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import sys
import os, mapnik
from timeit import Timer, time
from nose.tools import *
from utilities import execution_path, run_all
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_clearing_image_data():
im = mapnik.Image(256,256)
# make sure it equals itself
bytes = im.tostring()
eq_(im.tostring(),bytes)
# set background, then clear
im.background = mapnik.Color('green')
eq_(im.tostring()!=bytes,True)
# clear image, should now equal original
im.clear()
eq_(im.tostring(),bytes)
def make_map():
ds = mapnik.MemoryDatasource()
context = mapnik.Context()
context.push('Name')
pixel_key = 1
f = mapnik.Feature(context,pixel_key)
f['Name'] = str(pixel_key)
f.add_geometries_from_wkt('POLYGON ((0 0, 0 256, 256 256, 256 0, 0 0))')
ds.add_feature(f)
s = mapnik.Style()
r = mapnik.Rule()
symb = mapnik.PolygonSymbolizer()
r.symbols.append(symb)
s.rules.append(r)
lyr = mapnik.Layer('Places')
lyr.datasource = ds
lyr.styles.append('places_labels')
width,height = 256,256
m = mapnik.Map(width,height)
m.append_style('places_labels',s)
m.layers.append(lyr)
m.zoom_all()
return m
def test_clearing_grid_data():
g = mapnik.Grid(256,256)
utf = g.encode()
# make sure it equals itself
eq_(g.encode(),utf)
m = make_map()
mapnik.render_layer(m,g,layer=0,fields=['__id__','Name'])
eq_(g.encode()!=utf,True)
# clear grid, should now match original
g.clear()
eq_(g.encode(),utf)
if __name__ == "__main__":
setup()
run_all(eval(x) for x in dir() if x.startswith("test_"))
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