Source code for satpy.tests.reader_tests.test_slstr_l2

#!/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
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# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
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# 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.slstr_l2 module."""

import unittest
from unittest import mock
from unittest.mock import MagicMock, patch

import xarray as xr

from satpy.readers.slstr_l2 import SLSTRL2FileHandler


[docs]class TestSLSTRL2Reader(unittest.TestCase): """Test Sentinel-3 SST L2 reader."""
[docs] @mock.patch('xarray.open_dataset') def test_instantiate(self, mocked_dataset): """Test initialization of file handlers.""" filename_info = {} tmp = MagicMock(start_time='20191120T125002Z', stop_time='20191120T125002Z') tmp.rename.return_value = tmp xr.open_dataset.return_value = tmp SLSTRL2FileHandler('somedir/somefile.nc', filename_info, None) mocked_dataset.assert_called() mocked_dataset.reset_mock() with patch('tarfile.open') as tf: tf.return_value.__enter__.return_value = MagicMock(getnames=lambda *a: ["GHRSST-SSTskin.nc"]) SLSTRL2FileHandler('somedir/somefile.tar', filename_info, None) mocked_dataset.assert_called() mocked_dataset.reset_mock()
[docs] @mock.patch('xarray.open_dataset') def test_get_dataset(self, mocked_dataset): """Test retrieval of datasets.""" filename_info = {} tmp = MagicMock(start_time='20191120T125002Z', stop_time='20191120T125002Z') tmp.rename.return_value = tmp xr.open_dataset.return_value = tmp test = SLSTRL2FileHandler('somedir/somefile.nc', filename_info, None) test.nc = {'longitude': xr.Dataset(), 'latitude': xr.Dataset(), 'sea_surface_temperature': xr.Dataset(), 'sea_ice_fraction': xr.Dataset(), } test.get_dataset('longitude', {'standard_name': 'longitude'}) test.get_dataset('latitude', {'standard_name': 'latitude'}) test.get_dataset('sea_surface_temperature', {'standard_name': 'sea_surface_temperature'}) test.get_dataset('sea_ice_fraction', {'standard_name': 'sea_ice_fraction'}) with self.assertRaises(KeyError): test.get_dataset('erroneous dataset', {'standard_name': 'erroneous dataset'}) mocked_dataset.assert_called() mocked_dataset.reset_mock()