75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
#!/usr/bin/env python
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import os
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from nose.tools import *
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from utilities import execution_path, run_all
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import mapnik
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def setup():
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# All of the paths used are relative, if we run the tests
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# from another directory we need to chdir()
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os.chdir(execution_path('.'))
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def test_adding_datasource_to_layer():
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map_string = '''<?xml version="1.0" encoding="utf-8"?>
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<Map>
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<Layer name="world_borders">
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<StyleName>world_borders_style</StyleName>
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<StyleName>point_style</StyleName>
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<!-- leave datasource empty -->
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<!--
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<Datasource>
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<Parameter name="file">../data/shp/world_merc.shp</Parameter>
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<Parameter name="type">shape</Parameter>
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</Datasource>
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-->
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</Layer>
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</Map>
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'''
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m = mapnik.Map(256, 256)
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try:
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mapnik.load_map_from_string(m, map_string)
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# validate it loaded fine
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eq_(m.layers[0].styles[0],'world_borders_style')
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eq_(m.layers[0].styles[1],'point_style')
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eq_(len(m.layers),1)
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# also assign a variable reference to that layer
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# below we will test that this variable references
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# the same object that is attached to the map
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lyr = m.layers[0]
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# ensure that there was no datasource for the layer...
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eq_(m.layers[0].datasource,None)
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eq_(lyr.datasource,None)
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# also note that since the srs was black it defaulted to wgs84
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eq_(m.layers[0].srs,'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
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eq_(lyr.srs,'+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
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# now add a datasource one...
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ds = mapnik.Shapefile(file='../data/shp/world_merc.shp')
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m.layers[0].datasource = ds
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# now ensure it is attached
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eq_(m.layers[0].datasource.describe()['name'],"shape")
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eq_(lyr.datasource.describe()['name'],"shape")
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# and since we have now added a shapefile in spherical mercator, adjust the projection
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lyr.srs = '+proj=merc +lon_0=0 +lat_ts=0 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs'
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# test that assignment
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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')
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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')
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except RuntimeError, e:
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# only test datasources that we have installed
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if not 'Could not create datasource' in str(e):
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raise RuntimeError(e)
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if __name__ == "__main__":
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setup()
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exit(run_all(eval(x) for x in dir() if x.startswith("test_")))
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