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"""Collection of miscellaneous minor tests."""
import os
from tempfile import NamedTemporaryFile
import numpy as np
import pygrib
import pytest
def test_internal_value_type_of_runtime_error():
grbindx = pygrib.index("../sampledata/gfs.grb", "shortName")
with pytest.raises(RuntimeError) as e:
grbindx.write("nonexistent/path")
assert type(e.value.args[0]) is str
@pytest.mark.parametrize(
"data_fname,scanning_mode,expected_values",
[
(
"scanning_mode.grib2",
0b00000000,
np.array([[0, 1], [2, 3], [4, 5]], dtype=float),
),
(
"scanning_mode.grib2",
0b10000000,
np.array([[0, 1], [2, 3], [4, 5]], dtype=float),
),
(
"scanning_mode.grib2",
0b01000000,
np.array([[0, 1], [2, 3], [4, 5]], dtype=float),
),
(
"scanning_mode.grib2",
0b00100000,
np.array([[0, 3], [1, 4], [2, 5]], dtype=float),
),
(
"scanning_mode.grib2",
0b00010000,
np.array([[0, 1], [3, 2], [4, 5]], dtype=float),
),
(
"scanning_mode.grib2",
0b00110000,
np.array([[0, 3], [4, 1], [2, 5]], dtype=float),
),
(
"scanning_mode_with_bitmap.grib2",
0b00000000,
np.array([[np.nan, 1], [2, 3], [4, 5]], dtype=float),
),
(
"scanning_mode_with_bitmap.grib2",
0b10000000,
np.array([[np.nan, 1], [2, 3], [4, 5]], dtype=float),
),
(
"scanning_mode_with_bitmap.grib2",
0b01000000,
np.array([[np.nan, 1], [2, 3], [4, 5]], dtype=float),
),
(
"scanning_mode_with_bitmap.grib2",
0b00100000,
np.array([[np.nan, 3], [1, 4], [2, 5]], dtype=float),
),
(
"scanning_mode_with_bitmap.grib2",
0b00010000,
np.array([[np.nan, 1], [3, 2], [4, 5]], dtype=float),
),
(
"scanning_mode_with_bitmap.grib2",
0b00110000,
np.array([[np.nan, 3], [4, 1], [2, 5]], dtype=float),
),
],
)
def test_scanning_mode(data_fname, scanning_mode, expected_values):
template_path = f"../sampledata/{data_fname}"
with open(template_path, "rb") as f:
template = f.read()
scanning_mode_index = 0x6C
bytes_ = (
template[:scanning_mode_index]
+ scanning_mode.to_bytes(1, "big")
+ template[scanning_mode_index + 1 :]
)
with NamedTemporaryFile(mode="wb", delete=False) as temp:
temp.write(bytes_)
grbs = pygrib.open(temp.name)
actual = grbs[1].values
np.testing.assert_array_equal(actual, expected_values)
grbs.close()
os.unlink(temp.name)
|
