/
test_kernel_language.py
477 lines (386 loc) · 17.2 KB
/
test_kernel_language.py
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from parcels import FieldSet, ParticleSet, ScipyParticle, JITParticle, Kernel, Variable, StateCode
from parcels.kernels.TEOSseawaterdensity import PolyTEOS10_bsq
from parcels.kernels.EOSseawaterproperties import PressureFromLatDepth, PtempFromTemp, TempFromPtemp, UNESCODensity
from parcels import ParcelsRandom
import numpy as np
import pytest
import random as py_random
from os import path
import sys
ptype = {'scipy': ScipyParticle, 'jit': JITParticle}
def expr_kernel(name, pset, expr):
pycode = """def %s(particle, fieldset, time):
particle.p = %s""" % (name, expr)
return Kernel(pset.fieldset, pset.ptype, pyfunc=None,
funccode=pycode, funcname=name,
funcvars=['particle'])
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', transpose=True)
@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('name, expr, result', [
('Add', '2 + 5', 7),
('Sub', '6 - 2', 4),
('Mul', '3 * 5', 15),
('Div', '24 / 4', 6),
])
def test_expression_int(mode, name, expr, result, npart=10):
""" Test basic arithmetic expressions """
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32)
pset = ParticleSet(None, pclass=TestParticle,
lon=np.linspace(0., 1., npart),
lat=np.zeros(npart) + 0.5)
pset.execute(expr_kernel('Test%s' % name, pset, expr), endtime=1., dt=1.)
assert(np.all(result == pset.p))
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('name, expr, result', [
('Add', '2. + 5.', 7),
('Sub', '6. - 2.', 4),
('Mul', '3. * 5.', 15),
('Div', '24. / 4.', 6),
('Pow', '2 ** 3', 8),
])
def test_expression_float(mode, name, expr, result, npart=10):
""" Test basic arithmetic expressions """
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32)
pset = ParticleSet(None, pclass=TestParticle,
lon=np.linspace(0., 1., npart),
lat=np.zeros(npart) + 0.5)
pset.execute(expr_kernel('Test%s' % name, pset, expr), endtime=1., dt=1.)
assert(np.all(result == pset.p))
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('name, expr, result', [
('True', 'True', True),
('False', 'False', False),
('And', 'True and False', False),
('Or', 'True or False', True),
('Equal', '5 == 5', True),
('NotEqual', '3 != 4', True),
('Lesser', '5 < 3', False),
('LesserEq', '3 <= 5', True),
('Greater', '4 > 2', True),
('GreaterEq', '2 >= 4', False),
('CheckNaN', 'math.nan != math.nan', True),
])
def test_expression_bool(mode, name, expr, result, npart=10):
""" Test basic arithmetic expressions """
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32)
pset = ParticleSet(None, pclass=TestParticle,
lon=np.linspace(0., 1., npart),
lat=np.zeros(npart) + 0.5)
pset.execute(expr_kernel('Test%s' % name, pset, expr), endtime=1., dt=1.)
if mode == 'jit':
assert(np.all(result == (pset.p == 1)))
else:
assert(np.all(result == pset.p))
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_while_if_break(mode):
"""Test while, if and break commands"""
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32, initial=0.)
pset = ParticleSet(pclass=TestParticle, lon=[0], lat=[0])
def kernel(particle, fieldset, time):
while particle.p < 30:
if particle.p > 9:
break
particle.p += 1
if particle.p > 5:
particle.p *= 2.
pset.execute(kernel, endtime=1., dt=1.)
assert np.allclose(pset.p, 20., rtol=1e-12)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_nested_if(mode):
"""Test nested if commands"""
class TestParticle(ptype[mode]):
p0 = Variable('p0', dtype=np.int32, initial=0)
p1 = Variable('p1', dtype=np.int32, initial=1)
pset = ParticleSet(pclass=TestParticle, lon=0, lat=0)
def kernel(particle, fieldset, time):
if particle.p1 >= particle.p0:
var = particle.p0
if var + 1 < particle.p1:
particle.p1 = -1
pset.execute(kernel, endtime=10, dt=1.)
assert np.allclose([pset.p0[0], pset.p1[0]], [0, 1])
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_pass(mode):
"""Test pass commands"""
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.int32, initial=0)
pset = ParticleSet(pclass=TestParticle, lon=0, lat=0)
def kernel(particle, fieldset, time):
particle.p = -1
pass
pset.execute(kernel, endtime=10, dt=1.)
assert np.allclose(pset[0].p, -1)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_dt_as_variable_in_kernel(mode):
pset = ParticleSet(pclass=ptype[mode], lon=0, lat=0)
def kernel(particle, fieldset, time):
dt = 1. # noqa
pset.execute(kernel, endtime=10, dt=1.)
def test_parcels_tmpvar_in_kernel():
"""Tests for error thrown if variable with 'tmp' defined in custom kernel"""
error_thrown = False
pset = ParticleSet(pclass=JITParticle, lon=0, lat=0)
def kernel_tmpvar(particle, fieldset, time):
parcels_tmpvar0 = 0 # noqa
def kernel_pnum(particle, fieldset, time):
pnum = 0 # noqa
for kernel in [kernel_tmpvar, kernel_pnum]:
try:
pset.execute(kernel, endtime=1, dt=1.)
except NotImplementedError:
error_thrown = True
assert error_thrown
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_if_withfield(fieldset, mode):
"""Test combination of if and Field sampling commands"""
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32, initial=0.)
pset = ParticleSet(fieldset, pclass=TestParticle, lon=[0], lat=[0])
def kernel(particle, fieldset, time):
u = fieldset.U[time, 0, 0, 1.]
particle.p = 0
if fieldset.U[time, 0, 0, 1.] == u:
particle.p += 1
if fieldset.U[time, 0, 0, 1.] == fieldset.U[time, 0, 0, 1.]:
particle.p += 1
if True:
particle.p += 1
if fieldset.U[time, 0, 0, 1.] == u and 1 == 1:
particle.p += 1
if fieldset.U[time, 0, 0, 1.] == fieldset.U[time, 0, 0, 1.] and fieldset.U[time, 0, 0, 1.] == fieldset.U[time, 0, 0, 1.]:
particle.p += 1
if fieldset.U[time, 0, 0, 1.] == u:
particle.p += 1
else:
particle.p += 1000
if fieldset.U[time, 0, 0, 1.] == 3:
particle.p += 1000
else:
particle.p += 1
pset.execute(kernel, endtime=1., dt=1.)
assert np.allclose(pset.p, 7., rtol=1e-12)
@pytest.mark.parametrize(
'mode',
['scipy',
pytest.param('jit',
marks=pytest.mark.xfail(
(sys.version_info >= (3, 0)) or (sys.platform == 'win32'),
reason="py.test FD capturing does not work for jit on python3 or Win"))
])
def test_print(fieldset, mode, capfd):
"""Test print statements"""
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32, initial=0.)
pset = ParticleSet(fieldset, pclass=TestParticle, lon=[0.5], lat=[0.5])
def kernel(particle, fieldset, time):
particle.p = fieldset.U[time, particle.depth, particle.lat, particle.lon]
tmp = 5
print("%d %f %f" % (particle.id, particle.p, tmp))
pset.execute(kernel, endtime=1., dt=1.)
out, err = capfd.readouterr()
lst = out.split(' ')
tol = 1e-8
assert abs(float(lst[0]) - pset.id[0]) < tol and abs(float(lst[1]) - pset.p[0]) < tol and abs(float(lst[2]) - 5) < tol
def kernel2(particle, fieldset, time):
tmp = 3
print("%f" % (tmp))
pset.execute(kernel2, endtime=1., dt=1.)
out, err = capfd.readouterr()
lst = out.split(' ')
assert abs(float(lst[0]) - 3) < tol
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_fieldset_access(fieldset, mode):
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=0, lat=0)
def kernel(particle, fieldset, time):
particle.lon = fieldset.U.grid.lon[2]
error_thrown = False
try:
pset.execute(kernel, endtime=1, dt=1.)
except NotImplementedError:
error_thrown = True
if mode == 'jit':
assert error_thrown
else:
assert pset.lon[0] == fieldset.U.grid.lon[2]
def random_series(npart, rngfunc, rngargs, mode):
random = ParcelsRandom if mode == 'jit' else py_random
random.seed(1234)
func = getattr(random, rngfunc)
series = [func(*rngargs) for _ in range(npart)]
random.seed(1234) # Reset the RNG seed
return series
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('rngfunc, rngargs', [
('random', []),
('uniform', [0., 20.]),
('randint', [0, 20]),
])
def test_random_float(mode, rngfunc, rngargs, npart=10):
""" Test basic random number generation """
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32 if rngfunc == 'randint' else np.float32)
pset = ParticleSet(pclass=TestParticle,
lon=np.linspace(0., 1., npart),
lat=np.zeros(npart) + 0.5)
series = random_series(npart, rngfunc, rngargs, mode)
rnglib = 'ParcelsRandom' if mode == 'jit' else 'random'
kernel = expr_kernel('TestRandom_%s' % rngfunc, pset,
'%s.%s(%s)' % (rnglib, rngfunc, ', '.join([str(a) for a in rngargs])))
pset.execute(kernel, endtime=1., dt=1.)
assert np.allclose(pset.p, series, atol=1e-9)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('concat', [False, True])
def test_random_kernel_concat(fieldset, mode, concat):
class TestParticle(ptype[mode]):
p = Variable('p', dtype=np.float32)
pset = ParticleSet(fieldset, pclass=TestParticle, lon=0, lat=0)
def RandomKernel(particle, fieldset, time):
particle.p += ParcelsRandom.uniform(0, 1)
def AddOne(particle, fieldset, time):
particle.p += 1.
kernels = pset.Kernel(RandomKernel)+pset.Kernel(AddOne) if concat else RandomKernel
pset.execute(kernels, dt=0)
assert pset.p > 1 if concat else pset.p < 1
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('c_inc', ['str', 'file'])
def test_c_kernel(fieldset, mode, c_inc):
coord_type = np.float32 if c_inc == 'str' else np.float64
pset = ParticleSet(fieldset, pclass=ptype[mode], lon=[0.5], lat=[0],
lonlatdepth_dtype=coord_type)
def func(U, lon, dt):
u = U.data[0, 2, 1]
return lon + u * dt
if c_inc == 'str':
c_include = """
static inline StatusCode func(CField *f, float *lon, double *dt)
{
float data2D[2][2][2];
StatusCode status = getCell2D(f, 1, 2, 0, data2D, 1); CHECKSTATUS(status);
float u = data2D[0][0][0];
*lon += u * *dt;
return SUCCESS;
}
"""
else:
c_include = path.join(path.dirname(__file__), 'customed_header.h')
def ckernel(particle, fieldset, time):
func('parcels_customed_Cfunc_pointer_args', fieldset.U, particle.lon, particle.dt)
def pykernel(particle, fieldset, time):
particle.lon = func(fieldset.U, particle.lon, particle.dt)
if mode == 'scipy':
kernel = pset.Kernel(pykernel)
else:
kernel = pset.Kernel(ckernel, c_include=c_include)
pset.execute(kernel, endtime=3., dt=3.)
assert np.allclose(pset.lon[0], 0.81578948)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_dt_modif_by_kernel(mode):
class TestParticle(ptype[mode]):
age = Variable('age', dtype=np.float32)
pset = ParticleSet(pclass=TestParticle, lon=[0.5], lat=[0])
def modif_dt(particle, fieldset, time):
particle.age += particle.dt
particle.dt = 2
endtime = 4
pset.execute(modif_dt, endtime=endtime, dt=1.)
assert np.isclose(pset.time[0], endtime)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('dt', [1e-2, 1e-6])
def test_small_dt(mode, dt, npart=10):
pset = ParticleSet(pclass=ptype[mode], lon=np.zeros(npart),
lat=np.zeros(npart), time=np.arange(0, npart)*dt*10)
def DoNothing(particle, fieldset, time):
return StateCode.Success
pset.execute(DoNothing, dt=dt, runtime=dt*100)
assert np.allclose([p.time for p in pset], dt*100)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_TEOSdensity_kernels(mode):
def generate_fieldset(xdim=2, ydim=2, zdim=2, tdim=1):
lon = np.linspace(0., 10., xdim, dtype=np.float32)
lat = np.linspace(0., 10., ydim, dtype=np.float32)
depth = np.linspace(0, 2000, zdim, dtype=np.float32)
time = np.zeros(tdim, dtype=np.float64)
U = np.ones((tdim, zdim, ydim, xdim))
V = np.ones((tdim, zdim, ydim, xdim))
abs_salinity = 30 * np.ones((tdim, zdim, ydim, xdim))
cons_temperature = 10 * np.ones((tdim, zdim, ydim, xdim))
dimensions = {'lat': lat, 'lon': lon, 'depth': depth, 'time': time}
data = {'U': np.array(U, dtype=np.float32), 'V': np.array(V, dtype=np.float32),
'abs_salinity': np.array(abs_salinity, dtype=np.float32),
'cons_temperature': np.array(cons_temperature, dtype=np.float32)}
return (data, dimensions)
data, dimensions = generate_fieldset()
fieldset = FieldSet.from_data(data, dimensions)
class DensParticle(ptype[mode]):
density = Variable('density', dtype=np.float32)
pset = ParticleSet(fieldset, pclass=DensParticle, lon=5, lat=5, depth=1000)
pset.execute(PolyTEOS10_bsq, runtime=0, dt=0)
assert np.allclose(pset[0].density, 1022.85377)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
def test_EOSseawaterproperties_kernels(mode):
fieldset = FieldSet.from_data(data={'U': 0, 'V': 0,
'psu_salinity': 40,
'temperature': 40,
'potemperature': 36.89073},
dimensions={'lat': 0, 'lon': 0, 'depth': 0})
fieldset.add_constant('refpressure', np.float(0))
class PoTempParticle(ptype[mode]):
potemp = Variable('potemp', dtype=np.float32)
pressure = Variable('pressure', dtype=np.float32, initial=10000)
pset = ParticleSet(fieldset, pclass=PoTempParticle, lon=5, lat=5, depth=1000)
pset.execute(PtempFromTemp, runtime=0, dt=0)
assert np.allclose(pset[0].potemp, 36.89073)
class TempParticle(ptype[mode]):
temp = Variable('temp', dtype=np.float32)
pressure = Variable('pressure', dtype=np.float32, initial=10000)
pset = ParticleSet(fieldset, pclass=TempParticle, lon=5, lat=5, depth=1000)
pset.execute(TempFromPtemp, runtime=0, dt=0)
assert np.allclose(pset[0].temp, 40)
class TPressureParticle(ptype[mode]):
pressure = Variable('pressure', dtype=np.float32)
pset = ParticleSet(fieldset, pclass=TempParticle, lon=5, lat=30, depth=7321.45)
pset.execute(PressureFromLatDepth, runtime=0, dt=0)
assert np.allclose(pset[0].pressure, 7500, atol=1e-2)
@pytest.mark.parametrize('mode', ['scipy', 'jit'])
@pytest.mark.parametrize('pressure', [0, 10])
def test_UNESCOdensity_kernel(mode, pressure):
def generate_fieldset(p, xdim=2, ydim=2, zdim=2, tdim=1):
lon = np.linspace(0., 10., xdim, dtype=np.float32)
lat = np.linspace(0., 10., ydim, dtype=np.float32)
depth = np.linspace(0, 2000, zdim, dtype=np.float32)
time = np.zeros(tdim, dtype=np.float64)
U = np.ones((tdim, zdim, ydim, xdim))
V = np.ones((tdim, zdim, ydim, xdim))
psu_salinity = 8 * np.ones((tdim, zdim, ydim, xdim))
cons_temperature = 10 * np.ones((tdim, zdim, ydim, xdim))
cons_pressure = p * np.ones((tdim, zdim, ydim, xdim))
dimensions = {'lat': lat, 'lon': lon, 'depth': depth, 'time': time}
data = {'U': np.array(U, dtype=np.float32), 'V': np.array(V, dtype=np.float32),
'psu_salinity': np.array(psu_salinity, dtype=np.float32),
'cons_pressure': np.array(cons_pressure, dtype=np.float32),
'cons_temperature': np.array(cons_temperature, dtype=np.float32)}
return (data, dimensions)
data, dimensions = generate_fieldset(pressure)
fieldset = FieldSet.from_data(data, dimensions)
class DensParticle(ptype[mode]):
density = Variable('density', dtype=np.float32)
pset = ParticleSet(fieldset, pclass=DensParticle, lon=5, lat=5, depth=1000)
pset.execute(UNESCODensity, runtime=0, dt=0)
if(pressure == 0):
assert np.allclose(pset[0].density, 1005.9465)
elif(pressure == 10):
assert np.allclose(pset[0].density, 1006.4179)