def test_invalid_method(self):
"""
Test that the plugin can handle an invalid method being passed in.
"""
plugin = Plugin('smallest distance')
msg = 'Unknown method'
with self.assertRaisesRegex(AttributeError, msg):
plugin.process(self.cube, self.sites, self.ancillary_data)
def without_ancillary_data(self,
method,
vertical_bias=None,
land_constraint=False):
"""Test plugins behaviour with no ancillary data provided."""
plugin = Plugin(method, vertical_bias, land_constraint)
if method == 'fast_nearest_neighbour':
result = plugin.process(self.cube, self.sites, {})
self.assertIsInstance(result, np.ndarray)
else:
with self.assertRaises(KeyError):
plugin.process(self.cube, self.sites, {})
def test_invalid_no_neighbours(self):
"""
Test use of a larger but invalid no of neighbours over which to find
the minimum vertical displacement.
"""
plugin = Plugin(method='minimum_height_error_neighbour',
vertical_bias=None,
land_constraint=False)
msg = 'Invalid nearest no'
with self.assertRaisesRegex(ValueError, msg):
plugin.process(self.cube,
self.sites,
self.ancillary_data,
no_neighbours=20)
def correct_neighbour(self,
method,
i_expected,
j_expected,
dz_expected,
vertical_bias=None,
land_constraint=False):
"""Test that the plugin returns the expected neighbour."""
plugin = Plugin(method, vertical_bias, land_constraint)
result = plugin.process(self.cube, self.sites, self.ancillary_data)
self.assertEqual(result['i'], i_expected)
self.assertEqual(result['j'], j_expected)
self.assertEqual(result['dz'], dz_expected)
def test_variable_no_neighbours(self):
"""
Test that the plugin can handle a variable number of neigbours to use
when relaxing the 'nearest' condition. Make the smallest displacement
point 2-grid cells away, so it should be captured with no_neighbours
set to 25.
"""
self.ancillary_data['orography'].data[13, 10] = 10.
plugin = Plugin(method='minimum_height_error_neighbour',
vertical_bias=None,
land_constraint=False)
result = plugin.process(self.cube,
self.sites,
self.ancillary_data,
no_neighbours=25)
self.assertEqual(result['i'], 13)
self.assertEqual(result['j'], 10)
self.assertEqual(result['dz'], 0.)
def return_types(self, method, vertical_bias=None, land_constraint=False):
"""Test that the plugin returns a numpy array."""
plugin = Plugin(method, vertical_bias, land_constraint)
result = plugin.process(self.cube, self.sites, self.ancillary_data)
self.assertIsInstance(result, np.ndarray)
self.assertEqual(result.dtype, self.neighbour_list.dtype)