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# Copyright Cartopy Contributors
#
# This file is part of Cartopy and is released under the LGPL license.
# See COPYING and COPYING.LESSER in the root of the repository for full
# licensing details.
from __future__ import (absolute_import, division, print_function)
import cartopy.feature as cfeature
import pytest
small_extent = (-6, -8, 56, 59)
medium_extent = (-20, 20, 20, 60)
large_extent = (-40, 40, 0, 80)
auto_scaler = cfeature.AdaptiveScaler('110m', (('50m', 50), ('10m', 15)))
auto_land = cfeature.NaturalEarthFeature('physical', 'land', auto_scaler)
class TestFeatures(object):
def test_change_scale(self):
# Check that features can easily be retrieved with a different
# scale.
new_lakes = cfeature.LAKES.with_scale('10m')
assert new_lakes.scale == '10m'
assert new_lakes.kwargs == cfeature.LAKES.kwargs
assert new_lakes.category == cfeature.LAKES.category
assert new_lakes.name == cfeature.LAKES.name
def test_scale_from_extent(self):
# Check that scaler.scale_from_extent returns the appropriate
# scales.
small_scale = auto_land.scaler.scale_from_extent(small_extent)
medium_scale = auto_land.scaler.scale_from_extent(medium_extent)
large_scale = auto_land.scaler.scale_from_extent(large_extent)
assert small_scale == '10m'
assert medium_scale == '50m'
assert large_scale == '110m'
def test_intersecting_geometries_small(self, monkeypatch):
# Patch so we don't actually try to download anything.
monkeypatch.setattr(auto_land, 'geometries', lambda: [])
# Check that intersecting_geometries will set the scale to
# '10m' when the extent is small and autoscale is True.
auto_land.intersecting_geometries(small_extent)
assert auto_land.scale == '10m'
def test_intersecting_geometries_medium(self, monkeypatch):
# Patch so we don't actually try to download anything.
monkeypatch.setattr(auto_land, 'geometries', lambda: [])
# Check that intersecting_geometries will set the scale to
# '50m' when the extent is medium and autoscale is True.
auto_land.intersecting_geometries(medium_extent)
assert auto_land.scale == '50m'
def test_intersecting_geometries_large(self, monkeypatch):
# Patch so we don't actually try to download anything.
monkeypatch.setattr(auto_land, 'geometries', lambda: [])
# Check that intersecting_geometries will set the scale to
# '110m' when the extent is large and autoscale is True.
auto_land.intersecting_geometries(large_extent)
assert auto_land.scale == '110m'
def test_bad_ne_scale():
with pytest.raises(ValueError, match='not a valid Natural Earth scale'):
cfeature.NaturalEarthFeature('physical', 'land', '30m')
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