def test_daynight_terminator_raises_exception_hour(self):
"""Test an exception is raised if hour out of range"""
utc_hour = -10.0
msg = 'Hour must be between 0 and 24.0'
with self.assertRaisesRegex(ValueError, msg):
daynight_terminator(self.longitudes,
self.day_of_year, utc_hour)
def test_daynight_terminator_raises_exception_day_of_year(self):
"""Test an exception is raised if day of year out of range"""
day_of_year = 367
msg = 'Day of the year must be between 0 and 365'
with self.assertRaisesRegex(ValueError, msg):
daynight_terminator(self.longitudes,
day_of_year, self.utc_hour)
def test_basic_sprint_360(self):
"""Test we get the terminator in spring with lon > 180."""
longitudes = np.linspace(0.0, 360.0, 21)
result = daynight_terminator(longitudes, 100, 0.0)
expected_lats = np.array([
82.7926115,
82.44008918,
81.15273499,
77.95206547,
68.09955141,
2.64493534,
-67.37718951,
-77.7625883,
-81.07852035,
-82.41166928,
-82.7926115,
-82.44008918,
-81.15273499,
-77.9520655,
-68.09955141,
-2.64493534,
67.37718951,
77.7625883,
81.07852035,
82.41166928,
82.7926115,
])
self.assertArrayAlmostEqual(result, expected_lats)
def test_basic_winter_360(self):
"""Test we get the terminator in winter with lon > 180."""
longitudes = np.linspace(0.0, 360.0, 21)
result = daynight_terminator(longitudes, 10, 12.0)
expected_lats = np.array([
67.79151577,
66.97565648,
63.73454167,
56.33476507,
39.67331783,
4.36090124,
-34.38678745,
-54.03238506,
-62.69165892,
-66.55543647,
-67.79151577,
-66.97565648,
-63.73454167,
-56.33476507,
-39.67331783,
-4.36090124,
34.38678745,
54.03238506,
62.69165892,
66.55543647,
67.79151577,
])
self.assertIsInstance(result, np.ndarray)
self.assertArrayAlmostEqual(result, expected_lats)
def test_daynight_terminator_raises_exception_lon(self):
"""Test an exception is raised if latitudes out of range"""
longitudes = np.array([-205.0, 0.0, 5.0])
msg = 'Longitudes must be between -180.0 and 180.0'
with self.assertRaisesRegex(ValueError, msg):
daynight_terminator(longitudes, self.day_of_year, self.utc_hour)
