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'''
Unit tests for CurvRectRegridder
@author: Karl Smith
'''
from __future__ import print_function
import unittest
import numpy
import ESMP
from .esmpcontrol import ESMPControl
from .regrid2d import CurvRectRegridder
from past.builtins import xrange
class CurvRectRegridderTests(unittest.TestCase):
'''
Unit tests for the CurvRectRegridder class
'''
# flag to indicate when to call ESMPControl().stopESMP()
last_test = False
def setUp(self):
'''
Create some repeatedly used test data.
'''
# Use tuples for the arrays to make sure the NumPy
# arrays created in the class methods are always used;
# not arrays that happened to be passed as input.
# Also verifies passed data is not modified.
# Rectilinear coordinates, data. and flags
crn_lons = numpy.linspace(-110, -90, 11)
crn_lats = numpy.linspace(0, 32, 9)
ctr_lons = 0.5 * (crn_lons[:-1] + crn_lons[1:])
ctr_lats = 0.5 * (crn_lats[:-1] + crn_lats[1:])
ctr_lats_mat, ctr_lons_mat = numpy.meshgrid(ctr_lats, ctr_lons)
data = -2.0 * numpy.sin(numpy.deg2rad(ctr_lons_mat)) \
* numpy.cos(numpy.deg2rad(ctr_lats_mat))
ctr_flags = numpy.zeros(data.shape, dtype=numpy.int32)
ctr_flags[:2, :2] = 1
crn_flags = numpy.zeros((crn_lons.shape[0], crn_lats.shape[0]), dtype=numpy.int32)
crn_flags[:2, :2] = 1
# Turn rectilinear arrays into tuples
self.rect_corner_lons = tuple(crn_lons)
self.rect_corner_lats = tuple(crn_lats)
self.rect_center_lons = tuple(ctr_lons)
self.rect_center_lats = tuple(ctr_lats)
self.rect_center_ignr = tuple([tuple(subarr) for subarr in ctr_flags.tolist()])
self.rect_corner_ignr = tuple([tuple(subarr) for subarr in crn_flags.tolist()])
self.rect_data = tuple([tuple(subarr) for subarr in data.tolist()])
# Curvilinear coordindates - one step further out on all sides of the region
crn_lons = numpy.linspace(-112, -88, 13)
crn_lats = numpy.linspace(-4, 36, 11)
crn_lats_mat, crn_lons_mat = numpy.meshgrid(crn_lats, crn_lons)
ctr_lons = 0.5 * (crn_lons[:-1] + crn_lons[1:])
ctr_lats = 0.5 * (crn_lats[:-1] + crn_lats[1:])
ctr_lats_mat, ctr_lons_mat = numpy.meshgrid(ctr_lats, ctr_lons)
# Pull coordinates in some towards the center
crn_lons = crn_lons_mat * numpy.cos(numpy.deg2rad(crn_lats_mat - 16.0) / 2.0)
crn_lats = crn_lats_mat * numpy.cos(numpy.deg2rad(crn_lons_mat + 100.0) / 2.0)
ctr_lons = ctr_lons_mat * numpy.cos(numpy.deg2rad(ctr_lats_mat - 16.0) / 2.0)
ctr_lats = ctr_lats_mat * numpy.cos(numpy.deg2rad(ctr_lons_mat + 100.0) / 2.0)
# Curvilinear data and flags
data = -2.0 * numpy.sin(numpy.deg2rad(ctr_lons)) \
* numpy.cos(numpy.deg2rad(ctr_lats))
ctr_flags = numpy.zeros(data.shape, dtype=numpy.int32)
ctr_flags[:3, :3] = 1
crn_flags = numpy.zeros(crn_lons.shape, dtype=numpy.int32)
crn_flags[:3, :3] = 1
# Turn curvilinear arrays into tuples
self.curv_corner_lons = tuple([tuple(subarr) for subarr in crn_lons.tolist()])
self.curv_corner_lats = tuple([tuple(subarr) for subarr in crn_lats.tolist()])
self.curv_center_lons = tuple([tuple(subarr) for subarr in ctr_lons.tolist()])
self.curv_center_lats = tuple([tuple(subarr) for subarr in ctr_lats.tolist()])
self.curv_center_ignr = tuple([tuple(subarr) for subarr in ctr_flags.tolist()])
self.curv_corner_ignr = tuple([tuple(subarr) for subarr in crn_flags.tolist()])
self.curv_data = tuple([tuple(subarr) for subarr in data.tolist()])
# undef_val must be a numpy array
self.undef_val = numpy.array([1.0E10], dtype=numpy.float64)
if not ESMPControl().startCheckESMP():
self.fail("startCheckESMP did not succeed - test called after last_test set to True")
def test01CurvRectRegridderInit(self):
'''
Test of the CurvRectRegridder.__init__ method.
'''
regridder = CurvRectRegridder()
self.assertTrue(regridder != None, "CurvRectRegridder() returned None")
regridder.finalize()
def test02CreateCurvGrid(self):
'''
Tests the CurvRectRegridder.createCurvGrid method.
Since nothing is returned from this method, just
checks for unexpected/expected Errors being raised.
'''
regridder = CurvRectRegridder()
# Test with all corner and center data
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
self.curv_center_ignr, self.curv_corner_lons,
self.curv_corner_lats, self.curv_corner_ignr)
# Test without flags
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
None, self.curv_corner_lons, self.curv_corner_lats)
# Test without corners
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
self.curv_center_ignr)
# Test without corners or flags
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats)
# TODO: Test invalid cases
# Done with this regridder
regridder.finalize()
def test03AssignCurvField(self):
'''
Tests the CurvRectRegridder.assignCurvGrid method.
Since nothing is returned from this method, just
checks for unexpected/expected Errors being raised.
'''
regridder = CurvRectRegridder()
# Test with all corner and center data
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
self.curv_center_ignr, self.curv_corner_lons,
self.curv_corner_lats, self.curv_corner_ignr)
regridder.assignCurvField()
regridder.assignCurvField(self.curv_data)
# Test without flags
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
None, self.curv_corner_lons, self.curv_corner_lats)
regridder.assignCurvField(self.curv_data)
regridder.assignCurvField()
# Test without corners
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
self.curv_center_ignr)
regridder.assignCurvField(self.curv_data)
regridder.assignCurvField()
# Test without corners or flags
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats)
regridder.assignCurvField()
regridder.assignCurvField(self.curv_data)
# TODO: Test invalid cases
# Done with this regridder
regridder.finalize()
def test04CreateRectGrid(self):
'''
Tests the CurvRectRegridder.createRectGrid method.
Since nothing is returned from this method, just
checks for unexpected/expected Errors being raised.
'''
regridder = CurvRectRegridder()
# Test with all corner and center data
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
self.rect_center_ignr, self.rect_corner_lons,
self.rect_corner_lats, self.rect_corner_ignr)
# Test without flags
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
None, self.rect_corner_lons, self.rect_corner_lats)
# Test without corners
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
self.rect_center_ignr)
# Test without corners or flags
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats)
# TODO: Test invalid cases
# Done with this regridder
regridder.finalize()
def test05AssignRectField(self):
'''
Tests the CurvRectRegridder.assignRectGrid method.
Since nothing is returned from this method, just
checks for unexpected/expected Errors being raised.
'''
regridder = CurvRectRegridder()
# Test with all corner and center data
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
self.rect_center_ignr, self.rect_corner_lons,
self.rect_corner_lats, self.rect_corner_ignr)
regridder.assignRectField(self.rect_data)
regridder.assignRectField()
# Test without flags
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
None, self.rect_corner_lons, self.rect_corner_lats)
regridder.assignRectField()
regridder.assignRectField(self.rect_data)
# Test without corners
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
self.rect_center_ignr)
regridder.assignRectField()
regridder.assignRectField(self.rect_data)
# Test without corners or flags
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats)
regridder.assignRectField(self.rect_data)
regridder.assignRectField()
# TODO: Test invalid cases
# Done with this regridder
regridder.finalize()
def test06RegridCurvToRectConserve(self):
'''
Tests the CurvRectRegridder.regridCurvToRect method using conservative regridding
'''
regridder = CurvRectRegridder()
# Test with all corner and center data, using conservative regridding
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
self.curv_center_ignr, self.curv_corner_lons,
self.curv_corner_lats, self.curv_corner_ignr)
regridder.assignCurvField(self.curv_data)
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
self.rect_center_ignr, self.rect_corner_lons,
self.rect_corner_lats, self.rect_corner_ignr)
regridder.assignRectField()
regrid_data = regridder.regridCurvToRect(self.undef_val,
ESMP.ESMP_REGRIDMETHOD_CONSERVE)
expect_data = numpy.array(self.rect_data, dtype=numpy.float64)
undef_flags = numpy.array(self.rect_center_ignr, dtype=numpy.bool)
expect_data[undef_flags] = self.undef_val
mismatch_found = False
# Couple "good" points next to ignored data area are a bit wonky
expect_data[2, 0] = self.undef_val
regrid_data[2, 0] = self.undef_val
expect_data[2, 1] = self.undef_val
regrid_data[2, 1] = self.undef_val
for i in xrange(expect_data.shape[0]):
for j in xrange(expect_data.shape[1]):
if numpy.abs(expect_data[i, j] - regrid_data[i, j]) > 0.0007:
mismat
ch_found = True
print ("expect = %#6.4f, found = %#6.4f for lon = %5.1f, " \
"lat = %5.1f" % (expect_data[i, j], regrid_data[i, j],
self.rect_center_lons[i], self.rect_center_lats[j]))
if mismatch_found:
self.fail("data mismatch found")
def test07RegridCurvToRectBilinear(self):
'''
Tests the CurvRectRegridder.regridCurvToRect method using bilinear regridding
'''
regridder = CurvRectRegridder()
# Test with only center data and no flags, using bilinear regridding
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats)
regridder.assignCurvField(self.curv_data)
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats)
regridder.assignRectField()
regrid_data = regridder.regridCurvToRect(self.undef_val,
ESMP.ESMP_REGRIDMETHOD_BILINEAR)
expect_data = numpy.array(self.rect_data, dtype=numpy.float64)
mismatch_found = False
# one point falls outside the curvilinear centerpoints grid?
expect_data[5, 0] = self.undef_val
for i in xrange(expect_data.shape[0]):
for j in xrange(expect_data.shape[1]):
if numpy.abs(expect_data[i, j] - regrid_data[i, j]) > 0.0003:
mismatch_found = True
print ("expect = %#6.4f, found = %#6.4f for lon = %5.1f, " \
"lat = %5.1f" % (expect_data[i, j], regrid_data[i, j],
self.rect_center_lons[i], self.rect_center_lats[j]))
if mismatch_found:
self.fail("data mismatch found")
def test08RegridCurvToRectPatch(self):
'''
Tests the CurvRectRegridder.regridCurvToRect method using patch regridding
'''
regridder = CurvRectRegridder()
# Test with only center data, and flags only on rectilinear centers,
# using patch regridding
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats)
regridder.assignCurvField(self.curv_data)
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
self.rect_center_ignr)
regridder.assignRectField()
regrid_data = regridder.regridCurvToRect(self.undef_val,
ESMP.ESMP_REGRIDMETHOD_PATCH)
expect_data = numpy.array(self.rect_data, dtype=numpy.float64)
undef_flags = numpy.array(self.rect_center_ignr, dtype=numpy.bool)
expect_data[undef_flags] = self.undef_val
# one point falls outside the curvilinear centerpoints grid?
expect_data[5, 0] = self.undef_val
mismatch_found = False
for i in xrange(expect_data.shape[0]):
for j in xrange(expect_data.shape[1]):
if numpy.abs(expect_data[i, j] - regrid_data[i, j]) > 0.0011:
mismatch_found = True
print ("expect = %#6.4f, found = %#6.4f for lon = %5.1f, " \
"lat = %5.1f" % (expect_data[i, j], regrid_data[i, j],
self.rect_center_lons[i], self.rect_center_lats[j]))
if mismatch_found:
self.fail("data mismatch found")
def test09RegridRectToCurvConserve(self):
'''
Tests the CurvRectRegridder.regridRectToCurv method using conservative regridding
'''
regridder = CurvRectRegridder()
# Test with all corner and center data, using conservative regridding
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
self.curv_center_ignr, self.curv_corner_lons,
self.curv_corner_lats, self.curv_corner_ignr)
regridder.assignCurvField()
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats,
self.rect_center_ignr, self.rect_corner_lons,
self.rect_corner_lats, self.rect_corner_ignr)
regridder.assignRectField(self.rect_data)
regrid_data = regridder.regridRectToCurv(self.undef_val,
ESMP.ESMP_REGRIDMETHOD_CONSERVE)
expect_data = numpy.array(self.curv_data, dtype=numpy.float64)
undef_flags = numpy.array(self.curv_center_ignr, dtype=numpy.bool)
expect_data[undef_flags] = self.undef_val
# Couple "good" points next to ignored area are a bit wonky
expect_data[1, 3] = self.undef_val
regrid_data[1, 3] = self.undef_val
expect_data[2, 3] = self.undef_val
regrid_data[2, 3] = self.undef_val
mismatch_found = False
# Ignore outermost edges of curvilinear grid since
# they aren't really well covered by the rectilinear grid
# Also ignore the second east-most edge;
# also not well covered and errors are larger
for i in xrange(1, expect_data.shape[0] - 2):
for j in xrange(1, expect_data.shape[1] - 1):
if numpy.abs(expect_data[i, j] - regrid_data[i, j]) > 0.0004:
mismatch_found = True
print ("expect = %#6.4f, found = %#6.4f for lon = %7.3f, " \
"lat = %7.3f" % (expect_data[i, j], regrid_data[i, j],
self.curv_center_lons[i][j], self.curv_center_lats[i][j]))
if mismatch_found:
self.fail("data mismatch found")
def test10RegridRectToCurvBilinear(self):
'''
Tests the CurvRectRegridder.regridRectToCurv method using bilinear regridding
'''
regridder = CurvRectRegridder()
# Test with only center data and no flags, using bilinear regridding
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats)
regridder.assignCurvField()
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats)
regridder.assignRectField(self.rect_data)
regrid_data = regridder.regridRectToCurv(self.undef_val,
ESMP.ESMP_REGRIDMETHOD_BILINEAR)
expect_data = numpy.array(self.curv_data, dtype=numpy.float64)
mismatch_found = False
# Ignore outermost edges of curvilinear grid since
# they aren't really well covered by the rectilinear grid
# Also ignore the second east-most edge and second south-most edge;
# also not covered
for i in xrange(1, expect_data.shape[0] - 2):
for j in xrange(2, expect_data.shape[1] - 1):
if numpy.abs(expect_data[i, j] - regrid_data[i, j]) > 0.0003:
mismatch_found = True
print ("expect = %#6.4f, found = %#6.4f for lon = %7.3f, " \
"lat = %7.3f" % (expect_data[i, j], regrid_data[i, j],
self.curv_center_lons[i][j], self.curv_center_lats[i][j]))
if mismatch_found:
self.fail("data mismatch found")
def test11RegridRectToCurvPatch(self):
'''
Tests the CurvRectRegridder.regridRectToCurv method using patch regridding
'''
# Mark as the last test so ESMPControl().stopESMP will be called
self.last_test = True
regridder = CurvRectRegridder()
# Test with only center data, and flags only on curvilinear centers,
# using patch regridding
regridder.createCurvGrid(self.curv_center_lons, self.curv_center_lats,
self.curv_center_ignr)
regridder.assignCurvField()
regridder.createRectGrid(self.rect_center_lons, self.rect_center_lats)
regridder.assignRectField(self.rect_data)
regrid_data = regridder.regridRectToCurv(self.undef_val,
ESMP.ESMP_REGRIDMETHOD_PATCH)
expect_data = numpy.array(self.curv_data, dtype=numpy.float64)
undef_flags = numpy.array(self.curv_center_ignr, dtype=numpy.bool)
expect_data[undef_flags] = self.undef_val
mismatch_found = False
# Ignore outermost edges of curvilinear grid since
# they aren't really well covered by the rectilinear grid
# Also ignore the second east-most edge and second south-most edge;
# also not covered
for i in xrange(1, expect_data.shape[0] - 2):
for j in xrange(2, expect_data.shape[1] - 1):
if numpy.abs(expect_data[i, j] - regrid_data[i, j]) > 0.0011:
mismatch_found = True
print ("expect = %#6.4f, found = %#6.4f for lon = %7.3f, " \
"lat = %7.3f" % (expect_data[i, j], regrid_data[i, j],
self.curv_center_lons[i][j], self.curv_center_lats[i][j]))
if mismatch_found:
self.fail("data mismatch found")
def tearDown(self):
'''
Finalize ESMP if it has been initialized and if this is the last test
'''
if self.last_test:
ESMPControl().stopESMP(True)
if __name__ == "__main__":
'''
Run the unit tests in this module.
'''
unittest.main()
|
