#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2020 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.smos_l2_wind module."""
import os
import unittest
from datetime import datetime
from unittest import mock
import numpy as np
import xarray as xr
from satpy.tests.reader_tests.test_netcdf_utils import FakeNetCDF4FileHandler
[docs]class FakeNetCDF4FileHandlerSMOSL2WIND(FakeNetCDF4FileHandler):
"""Swap-in NetCDF4 File Handler."""
[docs] def get_test_content(self, filename, filename_info, filetype_info):
"""Mimic reader input file content."""
from xarray import DataArray
dt_s = filename_info.get('start_time', datetime(2020, 4, 22, 12, 0, 0))
dt_e = filename_info.get('end_time', datetime(2020, 4, 22, 12, 0, 0))
if filetype_info['file_type'] == 'smos_l2_wind':
file_content = {
'/attr/time_coverage_start': dt_s.strftime('%Y-%m-%dT%H:%M:%S Z'),
'/attr/time_coverage_end': dt_e.strftime('%Y-%m-%dT%H:%M:%S Z'),
'/attr/platform_shortname': 'SM',
'/attr/platform': 'SMOS',
'/attr/instrument': 'MIRAS',
'/attr/processing_level': 'L2',
'/attr/geospatial_bounds_vertical_crs': 'EPSG:4623',
}
file_content['lat'] = np.arange(-90., 90.25, 0.25)
file_content['lat/shape'] = (len(file_content['lat']),)
file_content['lat'] = DataArray(file_content['lat'], dims=('lat'))
file_content['lat'].attrs['_FillValue'] = -999.0
file_content['lon'] = np.arange(0., 360., 0.25)
file_content['lon/shape'] = (len(file_content['lon']),)
file_content['lon'] = DataArray(file_content['lon'], dims=('lon'))
file_content['lon'].attrs['_FillValue'] = -999.0
file_content['wind_speed'] = np.ndarray(shape=(1, # Time dimension
len(file_content['lat']),
len(file_content['lon'])))
file_content['wind_speed/shape'] = (1,
len(file_content['lat']),
len(file_content['lon']))
file_content['wind_speed'] = DataArray(file_content['wind_speed'], dims=('time', 'lat', 'lon'),
coords=[[1], file_content['lat'], file_content['lon']])
file_content['wind_speed'].attrs['_FillValue'] = -999.0
else:
raise AssertionError()
return file_content
[docs]class TestSMOSL2WINDReader(unittest.TestCase):
"""Test SMOS L2 WINDReader."""
yaml_file = "smos_l2_wind.yaml"
[docs] def setUp(self):
"""Wrap NetCDF4 file handler with our own fake handler."""
from satpy._config import config_search_paths
from satpy.readers.smos_l2_wind import SMOSL2WINDFileHandler
self.reader_configs = config_search_paths(os.path.join('readers', self.yaml_file))
# http://stackoverflow.com/questions/12219967/how-to-mock-a-base-class-with-python-mock-library
self.p = mock.patch.object(SMOSL2WINDFileHandler, '__bases__', (FakeNetCDF4FileHandlerSMOSL2WIND,))
self.fake_handler = self.p.start()
self.p.is_local = True
[docs] def tearDown(self):
"""Stop wrapping the NetCDF4 file handler."""
self.p.stop()
[docs] def test_init(self):
"""Test basic initialization of this reader."""
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
loadables = r.select_files_from_pathnames([
'SM_OPER_MIR_SCNFSW_20200420T021649_20200420T035013_110_001_7.nc',
])
self.assertEqual(len(loadables), 1)
r.create_filehandlers(loadables)
# make sure we have some files
self.assertTrue(r.file_handlers)
[docs] def test_load_wind_speed(self):
"""Load wind_speed dataset."""
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
with mock.patch('satpy.readers.smos_l2_wind.netCDF4.Variable', xr.DataArray):
loadables = r.select_files_from_pathnames([
'SM_OPER_MIR_SCNFSW_20200420T021649_20200420T035013_110_001_7.nc',
])
r.create_filehandlers(loadables)
ds = r.load(['wind_speed'])
self.assertEqual(len(ds), 1)
for d in ds.values():
self.assertEqual(d.attrs['platform_shortname'], 'SM')
self.assertEqual(d.attrs['sensor'], 'MIRAS')
self.assertIn('area', d.attrs)
self.assertIsNotNone(d.attrs['area'])
self.assertIn('y', d.dims)
self.assertIn('x', d.dims)
self.assertEqual(d.shape, (719, 1440))
self.assertEqual(d.y[0].data, -89.75)
self.assertEqual(d.y[d.shape[0] - 1].data, 89.75)
[docs] def test_load_lat(self):
"""Load lat dataset."""
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
with mock.patch('satpy.readers.smos_l2_wind.netCDF4.Variable', xr.DataArray):
loadables = r.select_files_from_pathnames([
'SM_OPER_MIR_SCNFSW_20200420T021649_20200420T035013_110_001_7.nc',
])
r.create_filehandlers(loadables)
ds = r.load(['lat'])
self.assertEqual(len(ds), 1)
for d in ds.values():
self.assertIn('y', d.dims)
self.assertEqual(d.shape, (719,))
self.assertEqual(d.data[0], -89.75)
self.assertEqual(d.data[d.shape[0] - 1], 89.75)
[docs] def test_load_lon(self):
"""Load lon dataset."""
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
with mock.patch('satpy.readers.smos_l2_wind.netCDF4.Variable', xr.DataArray):
loadables = r.select_files_from_pathnames([
'SM_OPER_MIR_SCNFSW_20200420T021649_20200420T035013_110_001_7.nc',
])
r.create_filehandlers(loadables)
ds = r.load(['lon'])
self.assertEqual(len(ds), 1)
for d in ds.values():
self.assertIn('x', d.dims)
self.assertEqual(d.shape, (1440,))
self.assertEqual(d.data[0], -180.0)
self.assertEqual(d.data[d.shape[0] - 1], 179.75)
[docs] def test_adjust_lon(self):
"""Load adjust longitude dataset."""
from xarray import DataArray
from satpy.readers.smos_l2_wind import SMOSL2WINDFileHandler
smos_l2_wind_fh = SMOSL2WINDFileHandler('SM_OPER_MIR_SCNFSW_20200420T021649_20200420T035013_110_001_7.nc',
{}, filetype_info={'file_type': 'smos_l2_wind'})
data = DataArray(np.arange(0., 360., 0.25), dims=('lon'))
adjusted = smos_l2_wind_fh._adjust_lon_coord(data)
expected = DataArray(np.concatenate((np.arange(0, 180., 0.25),
np.arange(-180.0, 0, 0.25))),
dims=('lon'))
self.assertEqual(adjusted.data.tolist(), expected.data.tolist())
[docs] def test_roll_dataset(self):
"""Load roll of dataset along the lon coordinate."""
from xarray import DataArray
from satpy.readers.smos_l2_wind import SMOSL2WINDFileHandler
smos_l2_wind_fh = SMOSL2WINDFileHandler('SM_OPER_MIR_SCNFSW_20200420T021649_20200420T035013_110_001_7.nc',
{}, filetype_info={'file_type': 'smos_l2_wind'})
data = DataArray(np.arange(0., 360., 0.25), dims=('lon'))
data = smos_l2_wind_fh._adjust_lon_coord(data)
adjusted = smos_l2_wind_fh._roll_dataset_lon_coord(data)
expected = np.arange(-180., 180., 0.25)
self.assertEqual(adjusted.data.tolist(), expected.tolist())