public void TestSolarTimes_PositiveLatLong()
{
// set up
double latitude = 48.137222; // munich
double longitude = 11.575556;
var date1 = new DateTimeOffset(2020, 7, 31, 12, 0, 0, TimeSpan.FromHours(2.0)); // MESZ
var date2 = new DateTimeOffset(2020, 12, 5, 12, 0, 0, TimeSpan.FromHours(1.0)); // MEZ
// run
var times1 = SunCalc.GetTimes(date1, latitude, longitude);
var times2 = SunCalc.GetTimes(date2, latitude, longitude);
// check
// 2020-07-31: 05:48 - 20:50
Assert.IsTrue(times1.Sunrise.HasValue, "sunrise must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times1.Sunrise.Value, 5, 48), "sunrise time must match");
Assert.IsTrue(times1.Sunset.HasValue, "sunset must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times1.Sunset.Value, 20, 50), "sunset time must match");
// 2020-12-05: 07:48 - 16:20
Assert.IsTrue(times2.Sunrise.HasValue, "sunrise must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times2.Sunrise.Value, 7, 48), "sunrise time must match");
Assert.IsTrue(times2.Sunset.HasValue, "sunset must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times2.Sunset.Value, 16, 20), "sunset time must match");
}
public void GetTimes_returns_null_if_event_does_not_occur()
{
var times = SunCalc.GetTimes(DateTime.Parse("2020-05-21 12:00:00"), 51.9947, -1.4819);
times.Night.Should().BeNull();
times.NightEnd.Should().BeNull();
}
public void TestSolarTimes_NearEquator()
{
// set up
double latitude = -8.506810; // Ubud, Bali, Indonesia
double longitude = 115.262482;
var date = new DateTimeOffset(2020, 7, 1, 12, 0, 0, TimeSpan.FromHours(8));
// run
var times = SunCalc.GetTimes(date, latitude, longitude);
// check
// 2020-07-01: 06:33 - 18:11
Assert.IsTrue(times.Sunrise.HasValue, "sunrise must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times.Sunrise.Value, 6, 33), "sunrise time must match");
Assert.IsTrue(times.Sunset.HasValue, "sunset must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times.Sunset.Value, 18, 11), "sunset time must match");
TimeSpan sunriseDuration = times.SunriseSunsetTimes[SunTimeType.SunriseEnd] - times.Sunrise.Value;
TimeSpan sunsetDuration = times.Sunset.Value - times.SunriseSunsetTimes[SunTimeType.SunsetStart];
Assert.AreEqual(2.3, sunriseDuration.TotalMinutes, 0.1, "sunrise duration must be 2.3 minutes");
Assert.AreEqual(2.3, sunsetDuration.TotalMinutes, 0.1, "sunset duration must be 2.3 minutes");
}
public void TestSolarTimes_AllDayUp_AllDayDown()
{
// set up
double latitude = -70.674444; // Neumayer-Station III
double longitude = -8.274167;
var date1 = new DateTimeOffset(2020, 6, 21, 12, 0, 0, TimeSpan.Zero); // UTC
var date2 = new DateTimeOffset(2020, 12, 21, 12, 0, 0, TimeSpan.Zero);
// run
var times1 = SunCalc.GetTimes(date1, latitude, longitude);
var times2 = SunCalc.GetTimes(date2, latitude, longitude);
// check
// midwinter
Assert.IsFalse(times1.Sunrise.HasValue, "sunrise must not have been set");
Assert.IsFalse(times1.Sunset.HasValue, "sunset must not have been set");
// midsummer
Assert.IsFalse(times2.Sunrise.HasValue, "sunrise must not have been set");
Assert.IsFalse(times2.Sunset.HasValue, "sunset must not have been set");
// the difference between midwinter and midsummer is that midwinter has no Night times set
Assert.IsTrue(times1.SunriseSunsetTimes.ContainsKey(SunTimeType.Night), "midwinter has a Night time set");
Assert.IsFalse(times2.SunriseSunsetTimes.ContainsKey(SunTimeType.Night), "midsummer has no Night time set");
}
public void GetTimes_adjusts_sun_phases_when_additionally_given_the_observer_height()
{
var times = SunCalc.GetTimes(_date, _lat, _lng, _height);
times.SolarNoon.ToDateString().Should().Be("2013-03-05T10:10:57Z");
times.Nadir.ToDateString().Should().Be("2013-03-04T22:10:57Z");
times.Sunrise.ToDateString().Should().Be("2013-03-05T04:25:07Z");
times.Sunset.ToDateString().Should().Be("2013-03-05T15:56:46Z");
}
public void TestSolarTimes_HeightAboveHorizon()
{
// set up
double latitude = 48.137222;
double longitude = 11.575556;
var date = new DateTimeOffset(2020, 7, 31, 12, 0, 0, TimeSpan.FromHours(2.0));
// run
var times1 = SunCalc.GetTimes(date, latitude, longitude);
var times2 = SunCalc.GetTimes(date, latitude, longitude, 100.0);
// check
TimeSpan deltaSunrise = times2.Sunrise.Value - times1.Sunrise.Value;
TimeSpan deltaSunset = times2.Sunset.Value - times1.Sunset.Value;
Assert.AreEqual(-2.3, deltaSunrise.TotalMinutes, 0.1, "sunrise 100m above must be 2 minutes earlier");
Assert.AreEqual(2.3, deltaSunset.TotalMinutes, 0.1, "sunset 100m above must be 2 minutes later");
}
public void TestSolarTimes_DayWithLastSunrise()
{
// set up
double latitude = 79.988889; // Eureka, Nunavut, Canada
double longitude = -85.940833;
var date = new DateTimeOffset(2020, 4, 12, 12, 0, 0, TimeSpan.FromHours(-5));
// run
var times = SunCalc.GetTimes(date, latitude, longitude);
// check
// 2020-04-12: 01:41 - no sunset
Assert.IsTrue(times.Sunrise.HasValue, "sunrise must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times.Sunrise.Value, 1, 41), "sunrise time must match");
//// strange, timeanddate has no sunset value; might be a bug?
////Assert.IsFalse(times.Sunset.HasValue, "sunset must have been set");
}
public void TestSolarTimes_SunsetOnTheNextDay()
{
// set up
double latitude = 64.475528; // somewhere in iceland
double longitude = -20.253140;
var date = new DateTimeOffset(2020, 6, 21, 12, 0, 0, TimeSpan.Zero); // GMT
// run
var times = SunCalc.GetTimes(date, latitude, longitude);
// check
// 2020-07-31: 02:39 - 00:05 (+1 day)
Assert.IsTrue(times.Sunrise.HasValue, "sunrise must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times.Sunrise.Value, 2, 39), "sunrise time must match");
Assert.IsTrue(times.Sunset.HasValue, "sunset must have been set");
Assert.AreEqual(date.DayOfYear + 1, times.Sunset.Value.DayOfYear, "sunset must be one day ahead");
Assert.IsTrue(CheckMatchingTimeOfDay(times.Sunset.Value, 0, 5), "sunset time must match");
}
public void TestSolarTimes_BeforeAndAfterTimezoneChange()
{
// set up
double latitude = 48.137222; // munich
double longitude = 11.575556;
var date1 = new DateTimeOffset(2020, 10, 24, 12, 0, 0, TimeSpan.FromHours(2.0)); // MESZ
var date2 = new DateTimeOffset(2020, 10, 25, 12, 0, 0, TimeSpan.FromHours(1.0)); // MEZ
// run
var times1 = SunCalc.GetTimes(date1, latitude, longitude);
var times2 = SunCalc.GetTimes(date2, latitude, longitude);
// check
// 2020-10-24: 07:47 - 18:07
Assert.IsTrue(times1.Sunrise.HasValue, "sunrise must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times1.Sunrise.Value, 7, 47), "sunrise time must match");
Assert.IsTrue(times1.Sunset.HasValue, "sunset must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times1.Sunset.Value, 18, 7), "sunset time must match");
// 2020-10-25: 06:48 - 17:06
Assert.IsTrue(times2.Sunrise.HasValue, "sunrise must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times2.Sunrise.Value, 6, 48), "sunrise time must match");
Assert.IsTrue(times2.Sunset.HasValue, "sunset must have been set");
Assert.IsTrue(CheckMatchingTimeOfDay(times2.Sunset.Value, 17, 06), "sunset time must match");
// difference must be (about) one hour backwards
Assert.AreEqual(
-1.0,
(times2.Sunrise.Value.TimeOfDay - times1.Sunrise.Value.TimeOfDay).TotalHours,
0.1,
"sunrise time zone difference must be 1h");
Assert.AreEqual(
-1.0,
(times2.Sunset.Value.TimeOfDay - times1.Sunset.Value.TimeOfDay).TotalHours,
0.1,
"sunset time zone difference must be 1h");
}
public void GetTimes_returns_SunsetStart_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.SunsetStart.ToDateString().Should().Be("2013-03-05T15:43:34Z");
}
public void GetTimes_returns_SunriseEnd_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.SunriseEnd.ToDateString().Should().Be("2013-03-05T04:38:19Z");
}
public void GetTimes_returns_Nadir_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.Nadir.ToDateString().Should().Be("2013-03-04T22:10:57Z");
}
public void GetTimes_returns_SolarNoon_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.SolarNoon.ToDateString().Should().Be("2013-03-05T10:10:57Z");
}
public void GetTimes_returns_NightEnd_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.NightEnd.ToDateString().Should().Be("2013-03-05T02:46:17Z");
}
public void GetTimes_returns_Dusk_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.Dusk.ToDateString().Should().Be("2013-03-05T16:19:36Z");
}
public void GetTimes_returns_NauticalDawn_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.NauticalDawn.ToDateString().Should().Be("2013-03-05T03:24:31Z");
}
public void GetTimes_returns_GoldenHour_for_the_given_date_and_location()
{
var times = SunCalc.GetTimes(_date, _lat, _lng);
times.GoldenHour.ToDateString().Should().Be("2013-03-05T15:02:52Z");
}
