/
test_kernel_execution.py
286 lines (232 loc) · 10.1 KB
/
test_kernel_execution.py
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from os import path
from parcels import (
FieldSet, ParticleSet, ScipyParticle, JITParticle, StateCode, OperationCode, ErrorCode, KernelError,
OutOfBoundsError, AdvectionRK4
)
import numpy as np
import pytest
import sys
ptype = {'scipy': ScipyParticle, 'jit': JITParticle}
def DoNothing(particle, fieldset, time):
return StateCode.Success
def fieldset(xdim=20, ydim=20):
""" Standard unit mesh fieldset """
lon = np.linspace(0., 1., xdim, dtype=np.float32)
lat = np.linspace(0., 1., ydim, dtype=np.float32)
U, V = np.meshgrid(lat, lon)
data = {'U': np.array(U, dtype=np.float32), 'V': np.array(V, dtype=np.float32)}
dimensions = {'lat': lat, 'lon': lon}
return FieldSet.from_data(data, dimensions, mesh='flat')
@pytest.fixture(name="fieldset")
def fieldset_fixture(xdim=20, ydim=20):
return fieldset(xdim=xdim, ydim=ydim)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('start, end, substeps, dt', [
(0., 10., 1, 1.),
(0., 10., 4, 1.),
(0., 10., 1, 3.),
(2., 16., 5, 3.),
(20., 10., 4, -1.),
(20., -10., 7, -2.),
])
def test_execution_endtime(fieldset, mode, start, end, substeps, dt, npart=10):
pset = ParticleSet(fieldset, pclass=ptype[mode], time=start,
lon=np.linspace(0, 1, npart),
lat=np.linspace(1, 0, npart))
pset.execute(DoNothing, endtime=end, dt=dt)
assert np.allclose(pset.time, end)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('start, end, substeps, dt', [
(0., 10., 1, 1.),
(0., 10., 4, 1.),
(0., 10., 1, 3.),
(2., 16., 5, 3.),
(20., 10., 4, -1.),
(20., -10., 7, -2.),
])
def test_execution_runtime(fieldset, mode, start, end, substeps, dt, npart=10):
pset = ParticleSet(fieldset, pclass=ptype[mode], time=start,
lon=np.linspace(0, 1, npart),
lat=np.linspace(1, 0, npart))
t_step = abs(end - start) / substeps
for _ in range(substeps):
pset.execute(DoNothing, runtime=t_step, dt=dt)
assert np.allclose(pset.time, end)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('time', [0., 1])
@pytest.mark.parametrize('dt', [0., 1])
def test_pset_execute_dt_0(fieldset, mode, time, dt, npart=2):
def SetLat(particle, fieldset, time):
particle.lat = .6
lon = np.linspace(0, 1, npart)
lat = np.linspace(1, 0, npart)
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=lon, lat=lat)
pset.execute(SetLat, endtime=time, dt=dt)
assert np.allclose(pset.lon, lon)
assert np.allclose(pset.lat, [.6])
assert np.allclose(pset.time, min([time, dt]))
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=lon, lat=lat)
pset.execute(SetLat, runtime=time, dt=dt)
assert np.allclose(pset.lon, lon)
assert np.allclose(pset.lat, [.6])
assert np.allclose(pset.time, min([time, dt]))
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_execution_fail_timed(fieldset, mode, npart=10):
def TimedFail(particle, fieldset, time):
if particle.time >= 10.:
return ErrorCode.Error
else:
return StateCode.Success
pset = ParticleSet(fieldset, pclass=ptype[mode],
lon=np.linspace(0, 1, npart),
lat=np.linspace(1, 0, npart))
error_thrown = False
try:
pset.execute(TimedFail, endtime=20., dt=2.)
except KernelError:
error_thrown = True
assert error_thrown
assert len(pset) == npart
assert np.allclose(pset.time, 10.)
@pytest.mark.parametrize('mode', ['scipy'])
def test_execution_fail_python_exception(fieldset, mode, npart=10):
def PythonFail(particle, fieldset, time):
if particle.time >= 10.:
raise RuntimeError("Enough is enough!")
else:
return StateCode.Success
pset = ParticleSet(fieldset, pclass=ptype[mode],
lon=np.linspace(0, 1, npart),
lat=np.linspace(1, 0, npart))
error_thrown = False
try:
pset.execute(PythonFail, endtime=20., dt=2.)
except KernelError:
error_thrown = True
assert error_thrown
assert len(pset) == npart
assert np.allclose(pset.time, 10.)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_execution_fail_out_of_bounds(fieldset, mode, npart=10):
def MoveRight(particle, fieldset, time):
fieldset.U[time, particle.depth, particle.lat, particle.lon + 0.1]
particle.lon += 0.1
pset = ParticleSet(fieldset, pclass=ptype[mode],
lon=np.linspace(0, 1, npart),
lat=np.linspace(1, 0, npart))
error_thrown = False
try:
pset.execute(MoveRight, endtime=10., dt=1.)
except OutOfBoundsError:
error_thrown = True
assert error_thrown
assert len(pset) == npart
assert (pset.lon - 1. > -1.e12).all()
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_execution_recover_out_of_bounds(fieldset, mode, npart=2):
def MoveRight(particle, fieldset, time):
fieldset.U[time, particle.depth, particle.lat, particle.lon + 0.1]
particle.lon += 0.1
def MoveLeft(particle, fieldset, time):
particle.lon -= 1.
lon = np.linspace(0.05, 0.95, npart)
lat = np.linspace(1, 0, npart)
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=lon, lat=lat)
pset.execute(MoveRight, endtime=10., dt=1.,
recovery={ErrorCode.ErrorOutOfBounds: MoveLeft})
assert len(pset) == npart
assert np.allclose(pset.lon, lon, rtol=1e-5)
assert np.allclose(pset.lat, lat, rtol=1e-5)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_execution_delete_out_of_bounds(fieldset, mode, npart=10):
def MoveRight(particle, fieldset, time):
fieldset.U[time, particle.depth, particle.lat, particle.lon + 0.1]
particle.lon += 0.1
def DeleteMe(particle, fieldset, time):
particle.delete()
lon = np.linspace(0.05, 0.95, npart)
lat = np.linspace(1, 0, npart)
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=lon, lat=lat)
pset.execute(MoveRight, endtime=10., dt=1.,
recovery={ErrorCode.ErrorOutOfBounds: DeleteMe})
assert len(pset) == 0
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_kernel_add_no_new_variables(fieldset, mode):
def MoveEast(particle, fieldset, time):
particle.lon += 0.1
def MoveNorth(particle, fieldset, time):
particle.lat += 0.1
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=[0.5], lat=[0.5])
pset.execute(pset.Kernel(MoveEast) + pset.Kernel(MoveNorth),
endtime=1., dt=1.)
assert np.allclose(pset.lon, 0.6, rtol=1e-5)
assert np.allclose(pset.lat, 0.6, rtol=1e-5)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_multi_kernel_duplicate_varnames(fieldset, mode):
# Testing for merging of two Kernels with the same variable declared
# Should throw a warning, but go ahead regardless
def MoveEast(particle, fieldset, time):
add_lon = 0.1
particle.lon += add_lon
def MoveWest(particle, fieldset, time):
add_lon = -0.3
particle.lon += add_lon
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=[0.5], lat=[0.5])
pset.execute(pset.Kernel(MoveEast) + pset.Kernel(MoveWest),
endtime=1., dt=1.)
assert np.allclose(pset.lon, 0.3, rtol=1e-5)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_multi_kernel_reuse_varnames(fieldset, mode):
# Testing for merging of two Kernels with the same variable declared
# Should throw a warning, but go ahead regardless
def MoveEast1(particle, fieldset, time):
add_lon = 0.2
particle.lon += add_lon
def MoveEast2(particle, fieldset, time):
particle.lon += add_lon # NOQA - no flake8 testing of this line
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=[0.5], lat=[0.5])
pset.execute(pset.Kernel(MoveEast1) + pset.Kernel(MoveEast2),
endtime=1., dt=1.)
assert np.allclose(pset.lon, [0.9], rtol=1e-5) # should be 0.5 + 0.2 + 0.2 = 0.9
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_update_kernel_in_script(fieldset, mode):
# Testing what happens when kernels are updated during runtime of a script
# Should throw a warning, but go ahead regardless
def MoveEast(particle, fieldset, time):
add_lon = 0.1
particle.lon += add_lon
def MoveWest(particle, fieldset, time):
add_lon = -0.3
particle.lon += add_lon
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=[0.5], lat=[0.5])
pset.execute(pset.Kernel(MoveEast), endtime=1., dt=1.)
pset.execute(pset.Kernel(MoveWest), endtime=2., dt=1.)
assert np.allclose(pset.lon, 0.3, rtol=1e-5) # should be 0.5 + 0.1 - 0.3 = 0.3
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_statuscode_repeat(fieldset, mode):
def simpleKernel(particle, fieldset, time):
if particle.lon > .1 and time < 1.:
# if particle.lon is not re-setted before kernel repetition, it will break here
return ErrorCode.Error
particle.lon += 0.1
if particle.dt > 1.49:
# dt is used to leave the repetition loop (dt is the only variable not re-setted)
return StateCode.Success
particle.dt += .1
return OperationCode.Repeat
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=[0.], lat=[0.])
pset.execute(pset.Kernel(simpleKernel), endtime=3., dt=1.)
@pytest.mark.parametrize('delete_cfiles', [True, False])
@pytest.mark.skipif(sys.platform.startswith("win"), reason="skipping windows test as windows compiler generates warning")
def test_execution_keep_cfiles_and_nocompilation_warnings(fieldset, delete_cfiles):
pset = ParticleSet(fieldset, pclass=JITParticle, lon=[0.], lat=[0.])
pset.execute(pset.Kernel(AdvectionRK4, delete_cfiles=delete_cfiles), endtime=1., dt=1.)
cfile = pset.kernel.src_file
logfile = pset.kernel.log_file
del pset.kernel
if delete_cfiles:
assert not path.exists(cfile)
else:
assert path.exists(cfile)
with open(logfile) as f:
assert 'warning' not in f.read(), 'Compilation WARNING in log file'