def test_temperature_change_tracks(self):
"""
Test that changes to a grid cell's temperature are reflected properly
in both its temperature value and temperature change value.
"""
temp = 298
r_hum = 37.25
albedo = 0.5
cell = GridCell(temp, r_hum, albedo)
self.assertEqual(cell.get_temperature_change(), 0)
cell.set_temperature(temp + 1)
self.assertEqual(cell.get_temperature(), temp + 1)
self.assertEqual(cell.get_temperature_change(), 1)
cell.set_temperature(temp - 1)
self.assertEqual(cell.get_temperature(), temp - 1)
self.assertEqual(cell.get_temperature_change(), -1)
def test_invalid_temperature_change(self):
"""
Test that an error is raised when a grid cell's temperature is changed
to an invalid value after the cell is instantiated. Also ensures that
the grid cell's temperature is unchanged after the attempt.
"""
cell = GridCell(273.15, 65, 0.6)
cell.set_temperature(274.15)
with self.assertRaises(ValueError):
cell.set_temperature(-1)
self.assertEqual(cell.get_temperature(), 274.15)
self.assertEqual(cell.get_temperature_change(), 1)
def test_valid_init(self):
"""
Test error-free creation of a valid grid cell, and proper returns from
getter methods.
"""
temp = 1
r_hum = 75
albedo = 1
cell = GridCell(temp, r_hum, albedo)
self.assertEqual(cell.get_temperature(), temp)
self.assertEqual(cell.get_relative_humidity(), r_hum)
self.assertEqual(cell.get_albedo(), albedo)
self.assertEqual(cell.get_temperature_change(), 0)