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"""Note well: collection slicing is deprecated!"""
import tempfile
import shutil
import os
import pytest
from fiona.env import GDALVersion
import fiona
from fiona.drvsupport import supported_drivers, _driver_supports_mode
from fiona.errors import FionaDeprecationWarning
from fiona.model import Feature
from .conftest import get_temp_filename
gdal_version = GDALVersion.runtime()
def test_collection_get(path_coutwildrnp_shp):
with fiona.open(path_coutwildrnp_shp) as src:
result = src[5]
assert result.id == "5"
def test_collection_slice(path_coutwildrnp_shp):
with pytest.warns(FionaDeprecationWarning), fiona.open(path_coutwildrnp_shp) as src:
results = src[:5]
assert isinstance(results, list)
assert len(results) == 5
assert results[4].id == "4"
def test_collection_iterator_slice(path_coutwildrnp_shp):
with fiona.open(path_coutwildrnp_shp) as src:
results = list(src.items(5))
assert len(results) == 5
k, v = results[4]
assert k == 4
assert v.id == "4"
def test_collection_iterator_next(path_coutwildrnp_shp):
with fiona.open(path_coutwildrnp_shp) as src:
k, v = next(src.items(5, None))
assert k == 5
assert v.id == "5"
@pytest.fixture(
scope="module",
params=[
driver
for driver in supported_drivers
if _driver_supports_mode(driver, "w")
and driver not in {"DGN", "MapInfo File", "GPSTrackMaker", "GPX", "BNA", "DXF"}
],
)
def slice_dataset_path(request):
"""Create temporary datasets for test_collection_iterator_items_slice()"""
driver = request.param
min_id = 0
max_id = 9
def get_schema(driver):
special_schemas = {
"CSV": {"geometry": None, "properties": {"position": "int"}}
}
return special_schemas.get(
driver,
{"geometry": "Point", "properties": {"position": "int"}},
)
def get_records(driver, range):
special_records1 = {
"CSV": [
Feature.from_dict(**{"geometry": None, "properties": {"position": i}})
for i in range
],
"PCIDSK": [
Feature.from_dict(
**{
"geometry": {
"type": "Point",
"coordinates": (0.0, float(i), 0.0),
},
"properties": {"position": i},
}
)
for i in range
],
}
return special_records1.get(
driver,
[
Feature.from_dict(
**{
"geometry": {"type": "Point", "coordinates": (0.0, float(i))},
"properties": {"position": i},
}
)
for i in range
],
)
schema = get_schema(driver)
records = get_records(driver, range(min_id, max_id + 1))
create_kwargs = {}
if driver == "FlatGeobuf":
create_kwargs["SPATIAL_INDEX"] = False
tmpdir = tempfile.mkdtemp()
path = os.path.join(tmpdir, get_temp_filename(driver))
with fiona.open(
path, "w", driver=driver, crs="OGC:CRS84", schema=schema, **create_kwargs
) as c:
c.writerecords(records)
yield path
shutil.rmtree(tmpdir)
@pytest.mark.parametrize(
"args",
[
(0, 5, None),
(1, 5, None),
(-5, None, None),
(-5, -1, None),
(0, None, None),
(5, None, None),
(8, None, None),
(9, None, None),
(10, None, None),
(0, 5, 2),
(0, 5, 2),
(1, 5, 2),
(-5, None, 2),
(-5, -1, 2),
(0, None, 2),
(0, 8, 2),
(0, 9, 2),
(0, 10, 2),
(1, 8, 2),
(1, 9, 2),
(1, 10, 2),
(1, None, 2),
(5, None, 2),
(5, None, -1),
(5, None, -2),
(5, None, None),
(4, None, -2),
(-1, -5, -1),
(-5, None, -1),
(0, 5, 1),
(5, 15, 1),
(15, 30, 1),
(5, 0, -1),
(15, 5, -1),
(30, 15, -1),
(0, 5, 2),
(5, 15, 2),
(15, 30, 2),
(5, 0, -2),
(15, 5, -2),
(30, 15, -2),
],
)
@pytest.mark.filterwarnings("ignore:.*OLC_FASTFEATURECOUNT*")
@pytest.mark.filterwarnings("ignore:.*OLCFastSetNextByIndex*")
def test_collection_iterator_items_slice(slice_dataset_path, args):
"""Test if c.items(start, stop, step) returns the correct features."""
start, stop, step = args
min_id = 0
max_id = 9
positions = list(range(min_id, max_id + 1))[start:stop:step]
with fiona.open(slice_dataset_path, "r") as c:
items = list(c.items(start, stop, step))
assert len(items) == len(positions)
record_positions = [int(item[1]["properties"]["position"]) for item in items]
for expected_position, record_position in zip(positions, record_positions):
assert expected_position == record_position
def test_collection_iterator_keys_next(path_coutwildrnp_shp):
with fiona.open(path_coutwildrnp_shp) as src:
k = next(src.keys(5, None))
assert k == 5
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