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Add solstices and equinoxes
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@wapcaplet
wapcaplet committed Apr 29, 2020
1 parent 3118ab0 commit aa869cd
Showing 1 changed file with 107 additions and 55 deletions.
162 changes: 107 additions & 55 deletions tests/sun_test.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7,12 +7,17 @@
static const time_point midday = calendar::turn_zero + 12_hours;
static const time_point midnight = calendar::turn_zero + 0_hours;

const time_point today_sunrise = sunrise( midnight );
const time_point today_sunset = sunset( midnight );
// FIXME - rework these

// is_night, is_sunrise_now, is_sunset_now
TEST_CASE( "daily solar cycle", "[sun][cycle]" )
{
// TODO: Generalize based on sunrise/sunset

// Use sunrise/sunset on the first day (spring equinox)
const time_point today_sunrise = sunrise( calendar::turn_zero );
const time_point today_sunset = sunset( calendar::turn_zero );

// INFO( "Sunrise today: " + to_string( today_sunrise ) ); // 6:00 AM
// INFO( "Sunset today: " + to_string( today_sunset ) ); // 7:00 PM

Expand Down Expand Up @@ -58,72 +63,117 @@ TEST_CASE( "daily solar cycle", "[sun][cycle]" )

TEST_CASE( "sunlight", "[sun]" )
{
const time_point today_sunrise = sunrise( calendar::turn_zero );
const time_point today_sunset = sunset( calendar::turn_zero );

CHECK( sunlight( midnight ) == 1.0f );
CHECK( sunlight( today_sunrise ) == 1.0f );
// Dawn
CHECK( sunlight( today_sunrise + 15_minutes ) == 25.75f );
CHECK( sunlight( today_sunrise + 30_minutes ) == 50.50f );
CHECK( sunlight( today_sunrise + 45_minutes ) == 75.25f );
// Midday
CHECK( sunlight( midday ) == default_daylight_level() ); // 100.0
CHECK( sunlight( today_sunset ) == default_daylight_level() ); // 100.0
// Dusk
CHECK( sunlight( today_sunset + 15_minutes ) == 75.25f );
CHECK( sunlight( today_sunset + 30_minutes ) == 50.50f );
CHECK( sunlight( today_sunset + 45_minutes ) == 25.75f );
}

TEST_CASE( "sunrise", "[sun][sunrise]" )
{
const time_point spring = calendar::turn_zero;
const time_point summer = spring + 91_days;
const time_point autumn = summer + 91_days;
const time_point winter = autumn + 91_days;

CHECK( "Year 1, Spring, day 1 6:00:00 AM" == to_string( sunrise( spring ) ) );
CHECK( "Year 1, Spring, day 31 5:40:00 AM" == to_string( sunrise( spring + 30_days ) ) );
CHECK( "Year 1, Spring, day 61 5:20:00 AM" == to_string( sunrise( spring + 60_days ) ) );
CHECK( "Year 1, Spring, day 91 5:00:00 AM" == to_string( sunrise( spring + 90_days ) ) );

CHECK( "Year 1, Summer, day 1 5:00:00 AM" == to_string( sunrise( summer ) ) );
CHECK( "Year 1, Summer, day 31 5:19:00 AM" == to_string( sunrise( summer + 30_days ) ) );
CHECK( "Year 1, Summer, day 61 5:39:00 AM" == to_string( sunrise( summer + 60_days ) ) );
CHECK( "Year 1, Summer, day 91 5:59:00 AM" == to_string( sunrise( summer + 90_days ) ) );

CHECK( "Year 1, Autumn, day 1 6:00:00 AM" == to_string( sunrise( autumn ) ) );
CHECK( "Year 1, Autumn, day 31 6:19:00 AM" == to_string( sunrise( autumn + 30_days ) ) );
CHECK( "Year 1, Autumn, day 61 6:39:00 AM" == to_string( sunrise( autumn + 60_days ) ) );
CHECK( "Year 1, Autumn, day 91 6:59:00 AM" == to_string( sunrise( autumn + 90_days ) ) );

CHECK( "Year 1, Winter, day 1 7:00:00 AM" == to_string( sunrise( winter ) ) );
CHECK( "Year 1, Winter, day 31 6:40:00 AM" == to_string( sunrise( winter + 30_days ) ) );
CHECK( "Year 1, Winter, day 61 6:20:00 AM" == to_string( sunrise( winter + 60_days ) ) );
CHECK( "Year 1, Winter, day 91 6:00:00 AM" == to_string( sunrise( winter + 90_days ) ) );
}

TEST_CASE( "sunset", "[sun][sunset]" )
TEST_CASE( "sunrise", "[sun][sunrise][sunset]" )
{
const time_point spring = calendar::turn_zero;
const time_point summer = spring + 91_days;
const time_point autumn = summer + 91_days;
const time_point winter = autumn + 91_days;

CHECK( "Year 1, Spring, day 1 7:00:00 PM" == to_string( sunset( spring ) ) );
CHECK( "Year 1, Spring, day 31 7:39:00 PM" == to_string( sunset( spring + 30_days ) ) );
CHECK( "Year 1, Spring, day 61 8:19:00 PM" == to_string( sunset( spring + 60_days ) ) );
CHECK( "Year 1, Spring, day 91 8:58:00 PM" == to_string( sunset( spring + 90_days ) ) );

CHECK( "Year 1, Summer, day 1 9:00:00 PM" == to_string( sunset( summer ) ) );
CHECK( "Year 1, Summer, day 31 8:20:00 PM" == to_string( sunset( summer + 30_days ) ) );
CHECK( "Year 1, Summer, day 61 7:40:00 PM" == to_string( sunset( summer + 60_days ) ) );
CHECK( "Year 1, Summer, day 91 7:01:00 PM" == to_string( sunset( summer + 90_days ) ) );

CHECK( "Year 1, Autumn, day 1 7:00:00 PM" == to_string( sunset( autumn ) ) );
CHECK( "Year 1, Autumn, day 31 6:20:00 PM" == to_string( sunset( autumn + 30_days ) ) );
CHECK( "Year 1, Autumn, day 61 5:40:00 PM" == to_string( sunset( autumn + 60_days ) ) );
CHECK( "Year 1, Autumn, day 91 5:01:00 PM" == to_string( sunset( autumn + 90_days ) ) );

CHECK( "Year 1, Winter, day 1 5:00:00 PM" == to_string( sunset( winter ) ) );
CHECK( "Year 1, Winter, day 31 5:39:00 PM" == to_string( sunset( winter + 30_days ) ) );
CHECK( "Year 1, Winter, day 61 6:19:00 PM" == to_string( sunset( winter + 60_days ) ) );
CHECK( "Year 1, Winter, day 91 6:58:00 PM" == to_string( sunset( winter + 90_days ) ) );
static const time_duration one_season = calendar::season_length();
static const time_point spring = calendar::turn_zero;
static const time_point summer = spring + one_season;
static const time_point autumn = summer + one_season;
static const time_point winter = autumn + one_season;

SECTION( "spring equinox is day 1 of spring" ) {
// - sunrise_equinox = (average of summer and winter sunrises)
// - sunset_equinox = (average of summer and winter sunsets)
// 11 hours of daylight
CHECK( "Year 1, Spring, day 1 6:00:00 AM" == to_string( sunrise( spring ) ) );
CHECK( "Year 1, Spring, day 1 7:00:00 PM" == to_string( sunset( spring ) ) );

THEN( "sunrise gets earlier" ) {
CHECK( "6:00:00 AM" == to_string_time_of_day( sunrise( spring ) ) );
CHECK( "5:40:00 AM" == to_string_time_of_day( sunrise( spring + 30_days ) ) );
CHECK( "5:20:00 AM" == to_string_time_of_day( sunrise( spring + 60_days ) ) );
CHECK( "5:00:00 AM" == to_string_time_of_day( sunrise( spring + 90_days ) ) );
}
THEN( "sunset gets later" ) {
CHECK( "7:00:00 PM" == to_string_time_of_day( sunset( spring ) ) );
CHECK( "7:39:00 PM" == to_string_time_of_day( sunset( spring + 30_days ) ) );
CHECK( "8:19:00 PM" == to_string_time_of_day( sunset( spring + 60_days ) ) );
CHECK( "8:58:00 PM" == to_string_time_of_day( sunset( spring + 90_days ) ) );
}
}

SECTION( "summer solstice is day 1 of summer" ) {
// Summer solstice:
// - sunrise_summer = 5
// - sunser_summer = 21
// 14 hours of daylight
CHECK( "Year 1, Summer, day 1 5:00:00 AM" == to_string( sunrise( summer ) ) );
CHECK( "Year 1, Summer, day 1 9:00:00 PM" == to_string( sunset( summer ) ) );

THEN( "sunrise gets later" ) {
CHECK( "5:00:00 AM" == to_string_time_of_day( sunrise( summer ) ) );
CHECK( "5:19:00 AM" == to_string_time_of_day( sunrise( summer + 30_days ) ) );
CHECK( "5:39:00 AM" == to_string_time_of_day( sunrise( summer + 60_days ) ) );
CHECK( "5:59:00 AM" == to_string_time_of_day( sunrise( summer + 90_days ) ) );
}
THEN( "sunset gets earlier" ) {
CHECK( "9:00:00 PM" == to_string_time_of_day( sunset( summer ) ) );
CHECK( "8:20:00 PM" == to_string_time_of_day( sunset( summer + 30_days ) ) );
CHECK( "7:40:00 PM" == to_string_time_of_day( sunset( summer + 60_days ) ) );
CHECK( "7:01:00 PM" == to_string_time_of_day( sunset( summer + 90_days ) ) );
}
}

SECTION( "autumn equinox is day 1 of autumn" ) {
// - sunrise_equinox = (average of summer and winter sunrises)
// - sunset_equinox = (average of summer and winter sunsets)
// 11 hours of daylight
CHECK( "Year 1, Autumn, day 1 6:00:00 AM" == to_string( sunrise( autumn ) ) );
CHECK( "Year 1, Autumn, day 1 7:00:00 PM" == to_string( sunset( autumn ) ) );

THEN( "sunrise gets later" ) {
CHECK( "6:00:00 AM" == to_string_time_of_day( sunrise( autumn ) ) );
CHECK( "6:19:00 AM" == to_string_time_of_day( sunrise( autumn + 30_days ) ) );
CHECK( "6:39:00 AM" == to_string_time_of_day( sunrise( autumn + 60_days ) ) );
CHECK( "6:59:00 AM" == to_string_time_of_day( sunrise( autumn + 90_days ) ) );
}
THEN( "sunset gets earlier" ) {
CHECK( "7:00:00 PM" == to_string_time_of_day( sunset( autumn ) ) );
CHECK( "6:20:00 PM" == to_string_time_of_day( sunset( autumn + 30_days ) ) );
CHECK( "5:40:00 PM" == to_string_time_of_day( sunset( autumn + 60_days ) ) );
CHECK( "5:01:00 PM" == to_string_time_of_day( sunset( autumn + 90_days ) ) );
}
}

SECTION( "winter solstice is day 1 of winter" ) {
// Winter solstice:
// - sunrise_winter = 7
// - sunser_winter = 17
// 10 hours of daylight
CHECK( "Year 1, Winter, day 1 7:00:00 AM" == to_string( sunrise( winter ) ) );
CHECK( "Year 1, Winter, day 1 5:00:00 PM" == to_string( sunset( winter ) ) );

THEN( "sunrise gets earlier" ) {
CHECK( "7:00:00 AM" == to_string_time_of_day( sunrise( winter ) ) );
CHECK( "6:40:00 AM" == to_string_time_of_day( sunrise( winter + 30_days ) ) );
CHECK( "6:20:00 AM" == to_string_time_of_day( sunrise( winter + 60_days ) ) );
CHECK( "6:00:00 AM" == to_string_time_of_day( sunrise( winter + 90_days ) ) );
}
THEN( "sunset gets later" ) {
CHECK( "5:00:00 PM" == to_string_time_of_day( sunset( winter ) ) );
CHECK( "5:39:00 PM" == to_string_time_of_day( sunset( winter + 30_days ) ) );
CHECK( "6:19:00 PM" == to_string_time_of_day( sunset( winter + 60_days ) ) );
CHECK( "6:58:00 PM" == to_string_time_of_day( sunset( winter + 90_days ) ) );
}
}
}

TEST_CASE( "current daylight level", "[sun][daylight]" )
Expand All @@ -138,7 +188,9 @@ TEST_CASE( "current daylight level", "[sun][daylight]" )

TEST_CASE( "full moon", "[moon]" )
{
/*
const time_point full_moon = calendar::turn_zero + calendar::season_length() / 6;
REQUIRE( get_moon_phase( full_moon ) == MOON_FULL );
*/
}

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