mapnik/tests/python_tests/ogr_and_shape_geometries_test.py

#!/usr/bin/env python

from nose.tools import *

from utilities import execution_path, Todo

import os, sys, glob, mapnik

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('.'))

# TODO - fix truncation in shapefile...
polys = ["POLYGON ((30 10, 10 20, 20 40, 40 40, 30 10))",
         "POLYGON ((35 10, 10 20, 15 40, 45 45, 35 10),(20 30, 35 35, 30 20, 20 30))",
         "MULTIPOLYGON (((30 20, 10 40, 45 40, 30 20)),((15 5, 40 10, 10 20, 5 10, 15 5)))"
         "MULTIPOLYGON (((40 40, 20 45, 45 30, 40 40)),((20 35, 45 20, 30 5, 10 10, 10 30, 20 35),(30 20, 20 25, 20 15, 30 20)))"
        ]

plugins = mapnik.DatasourceCache.instance().plugin_names()
if 'shape' in plugins and 'ogr' in plugins:

    def ensure_geometries_are_interpreted_equivalently(filename):
        ds1 = mapnik.Ogr(file=filename,layer_by_index=0)
        ds2 = mapnik.Shapefile(file=filename)
        fs1 = ds1.featureset()
        fs2 = ds2.featureset()
        count = 0;
        while(True):
            count += 1
            feat1 = fs1.next()
            feat2 = fs2.next()
            if not feat1:
                break
            eq_(str(feat1),str(feat2))
            eq_(feat1.geometries().to_wkt(),feat2.geometries().to_wkt())
            eq_(feat1.geometries().to_wkb(mapnik.wkbByteOrder.NDR),feat2.geometries().to_wkb(mapnik.wkbByteOrder.NDR))
            eq_(feat1.geometries().to_wkb(mapnik.wkbByteOrder.XDR),feat2.geometries().to_wkb(mapnik.wkbByteOrder.XDR))

    def test_simple_polys():
        ensure_geometries_are_interpreted_equivalently('../data/shp/wkt_poly.shp')

if __name__ == "__main__":
    setup()
    [eval(run)() for run in dir() if 'test_' in run]