"""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