#!/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.acspo module."""
import datetime as dt
import os
from unittest import mock
import numpy as np
import pytest
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."""
date = filename_info.get("start_time", dt.datetime(2016, 1, 1, 12, 0, 0))
sat, inst = {
"VIIRS_NPP": ("NPP", "VIIRS"),
"VIIRS_N20": ("N20", "VIIRS"),
}[filename_info["sensor_id"]]
file_content = {
"/attr/platform": sat,
"/attr/sensor": inst,
"/attr/spatial_resolution": "742 m at nadir",
"/attr/time_coverage_start": date.strftime("%Y%m%dT%H%M%SZ"),
"/attr/time_coverage_end": (date + dt.timedelta(minutes=6)).strftime("%Y%m%dT%H%M%SZ"),
}
file_content["lat"] = DEFAULT_LAT_DATA
file_content["lat/attr/comment"] = "Latitude of retrievals"
file_content["lat/attr/long_name"] = "latitude"
file_content["lat/attr/standard_name"] = "latitude"
file_content["lat/attr/units"] = "degrees_north"
file_content["lat/attr/valid_min"] = -90.
file_content["lat/attr/valid_max"] = 90.
file_content["lat/shape"] = DEFAULT_FILE_SHAPE
file_content["lon"] = DEFAULT_LON_DATA
file_content["lon/attr/comment"] = "Longitude of retrievals"
file_content["lon/attr/long_name"] = "longitude"
file_content["lon/attr/standard_name"] = "longitude"
file_content["lon/attr/units"] = "degrees_east"
file_content["lon/attr/valid_min"] = -180.
file_content["lon/attr/valid_max"] = 180.
file_content["lon/shape"] = DEFAULT_FILE_SHAPE
for k in ["sea_surface_temperature",
"satellite_zenith_angle",
"sea_ice_fraction",
"wind_speed"]:
file_content[k] = DEFAULT_FILE_DATA[None, ...]
file_content[k + "/attr/scale_factor"] = 1.1
file_content[k + "/attr/add_offset"] = 0.1
file_content[k + "/attr/units"] = "some_units"
file_content[k + "/attr/comment"] = "comment"
file_content[k + "/attr/standard_name"] = "standard_name"
file_content[k + "/attr/long_name"] = "long_name"
file_content[k + "/attr/valid_min"] = 0
file_content[k + "/attr/valid_max"] = 65534
file_content[k + "/attr/_FillValue"] = 65534
file_content[k + "/shape"] = (1, DEFAULT_FILE_SHAPE[0], DEFAULT_FILE_SHAPE[1])
file_content["l2p_flags"] = np.zeros(
(1, DEFAULT_FILE_SHAPE[0], DEFAULT_FILE_SHAPE[1]),
dtype=np.uint16)
convert_file_content_to_data_array(file_content, dims=("time", "nj", "ni"))
return file_content
[docs]
class TestACSPOReader:
"""Test ACSPO Reader."""
yaml_file = "acspo.yaml"
[docs]
def setup_method(self):
"""Wrap NetCDF4 file handler with our own fake handler."""
from satpy._config import config_search_paths
from satpy.readers.acspo import ACSPOFileHandler
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(ACSPOFileHandler, "__bases__", (FakeNetCDF4FileHandler2,))
self.fake_handler = self.p.start()
self.p.is_local = True
[docs]
def teardown_method(self):
"""Stop wrapping the NetCDF4 file handler."""
self.p.stop()
[docs]
@pytest.mark.parametrize(
"filename",
[
("20170401174600-STAR-L2P_GHRSST-SSTskin-VIIRS_NPP-ACSPO_V2.40-v02.0-fv01.0.nc"),
("20210916161708-STAR-L2P_GHRSST-SSTsubskin-VIIRS_N20-ACSPO_V2.80-v02.0-fv01.0.nc"),
]
)
def test_init(self, filename):
"""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([filename])
assert len(loadables) == 1
r.create_filehandlers(loadables)
# make sure we have some files
assert r.file_handlers
[docs]
def test_load_every_dataset(self):
"""Test loading all datasets."""
from satpy.readers import load_reader
r = load_reader(self.reader_configs)
loadables = r.select_files_from_pathnames([
"20170401174600-STAR-L2P_GHRSST-SSTskin-VIIRS_NPP-ACSPO_V2.40-v02.0-fv01.0.nc",
])
r.create_filehandlers(loadables)
datasets = r.load(["sst",
"satellite_zenith_angle",
"sea_ice_fraction",
"wind_speed"])
assert len(datasets) == 4
for d in datasets.values():
assert d.shape == DEFAULT_FILE_SHAPE
assert d.dims == ("y", "x")
assert d.attrs["sensor"] == "viirs"
assert d.attrs["rows_per_scan"] == 16