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"""Binary BLOB field testing."""
import struct
import fiona
from fiona.model import Feature
from .conftest import requires_gpkg
@requires_gpkg
def test_binary_field(tmpdir):
meta = {
"driver": "GPKG",
"schema": {
"geometry": "Point",
"properties": {"name": "str", "data": "bytes"},
},
}
# create some binary data
input_data = struct.pack("256B", *range(256))
# write the binary data to a BLOB field
filename = str(tmpdir.join("binary_test.gpkg"))
with fiona.open(filename, "w", **meta) as dst:
feature = Feature.from_dict(
**{
"geometry": {"type": "Point", "coordinates": ((0, 0))},
"properties": {
"name": "test",
"data": input_data,
},
}
)
dst.write(feature)
# read the data back and check consistency
with fiona.open(filename, "r") as src:
feature = next(iter(src))
assert feature.properties["name"] == "test"
output_data = feature.properties["data"]
assert output_data == input_data
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