class IcebergObj(LagrangianArray):
"""Extending LagrangianArray with variables relevant for iceberg objects.
"""
# We add the properties to the element class
variables = LagrangianArray.add_variables([
(
'wind_drift_factor',
{
'dtype': np.
float32, # The fraction of the wind speed at which an iceberg is moved
'unit': '%',
'default': 0.018
}),
(
'water_line_length',
{
'dtype': np.float32, # Iceberg size
'unit': 'm',
'default': 90.5
}),
(
'keel_depth',
{
'dtype': np.float32, # Iceberg keel depth
'unit': 'm',
'default': 60
})
])
def test_move(self):
A1 = LagrangianArray(lon=[4.1], lat=[60.1])
A2 = LagrangianArray(lon=[4.0, 4.5], lat=[60.0, 60.5])
A3 = LagrangianArray(lon=[1.0, 1.5, 1.7], lat=[60.0, 60.5, 61.0])
# Moving first and third element from A3 to A2
A3.move_elements(A2, np.array([True, False, True], dtype=bool))
self.assertEqual(len(A3), 1)
self.assertEqual(len(A2), 4)
A2.move_elements(A3, np.array([False, True, False, False], dtype=bool))
self.assertEqual(len(A2), 3)
self.assertEqual(len(A1), 1)
A1.move_elements(A3, np.array([True], dtype=bool))
self.assertEqual(len(A1), 0)
def test_fromarrays(self):
"""Make LagrangianArray from attribute arrays"""
lon = [4.0, 4.5, 5.0]
lat = 60.0
z = -10
A = LagrangianArray(lon=lon, lat=lat, z=z)
self.assertEqual(len(A), 3)
self.assertEqual(list(A.lon), [4.0, 4.5, 5.0])
def test_extend(self):
"""Test concatenation"""
e1 = LagrangianArray(lon=2, lat=60, z=[0, 1, 2])
e2 = LagrangianArray(lon=2, lat=61, z=-1)
e3 = LagrangianArray(lon=3, lat=61, z=0)
self.assertTrue(hasattr(e1.z, '__len__'))
self.assertFalse(hasattr(e2.z, '__len__'))
# Extend
e1.extend(e2)
e2.extend(e3)
# Check that identical scalars remain scalars, arrays are concatenated
self.assertTrue(hasattr(e1.z, '__len__'))
self.assertTrue(hasattr(e2.z, '__len__'))
self.assertItemsEqual(e1.z, [0, 1, 2, -1])
self.assertItemsEqual(e2.lon, [2., 3.])
self.assertEqual(e2.lat, 61.0)
self.assertEqual(len(e1), 4)
self.assertEqual(len(e2), 2)
self.assertEqual(len(e3), 1)
def test_extend(self):
"""Test concatenation"""
e1 = LagrangianArray(lon=2, lat=60, z=[0, 1, 2])
e2 = LagrangianArray(lon=2, lat=61, z=-1)
e3 = LagrangianArray(lon=3, lat=61, z=0)
self.assertTrue(hasattr(e1.z, "__len__"))
self.assertFalse(hasattr(e2.z, "__len__"))
# Extend
e1.extend(e2)
e2.extend(e3)
# Check that identical scalars remain scalars, arrays are concatenated
self.assertTrue(hasattr(e1.z, "__len__"))
self.assertTrue(hasattr(e2.z, "__len__"))
self.assertItemsEqual(e1.z, [0, 1, 2, -1])
self.assertItemsEqual(e2.lon, [2.0, 3.0])
self.assertEqual(e2.lat, 61.0)
self.assertEqual(len(e1), 4)
self.assertEqual(len(e2), 2)
self.assertEqual(len(e3), 1)
def test_move(self):
A1 = LagrangianArray(lon = [4.1], lat = [60.1])
A2 = LagrangianArray(lon = [4.0, 4.5], lat = [60.0, 60.5])
A3 = LagrangianArray(lon = [1.0, 1.5, 1.7], lat = [60.0, 60.5, 61.0])
# Moving first and third element from A3 to A2
A3.move_elements(A2, np.array([True, False, True], dtype=bool))
self.assertEqual(len(A3), 1)
self.assertEqual(len(A2), 4)
A2.move_elements(A3, np.array([False, True, False, False], dtype=bool))
self.assertEqual(len(A2), 3)
self.assertEqual(len(A1), 1)
A1.move_elements(A3, np.array([True], dtype=bool))
self.assertEqual(len(A1), 0)
def test_empty(self):
"""Empty LagrangianArray works as expected"""
A0 = LagrangianArray()
self.assertEqual(len(A0), 0)
self.assertFalse(A0)
self.assertFalse(A0.lon)
def test_init(self):
"""Chcek that init works"""
A = LagrangianArray(lon=4.0, lat=60.0)
self.assertEqual(len(A), 1)
