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#!/usr/bin/env python
from nose.tools import *
import os
from nose.tools import *
from utilities import execution_path
import mapnik2
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('.'))
def test_adding_datasource_to_layer():
map_string = '''<?xml version="1.0" encoding="utf-8"?>
<Map>
<Layer name="world_borders">
<StyleName>world_borders_style</StyleName>
<StyleName>point_style</StyleName>
<!-- leave datasource empty -->
<!--
<Datasource>
<Parameter name="file">../data/shp/world_merc.shp</Parameter>
<Parameter name="type">shape</Parameter>
</Datasource>
-->
</Layer>
</Map>
'''
m = mapnik2.Map(256, 256)
mapnik2.load_map_from_string(m, map_string)
# validate it loaded fine
eq_(m.layers[0].styles[0],'world_borders_style')
eq_(m.layers[0].styles[1],'point_style')
eq_(len(m.layers),1)
# also assign a variable reference to that layer
# below we will test that this variable references
# the same object that is attached to the map
lyr = m.layers[0]
# ensure that there was no datasource for the layer...
eq_(m.layers[0].datasource,None)
eq_(lyr.datasource,None)
# also note that since the srs was black it defaulted to wgs84
eq_(m.layers[0].srs,'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
eq_(lyr.srs,'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
# now add a datasource one...
ds = mapnik2.Shapefile(file='../data/shp/world_merc.shp')
m.layers[0].datasource = ds
# now ensure it is attached
eq_(m.layers[0].datasource.name(),"shape")
eq_(lyr.datasource.name(),"shape")
# and since we have now added a shapefile in spherical mercator, adjust the projection
lyr.srs = '+proj=merc +lon_0=0 +lat_ts=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs'
# test that assignment
eq_(m.layers[0].srs,'+proj=merc +lon_0=0 +lat_ts=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs')
eq_(lyr.srs,'+proj=merc +lon_0=0 +lat_ts=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs')
if __name__ == "__main__":
setup()
[eval(run)() for run in dir() if 'test_' in run]
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