#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2018 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.geocat module."""
import os
import unittest
from unittest import mock
import numpy as np
from satpy.tests.reader_tests.test_netcdf_utils import FakeNetCDF4FileHandler
from satpy.tests.utils import convert_file_content_to_data_array
DEFAULT_FILE_DTYPE = np.uint16
DEFAULT_FILE_SHAPE = (10, 300)
DEFAULT_FILE_DATA = np.arange(DEFAULT_FILE_SHAPE[0] * DEFAULT_FILE_SHAPE[1],
dtype=DEFAULT_FILE_DTYPE).reshape(DEFAULT_FILE_SHAPE)
DEFAULT_FILE_FACTORS = np.array([2.0, 1.0], dtype=np.float32)
DEFAULT_LAT_DATA = np.linspace(45, 65, DEFAULT_FILE_SHAPE[1]).astype(DEFAULT_FILE_DTYPE)
DEFAULT_LAT_DATA = np.repeat([DEFAULT_LAT_DATA], DEFAULT_FILE_SHAPE[0], axis=0)
DEFAULT_LON_DATA = np.linspace(5, 45, DEFAULT_FILE_SHAPE[1]).astype(DEFAULT_FILE_DTYPE)
DEFAULT_LON_DATA = np.repeat([DEFAULT_LON_DATA], DEFAULT_FILE_SHAPE[0], axis=0)
[docs]class FakeNetCDF4FileHandler2(FakeNetCDF4FileHandler):
"""Swap-in NetCDF4 File Handler."""
[docs] def get_test_content(self, filename, filename_info, filetype_info):
"""Mimic reader input file content."""
file_content = {
'/attr/Platform_Name': filename_info['platform_shortname'],
'/attr/Element_Resolution': 2.,
'/attr/Line_Resolution': 2.,
'/attr/Subsatellite_Longitude': -70.2 if 'GOES' in filename_info['platform_shortname'] else 140.65,
'pixel_longitude': DEFAULT_LON_DATA,
'pixel_longitude/attr/scale_factor': 1.,
'pixel_longitude/attr/add_offset': 0.,
'pixel_longitude/shape': DEFAULT_FILE_SHAPE,
'pixel_longitude/attr/_FillValue': np.nan,
'pixel_latitude': DEFAULT_LAT_DATA,
'pixel_latitude/attr/scale_factor': 1.,
'pixel_latitude/attr/add_offset': 0.,
'pixel_latitude/shape': DEFAULT_FILE_SHAPE,
'pixel_latitude/attr/_FillValue': np.nan,
}
sensor = {
'HIMAWARI-8': 'himawari8',
'GOES-17': 'goesr',
'GOES-16': 'goesr',
'GOES-13': 'goes',
'GOES-14': 'goes',
'GOES-15': 'goes',
}[filename_info['platform_shortname']]
file_content['/attr/Sensor_Name'] = sensor
if filename_info['platform_shortname'] == 'HIMAWARI-8':
file_content['pixel_longitude'] = DEFAULT_LON_DATA + 130.
file_content['variable1'] = DEFAULT_FILE_DATA.astype(np.float32)
file_content['variable1/attr/_FillValue'] = -1
file_content['variable1/attr/scale_factor'] = 1.
file_content['variable1/attr/add_offset'] = 0.
file_content['variable1/attr/units'] = '1'
file_content['variable1/shape'] = DEFAULT_FILE_SHAPE
# data with fill values
file_content['variable2'] = np.ma.masked_array(
DEFAULT_FILE_DATA.astype(np.float32),
mask=np.zeros_like(DEFAULT_FILE_DATA))
file_content['variable2'].mask[::5, ::5] = True
file_content['variable2/attr/_FillValue'] = -1
file_content['variable2/attr/scale_factor'] = 1.
file_content['variable2/attr/add_offset'] = 0.
file_content['variable2/attr/units'] = '1'
file_content['variable2/shape'] = DEFAULT_FILE_SHAPE
# category
file_content['variable3'] = DEFAULT_FILE_DATA.astype(np.byte)
file_content['variable3/attr/_FillValue'] = -128
file_content['variable3/attr/flag_meanings'] = "clear water supercooled mixed ice unknown"
file_content['variable3/attr/flag_values'] = [0, 1, 2, 3, 4, 5]
file_content['variable3/attr/units'] = '1'
file_content['variable3/shape'] = DEFAULT_FILE_SHAPE
attrs = ('_FillValue', 'flag_meanings', 'flag_values', 'units')
convert_file_content_to_data_array(
file_content, attrs=attrs,
dims=('z', 'lines', 'elements'))
return file_content
[docs]class TestGEOCATReader(unittest.TestCase):
"""Test GEOCAT Reader."""
yaml_file = "geocat.yaml"
[docs] def setUp(self):
"""Wrap NetCDF4 file handler with our own fake handler."""
from satpy._config import config_search_paths
from satpy.readers.geocat import GEOCATFileHandler
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(GEOCATFileHandler, '__bases__', (FakeNetCDF4FileHandler2,))
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 init with no extra parameters."""
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
loadables = r.select_files_from_pathnames([
'geocatL2.GOES-13.2015143.234500.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_all_old_goes(self):
"""Test loading all test datasets from old GOES files."""
import xarray as xr
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
with mock.patch('satpy.readers.geocat.netCDF4.Variable', xr.DataArray):
loadables = r.select_files_from_pathnames([
'geocatL2.GOES-13.2015143.234500.nc',
])
r.create_filehandlers(loadables)
datasets = r.load(['variable1',
'variable2',
'variable3'])
self.assertEqual(len(datasets), 3)
for v in datasets.values():
assert 'calibration' not in v.attrs
self.assertEqual(v.attrs['units'], '1')
self.assertIsNotNone(datasets['variable3'].attrs.get('flag_meanings'))
[docs] def test_load_all_himawari8(self):
"""Test loading all test datasets from H8 NetCDF file."""
import xarray as xr
from pyresample.geometry import AreaDefinition
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
with mock.patch('satpy.readers.geocat.netCDF4.Variable', xr.DataArray):
loadables = r.select_files_from_pathnames([
'geocatL2.HIMAWARI-8.2017092.210730.R304.R20.nc',
])
r.create_filehandlers(loadables)
datasets = r.load(['variable1',
'variable2',
'variable3'])
self.assertEqual(len(datasets), 3)
for v in datasets.values():
assert 'calibration' not in v.attrs
self.assertEqual(v.attrs['units'], '1')
self.assertIsNotNone(datasets['variable3'].attrs.get('flag_meanings'))
self.assertIsInstance(datasets['variable1'].attrs['area'], AreaDefinition)
[docs] def test_load_all_goes17_hdf4(self):
"""Test loading all test datasets from GOES-17 HDF4 file."""
import xarray as xr
from pyresample.geometry import AreaDefinition
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
with mock.patch('satpy.readers.geocat.netCDF4.Variable', xr.DataArray):
loadables = r.select_files_from_pathnames([
'geocatL2.GOES-17.CONUS.2020041.163130.hdf',
])
r.create_filehandlers(loadables)
datasets = r.load(['variable1',
'variable2',
'variable3'])
self.assertEqual(len(datasets), 3)
for v in datasets.values():
assert 'calibration' not in v.attrs
self.assertEqual(v.attrs['units'], '1')
self.assertIsNotNone(datasets['variable3'].attrs.get('flag_meanings'))
self.assertIsInstance(datasets['variable1'].attrs['area'], AreaDefinition)