Source code for satpy.tests.reader_tests.test_clavrx.test_clavrx_geohdf

#!/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.clavrx module."""

import os
import unittest
from unittest import mock

import numpy as np
import pytest
import xarray as xr
from pyresample.geometry import AreaDefinition

from satpy.tests.reader_tests.test_hdf4_utils import FakeHDF4FileHandler

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 FakeHDF4FileHandlerGeo(FakeHDF4FileHandler): """Swap-in HDF4 File Handler."""
[docs] def get_test_content(self, filename, filename_info, filetype_info): """Mimic reader input file content.""" file_content = { "/attr/platform": "HIM8", "/attr/sensor": "AHI", # this is a Level 2 file that came from a L1B file "/attr/L1B": "clavrx_H08_20180806_1800", } file_content["longitude"] = xr.DataArray( DEFAULT_LON_DATA, dims=("y", "x"), attrs={ "_FillValue": np.nan, "scale_factor": 1., "add_offset": 0., "standard_name": "longitude", }) file_content["longitude/shape"] = DEFAULT_FILE_SHAPE file_content["latitude"] = xr.DataArray( DEFAULT_LAT_DATA, dims=("y", "x"), attrs={ "_FillValue": np.nan, "scale_factor": 1., "add_offset": 0., "standard_name": "latitude", }) file_content["latitude/shape"] = DEFAULT_FILE_SHAPE file_content["refl_1_38um_nom"] = xr.DataArray( DEFAULT_FILE_DATA.astype(np.float32), dims=("y", "x"), attrs={ "SCALED": 1, "add_offset": 59.0, "scale_factor": 0.0018616290763020515, "units": "%", "_FillValue": -32768, "valid_range": [-32767, 32767], "actual_range": [-2., 120.], "actual_missing": -999.0 }) file_content["refl_1_38um_nom/shape"] = DEFAULT_FILE_SHAPE # data with fill values file_content["variable2"] = xr.DataArray( DEFAULT_FILE_DATA.astype(np.float32), dims=("y", "x"), attrs={ "_FillValue": -1, "scale_factor": 1., "add_offset": 0., "units": "1", }) file_content["variable2/shape"] = DEFAULT_FILE_SHAPE file_content["variable2"] = file_content["variable2"].where( file_content["variable2"] % 2 != 0) # category file_content["variable3"] = xr.DataArray( DEFAULT_FILE_DATA.astype(np.byte), dims=("y", "x"), attrs={ "SCALED": 0, "_FillValue": -128, "flag_meanings": "clear water supercooled mixed ice unknown", "flag_values": [0, 1, 2, 3, 4, 5], "units": "1", }) file_content["variable3/shape"] = DEFAULT_FILE_SHAPE return file_content
[docs] class TestCLAVRXReaderGeo(unittest.TestCase): """Test CLAVR-X Reader with Geo files.""" yaml_file = "clavrx.yaml"
[docs] def setUp(self): """Wrap HDF4 file handler with our own fake handler.""" from satpy._config import config_search_paths from satpy.readers.clavrx import CLAVRXHDF4FileHandler 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(CLAVRXHDF4FileHandler, "__bases__", (FakeHDF4FileHandlerGeo,)) 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([ "clavrx_H08_20180806_1800.level2.hdf", ]) assert len(loadables) == 1 r.create_filehandlers(loadables) # make sure we have some files assert r.file_handlers
[docs] def test_no_nav_donor(self): """Test exception raised when no donor file is available.""" import xarray as xr from satpy.readers import load_reader r = load_reader(self.reader_configs) fake_fn = "clavrx_H08_20180806_1800.level2.hdf" with mock.patch("satpy.readers.clavrx.SDS", xr.DataArray): loadables = r.select_files_from_pathnames([fake_fn]) r.create_filehandlers(loadables) l1b_base = fake_fn.split(".")[0] msg = f"Missing navigation donor {l1b_base}" with pytest.raises(IOError, match=msg): r.load(["refl_1_38um_nom", "variable2", "variable3"])
[docs] def test_load_all_old_donor(self): """Test loading all test datasets with old donor.""" import xarray as xr from satpy.readers import load_reader r = load_reader(self.reader_configs) with mock.patch("satpy.readers.clavrx.SDS", xr.DataArray): loadables = r.select_files_from_pathnames([ "clavrx_H08_20180806_1800.level2.hdf", ]) r.create_filehandlers(loadables) with mock.patch("satpy.readers.clavrx.glob") as g, mock.patch("satpy.readers.clavrx.netCDF4.Dataset") as d: g.return_value = ["fake_donor.nc"] x = np.linspace(-0.1518, 0.1518, 300) y = np.linspace(0.1518, -0.1518, 10) proj = mock.Mock( semi_major_axis=6378.137, semi_minor_axis=6356.7523142, perspective_point_height=35791, longitude_of_projection_origin=140.7, sweep_angle_axis="y", ) d.return_value = fake_donor = mock.MagicMock( variables={"Projection": proj, "x": x, "y": y}, ) fake_donor.__getitem__.side_effect = lambda key: fake_donor.variables[key] datasets = r.load(["refl_1_38um_nom", "variable2", "variable3"]) assert len(datasets) == 3 for v in datasets.values(): assert "calibration" not in v.attrs assert v.attrs["units"] in ["1", "%"] assert isinstance(v.attrs["area"], AreaDefinition) if v.attrs.get("flag_values"): assert "_FillValue" in v.attrs else: assert "_FillValue" not in v.attrs if v.attrs["name"] == "refl_1_38um_nom": assert "valid_range" in v.attrs assert isinstance(v.attrs["valid_range"], list) else: assert "valid_range" not in v.attrs if "flag_values" in v.attrs: assert np.issubdtype(v.dtype, np.integer) assert v.attrs.get("flag_meanings") is not None
[docs] def test_load_all_new_donor(self): """Test loading all test datasets with new donor.""" import xarray as xr from satpy.readers import load_reader r = load_reader(self.reader_configs) with mock.patch("satpy.readers.clavrx.SDS", xr.DataArray): loadables = r.select_files_from_pathnames([ "clavrx_H08_20180806_1800.level2.hdf", ]) r.create_filehandlers(loadables) with mock.patch("satpy.readers.clavrx.glob") as g, mock.patch("satpy.readers.clavrx.netCDF4.Dataset") as d: g.return_value = ["fake_donor.nc"] x = np.linspace(-0.1518, 0.1518, 300) y = np.linspace(0.1518, -0.1518, 10) proj = mock.Mock( semi_major_axis=6378137, semi_minor_axis=6356752.3142, perspective_point_height=35791000, longitude_of_projection_origin=140.7, sweep_angle_axis="y", ) d.return_value = fake_donor = mock.MagicMock( variables={"goes_imager_projection": proj, "x": x, "y": y}, ) fake_donor.__getitem__.side_effect = lambda key: fake_donor.variables[key] datasets = r.load(["refl_1_38um_nom", "variable2", "variable3"]) assert len(datasets) == 3 for v in datasets.values(): assert "calibration" not in v.attrs assert v.attrs["units"] in ["1", "%"] assert isinstance(v.attrs["area"], AreaDefinition) assert v.attrs["area"].is_geostationary is True assert v.attrs["platform_name"] == "himawari8" assert v.attrs["sensor"] == "ahi" assert datasets["variable3"].attrs.get("flag_meanings") is not None