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import affine
import numpy
import pytest
import rasterio
from rasterio.env import GDALVersion
from .conftest import gdal_version
@pytest.mark.xfail(gdal_version < GDALVersion(3, 7), reason="GDAL < 3.7 doesn't handle signed int8 correctly")
@pytest.mark.parametrize("nodata", [-1, -128])
def test_write_int8_mem(nodata):
profile = {
"driver": "GTiff",
"width": 2,
"height": 1,
"count": 1,
"dtype": "int8",
"crs": "EPSG:3857",
"transform": affine.Affine(10, 0, 0, 0, -10, 0),
"nodata": nodata,
}
values = numpy.array([[nodata, nodata]], dtype="int8")
with rasterio.open("/vsimem/test.tif", "w", **profile) as src:
src.write(values, indexes=1)
with rasterio.open("/vsimem/test.tif") as src:
read = src.read(indexes=1)
assert read[0][0] == nodata
assert read[0][1] == nodata
@pytest.mark.parametrize("nodata", [None, -1, -128])
def test_write_int8_fs(tmp_path, nodata):
filename = tmp_path.joinpath("test.tif")
profile = {
"driver": "GTiff",
"width": 2,
"height": 1,
"count": 1,
"dtype": "int8",
"crs": "EPSG:3857",
"transform": affine.Affine(10, 0, 0, 0, -10, 0),
"nodata": nodata,
}
values = numpy.array([[127, -128]], dtype="int8")
with rasterio.open(filename, "w", **profile) as src:
src.write(values, indexes=1)
with rasterio.open(filename) as src:
read = src.read(indexes=1)
assert read[0][0] == 127
assert read[0][1] == -128
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