Source code for satpy.tests.reader_tests.test_mimic_TPW2_nc

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2019 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.tropomi_l2 module."""

import datetime as dt
import os
import unittest
from unittest import mock

import numpy as np
import xarray as xr

from satpy.tests.reader_tests.test_netcdf_utils import FakeNetCDF4FileHandler

DEFAULT_FILE_DTYPE = np.float32
DEFAULT_FILE_SHAPE = (9001, 18000)
DEFAULT_LAT = np.linspace(-90, 90, DEFAULT_FILE_SHAPE[0], dtype=DEFAULT_FILE_DTYPE)
DEFAULT_LON = np.linspace(-180, 180, DEFAULT_FILE_SHAPE[1], dtype=DEFAULT_FILE_DTYPE)
DEFAULT_FILE_DATA = np.arange(DEFAULT_FILE_SHAPE[0] * DEFAULT_FILE_SHAPE[1],
                              dtype=DEFAULT_FILE_DTYPE).reshape(DEFAULT_FILE_SHAPE)
file_content_units = dict()


[docs] class FakeNetCDF4FileHandlerMimic(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", dt.datetime(2019, 6, 19, 13, 0)) dt_e = filename_info.get("end_time", dt.datetime(2019, 6, 19, 13, 0)) if filetype_info["file_type"] == "mimicTPW2_comp": file_content = { "/attr/start_time": dt_s.strftime("%Y%m%d.%H%M%S"), "/attr/end_time": dt_e.strftime("%Y%m%d.%H%M%S"), "/attr/platform_shortname": "aggregated microwave", "/attr/sensor": "mimic", } file_content["latArr"] = DEFAULT_LAT file_content["latArr/shape"] = (DEFAULT_FILE_SHAPE[0],) file_content["latArr/attr/units"] = "degress_north" file_content["lonArr"] = DEFAULT_LON file_content["lonArr/shape"] = (DEFAULT_FILE_SHAPE[1],) file_content["lonArr/attr/units"] = "degrees_east" file_content["tpwGrid"] = DEFAULT_FILE_DATA file_content["tpwGrid/shape"] = DEFAULT_FILE_SHAPE file_content_units["tpwGrid"] = "mm" file_content["/dimension/lat"] = DEFAULT_FILE_SHAPE[0] file_content["/dimension/lon"] = DEFAULT_FILE_SHAPE[1] # convert to xarrays for key, val in file_content.items(): if key == "lonArr" or key == "latArr": file_content[key] = DataArray(val) elif isinstance(val, np.ndarray): if val.ndim > 1: file_content[key] = DataArray(val, dims=("y", "x"), attrs={"units": file_content_units[key]}) else: file_content[key] = DataArray(val) else: msg = "Wrong Test Reader for file_type {}".format(filetype_info["file_type"]) raise AssertionError(msg) return file_content
[docs] class TestMimicTPW2Reader(unittest.TestCase): """Test Mimic Reader.""" yaml_file = "mimicTPW2_comp.yaml"
[docs] def setUp(self): """Wrap NetCDF4 file handler with our own fake handler.""" from satpy._config import config_search_paths from satpy.readers.mimic_TPW2_nc import MimicTPW2FileHandler 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(MimicTPW2FileHandler, "__bases__", (FakeNetCDF4FileHandlerMimic,)) 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([ "comp20190619.130000.nc", ]) assert len(loadables) == 1 r.create_filehandlers(loadables) # make sure we have some files assert r.file_handlers
[docs] def test_load_mimic(self): """Load Mimic data.""" from satpy.readers import load_reader r = load_reader(self.reader_configs) with mock.patch("satpy.readers.mimic_TPW2_nc.netCDF4.Variable", xr.DataArray): loadables = r.select_files_from_pathnames([ "comp20190619.130000.nc", ]) r.create_filehandlers(loadables) ds = r.load(["tpwGrid"]) assert len(ds) == 1 for d in ds.values(): assert d.attrs["platform_shortname"] == "aggregated microwave" assert d.attrs["sensor"] == "mimic" assert "area" in d.attrs assert "units" in d.attrs assert d.attrs["area"] is not None