ParsedTimezone tz{};
set_global_tz(tz);
int32_t offset = ESPTime::timezone_offset();
EXPECT_EQ(offset, 0);
}
TEST(TimezoneOffset, FixedOffsetPositive) {
// India: UTC+5:30 (no DST)
const char *tz_str = "IST-5:30";
time::ParsedTimezone tz{};
ASSERT_TRUE(parse_posix_tz(tz_str, tz));
set_global_tz(tz);
int32_t offset = ESPTime::timezone_offset();
// Offset should be +5:30 = 19800 seconds (to add to UTC to get local)
EXPECT_EQ(offset, 5 * 3600 + 30 * 60);
}
TEST(TimezoneOffset, FixedOffsetNegative) {
// US Eastern Standard Time: UTC-5 (testing without DST rules)
const char *tz_str = "EST5";
time::ParsedTimezone tz{};
ASSERT_TRUE(parse_posix_tz(tz_str, tz));
set_global_tz(tz);
int32_t offset = ESPTime::timezone_offset();
// Offset should be -5 hours = -18000 seconds
EXPECT_EQ(offset, -5 * 3600);
}
TEST(TimezoneOffset, WithDstReturnsCorrectOffsetBasedOnCurrentTime) {
// US Eastern with DST
const char *tz_str = "EST5EDT,M3.2.0,M11.1.0";
time::ParsedTimezone tz{};
ASSERT_TRUE(parse_posix_tz(tz_str, tz));
set_global_tz(tz);
// Get current time and check offset matches expected based on DST status
time_t now = ::time(nullptr);
int32_t offset = ESPTime::timezone_offset();
// Verify offset matches what is_in_dst says
if (time::is_in_dst(now, tz)) {
// During DST, offset should be -4 hours (EDT)
EXPECT_EQ(offset, -4 * 3600);
} else {
// During standard time, offset should be -5 hours (EST)
EXPECT_EQ(offset, -5 * 3600);
}
}
} // namespace esphome::testing