Source code for polar2grid.tests.test_grids.test_config_helper

#!/usr/bin/env python3
# encoding: utf-8
# Copyright (C) 2021 Space Science and Engineering Center (SSEC),
# University of Wisconsin-Madison.
#
# This program 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.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This file is part of the polar2grid software package. Polar2grid takes
# satellite observation data, remaps it, and writes it to a file format for
# input into another program.
# Documentation: http://www.ssec.wisc.edu/software/polar2grid/
"""Test grid config helper script."""

from io import StringIO

import pytest
from pyresample import parse_area_file
from pyresample.geometry import AreaDefinition

from polar2grid.grids.config_helper import main as ch_main


[docs] def test_help_usage(capsys): with pytest.raises(SystemExit) as e: ch_main(["--help"]) assert e.value.code == 0 sout = capsys.readouterr() assert "positional arguments" in sout.out # you must provide some parameters with pytest.raises(SystemExit) as e: ch_main([]) assert e.value.code != 0 sout = capsys.readouterr() assert "the following arguments are required" in sout.err
[docs] @pytest.mark.parametrize( ("lon", "lat", "exp"), [ ( "-95.0", "10.0", """my_grid: projection: proj: eqc lat_ts: 10 lat_0: 0 lon_0: -95 datum: WGS84 units: m no_defs: null type: crs shape: height: 1500 width: 1500 center: x: -95.0 y: 10.0 units: degrees resolution: dx: 1000.0 dy: 1000.0 """, ), ( "-95.0", "35.0", """my_grid: projection: proj: lcc lat_1: 35 lat_0: 35 lon_0: -95 datum: WGS84 units: m no_defs: null type: crs shape: height: 1500 width: 1500 center: x: -95.0 y: 35.0 units: degrees resolution: dx: 1000.0 dy: 1000.0 """, ), ( "-95.0", "80.0", """my_grid: projection: proj: stere lat_0: 90 lat_ts: 80 lon_0: -95 datum: WGS84 units: m no_defs: null type: crs shape: height: 1500 width: 1500 center: x: -95.0 y: 80.0 units: degrees resolution: dx: 1000.0 dy: 1000.0 """, ), ], ) def test_yaml_format(lon, lat, exp, capsys): ret = ch_main(["my_grid", lon, lat, "1000", "1000", "1500", "1500"]) assert ret is None or ret == 0 sout = capsys.readouterr() assert sout.out == exp # temp file s = StringIO() s.write(sout.out) s.seek(0) areas = parse_area_file([s]) assert len(areas) == 1 assert isinstance(areas[0], AreaDefinition)