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import mapnik
import os
import pytest
try:
import itertools.izip as zip
except ImportError:
pass
from .utilities import execution_path
@pytest.fixture(scope="module")
def setup():
# All of the paths used are relative, if we run the tests
# from another directory we need to chdir()
os.chdir(execution_path('.'))
yield
def compare_shape_between_mapnik_and_ogr(shapefile, query=None):
if not os.path.exists(shapefile):
pytest.skip('Missing data')
plugins = mapnik.DatasourceCache.plugin_names()
if 'shape' in plugins and 'ogr' in plugins:
ds1 = mapnik.Ogr(file=shapefile, layer_by_index=0)
ds2 = mapnik.Shapefile(file=shapefile)
if query:
fs1 = ds1.features(query)
fs2 = ds2.features(query)
else:
fs1 = ds1.featureset()
fs2 = ds2.featureset()
count = 0
for feat1, feat2 in zip(fs1, fs2):
count += 1
assert feat1.id() == feat2.id(), '%s : ogr feature id %s "%s" does not equal shapefile feature id %s "%s"' % (count, feat1.id(), str(feat1.attributes), feat2.id(), str(feat2.attributes))
return True
def test_shapefile_line_featureset_id(setup):
compare_shape_between_mapnik_and_ogr('../data/shp/polylines.shp')
def test_shapefile_polygon_featureset_id():
compare_shape_between_mapnik_and_ogr('../data/shp/poly.shp')
def test_shapefile_polygon_feature_query_id():
if not os.path.exists('../data/shp/world_merc.shp'):
pytest.skip('Missing data')
bbox = (15523428.2632, 4110477.6323, -11218494.8310, 7495720.7404)
query = mapnik.Query(mapnik.Box2d(*bbox))
if 'ogr' in mapnik.DatasourceCache.plugin_names():
ds = mapnik.Ogr(file='../data/shp/world_merc.shp', layer_by_index=0)
for fld in ds.fields():
query.add_property_name(fld)
compare_shape_between_mapnik_and_ogr(
'../data/shp/world_merc.shp', query)
def test_feature_hit_count():
if not os.path.exists('../data/shp/world_merc.shp'):
pytest.skip('Missing data')
# results in different results between shp and ogr!
#bbox = (-14284551.8434, 2074195.1992, -7474929.8687, 8140237.7628)
bbox = (1113194.91,4512803.085,2226389.82,6739192.905)
query = mapnik.Query(mapnik.Box2d(*bbox))
if 'ogr' in mapnik.DatasourceCache.plugin_names():
ds1 = mapnik.Ogr(file='../data/shp/world_merc.shp',layer_by_index=0)
for fld in ds1.fields():
query.add_property_name(fld)
ds2 = mapnik.Shapefile(file='../data/shp/world_merc.shp')
count1 = len(list(ds1.features(query)))
count2 = len(list(ds2.features(query)))
assert count1 < count2 # expected 17 and 20
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