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"""
This module has the mock object definitions used to hold reference geometry
for the GEOS and GDAL tests.
"""
import json
import os
from django.utils import six
from django.utils._os import upath
from django.utils.functional import cached_property
# Path where reference test data is located.
TEST_DATA = os.path.join(os.path.dirname(upath(__file__)), 'data')
def tuplize(seq):
"Turn all nested sequences to tuples in given sequence."
if isinstance(seq, (list, tuple)):
return tuple(tuplize(i) for i in seq)
return seq
def strconvert(d):
"Converts all keys in dictionary to str type."
return {str(k): v for k, v in six.iteritems(d)}
def get_ds_file(name, ext):
return os.path.join(TEST_DATA,
name,
name + '.%s' % ext
)
class TestObj(object):
"""
Base testing object, turns keyword args into attributes.
"""
def __init__(self, **kwargs):
for key, value in kwargs.items():
setattr(self, key, value)
class TestDS(TestObj):
"""
Object for testing GDAL data sources.
"""
def __init__(self, name, **kwargs):
# Shapefile is default extension, unless specified otherwise.
ext = kwargs.pop('ext', 'shp')
self.ds = get_ds_file(name, ext)
super(TestDS, self).__init__(**kwargs)
class TestGeom(TestObj):
"""
Testing object used for wrapping reference geometry data
in GEOS/GDAL tests.
"""
def __init__(self, **kwargs):
# Converting lists to tuples of certain keyword args
# so coordinate test cases will match (JSON has no
# concept of tuple).
coords = kwargs.pop('coords', None)
if coords:
self.coords = tuplize(coords)
centroid = kwargs.pop('centroid', None)
if centroid:
self.centroid = tuple(centroid)
ext_ring_cs = kwargs.pop('ext_ring_cs', None)
if ext_ring_cs:
ext_ring_cs = tuplize(ext_ring_cs)
self.ext_ring_cs = ext_ring_cs
super(TestGeom, self).__init__(**kwargs)
class TestGeomSet(object):
"""
Each attribute of this object is a list of `TestGeom` instances.
"""
def __init__(self, **kwargs):
for key, value in kwargs.items():
setattr(self, key, [TestGeom(**strconvert(kw)) for kw in value])
class TestDataMixin(object):
"""
Mixin used for GEOS/GDAL test cases that defines a `geometries`
property, which returns and/or loads the reference geometry data.
"""
@cached_property
def geometries(self):
# Load up the test geometry data from fixture into global.
with open(os.path.join(TEST_DATA, 'geometries.json')) as f:
geometries = json.load(f)
return TestGeomSet(**strconvert(geometries))
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