def test_actual_vapour_pressure_dew(self):
station = Station(41.42, 1200)
station.climate = Climate()
day = station.day(130)
self.assertEqual(day.temp_dew, None, "Dew temp is not known")
day.temp_dew = 17.0
self.assertEqual(day.temp_dew, 17.0, "Dew temp is set")
self.assertEqual(day.actual_vapour_pressure(), 1.938,
"Actual vapour pressure with no psychrometric data")
def test_actual_vapour_pressure_psychrometric(self):
station = Station(41.42, 1200)
station.climate = Climate()
day = station.day(130)
day.temp_wet = 19.5
day.temp_dry = 25.6
self.assertEqual(day.atmospheric_pressure(), 87.9, 87.9)
self.assertEqual(day.saturation_vapour_pressure(19.5), 2.267)
self.assertEqual(day.temp_dew, None, "No dew point temperature known")
self.assertEqual(day.actual_vapour_pressure(), 1.91,
"Actual vapour pressure from psychrometric data")
def test_with_no_assumptions(self):
station = Station(41.42, 109)
station.climate = None
day = station.get_day(228) # august 16
day.temp_min = 19.8
day.temp_max = 29.9
day.radiation_s = 264 * 0.0864
day.humidity_min = 37
day.humidity_max = 88
day.wind_speed = 2
self.assertEqual(day.eto(), 5.3)
def test_actual_vapour_pressure_humidity(self):
station = Station(41.42, 1200)
station.climate = Climate()
day = station.day(130)
day.temp_min = 18
day.temp_max = 25
day.humidity_max = 82
day.humidity_min = 54
sat_vap_pres_min = day.saturation_vapour_pressure(day.temp_min)
self.assertEqual(sat_vap_pres_min, 2.064)
sat_vap_pres_max = day.saturation_vapour_pressure(day.temp_max)
self.assertEqual(sat_vap_pres_max, 3.168)
actual_vp = day.actual_vapour_pressure()
self.assertEqual(actual_vp, 1.702)
def test_psychrometric_constant(self):
station = Station(41.42, 1800)
station.climate = Climate()
day = station.day(130)
self.assertEqual(day.psychrometric_constant(), 0.054397,
"psychrometric constant")
def test_atmospheric_pressure(self):
station = Station(41.42, 1800)
station.climate = Climate()
day = station.day(130)
self.assertEqual(day.atmospheric_pressure(), 81.8,
"Atmosphertic pressure")