# Copyright (c) 2016-2021 Satpy developers
#
# This file is part of satpy.
#
# satpy is free software: you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# satpy is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# satpy. If not, see <http://www.gnu.org/licenses/>.
"""Module for testing the satpy.readers.meris_nc_sen3 module."""
import unittest
import unittest.mock as mock
[docs]class TestMERISReader(unittest.TestCase):
"""Test various meris_nc_sen3 filehandlers."""
[docs] @mock.patch('xarray.open_dataset')
def test_instantiate(self, mocked_dataset):
"""Test initialization of file handlers."""
from satpy.readers.meris_nc_sen3 import NCMERIS2, NCMERISCal, NCMERISGeo
from satpy.tests.utils import make_dataid
ds_id = make_dataid(name='M01', calibration='reflectance')
ds_id2 = make_dataid(name='wsqf', calibration='reflectance')
filename_info = {'mission_id': 'ENV', 'dataset_name': 'M01', 'start_time': 0, 'end_time': 0}
test = NCMERISCal('somedir/somefile.nc', filename_info, 'c')
test.get_dataset(ds_id, filename_info)
mocked_dataset.assert_called()
mocked_dataset.reset_mock()
test = NCMERISGeo('somedir/somefile.nc', filename_info, 'c')
test.get_dataset(ds_id, filename_info)
mocked_dataset.assert_called()
mocked_dataset.reset_mock()
test = NCMERIS2('somedir/somefile.nc', filename_info, 'c')
test.get_dataset(ds_id, {'nc_key': 'the_key'})
test.get_dataset(ds_id2, {'nc_key': 'the_key'})
mocked_dataset.assert_called()
mocked_dataset.reset_mock()
[docs] @mock.patch('xarray.open_dataset')
def test_open_file_objects(self, mocked_open_dataset):
"""Test initialization of file handlers."""
from satpy.readers.olci_nc import NCOLCIBase
filename_info = {'mission_id': 'ENV', 'dataset_name': 'M01', 'start_time': 0, 'end_time': 0}
open_file = mock.MagicMock()
file_handler = NCOLCIBase(open_file, filename_info, 'c')
# deepcode ignore W0104: This is a property that is actually a function call.
file_handler.nc # pylint: disable=W0104
mocked_open_dataset.assert_called()
open_file.open.assert_called()
assert (open_file.open.return_value in mocked_open_dataset.call_args[0] or
open_file.open.return_value == mocked_open_dataset.call_args[1].get('filename_or_obj'))
[docs] @mock.patch('xarray.open_dataset')
def test_get_dataset(self, mocked_dataset):
"""Test reading datasets."""
import numpy as np
import xarray as xr
from satpy.readers.meris_nc_sen3 import NCMERIS2
from satpy.tests.utils import make_dataid
mocked_dataset.return_value = xr.Dataset({'mask': (['rows', 'columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6))},
coords={'rows': np.arange(5),
'columns': np.arange(6)})
ds_id = make_dataid(name='mask')
filename_info = {'mission_id': 'ENV', 'dataset_name': 'mask', 'start_time': 0, 'end_time': 0}
test = NCMERIS2('somedir/somefile.nc', filename_info, 'c')
res = test.get_dataset(ds_id, {'nc_key': 'mask'})
self.assertEqual(res.dtype, np.dtype('bool'))
[docs] @mock.patch('xarray.open_dataset')
def test_meris_angles(self, mocked_dataset):
"""Test reading datasets."""
import numpy as np
import xarray as xr
from satpy.readers.meris_nc_sen3 import NCMERISAngles
from satpy.tests.utils import make_dataid
attr_dict = {
'ac_subsampling_factor': 1,
'al_subsampling_factor': 2,
}
mocked_dataset.return_value = xr.Dataset({'SAA': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6)),
'SZA': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6)),
'OAA': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6)),
'OZA': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6))},
coords={'rows': np.arange(5),
'columns': np.arange(6)},
attrs=attr_dict)
filename_info = {'mission_id': 'ENV', 'dataset_name': 'M01', 'start_time': 0, 'end_time': 0}
ds_id = make_dataid(name='solar_azimuth_angle')
ds_id2 = make_dataid(name='satellite_zenith_angle')
test = NCMERISAngles('somedir/somefile.nc', filename_info, 'c')
test.get_dataset(ds_id, filename_info)
test.get_dataset(ds_id2, filename_info)
mocked_dataset.assert_called()
mocked_dataset.reset_mock()
[docs] @mock.patch('xarray.open_dataset')
def test_meris_meteo(self, mocked_dataset):
"""Test reading datasets."""
import numpy as np
import xarray as xr
from satpy.readers.meris_nc_sen3 import NCMERISMeteo
from satpy.tests.utils import make_dataid
attr_dict = {
'ac_subsampling_factor': 1,
'al_subsampling_factor': 2,
}
data = {'humidity': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6)),
'total_ozone': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6)),
'sea_level_pressure': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6)),
'total_columnar_water_vapour': (['tie_rows', 'tie_columns'],
np.array([1 << x for x in range(30)]).reshape(5, 6))}
mocked_dataset.return_value = xr.Dataset(data,
coords={'rows': np.arange(5),
'columns': np.arange(6)},
attrs=attr_dict)
filename_info = {'mission_id': 'ENV', 'dataset_name': 'humidity', 'start_time': 0, 'end_time': 0}
ds_id = make_dataid(name='humidity')
ds_id2 = make_dataid(name='total_ozone')
test = NCMERISMeteo('somedir/somefile.nc', filename_info, 'c')
test.get_dataset(ds_id, filename_info)
test.get_dataset(ds_id2, filename_info)
mocked_dataset.assert_called()
mocked_dataset.reset_mock()
[docs]class TestBitFlags(unittest.TestCase):
"""Test the bitflag reading."""
[docs] def test_bitflags(self):
"""Test the BitFlags class."""
from functools import reduce
import numpy as np
from satpy.readers.olci_nc import BitFlags
flag_list = ['SEA_ICE', 'MEGLINT', 'HIGHGLINT', 'CASE2_S', 'CASE2_ANOM',
'HAZE_OVER_WATER', 'WHITECAPS', 'AC_FAIL', 'BPAC_ON', 'WHITE_SCATT',
'LOWRW', 'HIGHRW', 'OUT_OF_RANGE_AAC', 'OUT_OF_SCOPE_AAC',
'OUT_OF_RANGE_OC_NN', 'OUT_OF_SCOPE_OC_NN',
'OUT_OF_RANGE_CHL_OC4ME_INPUT', 'OUT_OF_RANGE_CHL_OC4ME']
bits = np.array([1 << x for x in range(len(flag_list))])
bflags = BitFlags(bits, flag_list=flag_list)
items = ['SEA_ICE', 'MEGLINT', 'HIGHGLINT',
'HAZE_OVER_WATER', 'WHITECAPS', 'AC_FAIL', 'WHITE_SCATT',
'LOWRW', 'HIGHRW', 'OUT_OF_RANGE_AAC', 'OUT_OF_SCOPE_AAC',
'OUT_OF_RANGE_OC_NN', 'OUT_OF_SCOPE_OC_NN',
'OUT_OF_RANGE_CHL_OC4ME_INPUT', 'OUT_OF_RANGE_CHL_OC4ME']
mask = reduce(np.logical_or, [bflags[item] for item in items])
expected = np.array([True, True, True, False, False, True, True,
True, False, True, True, True, True, True, True,
True, True, True])
self.assertTrue(all(mask == expected))