# coding=utf8

import os

from nose.tools import eq_

import mapnik

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('.'))

if 'sqlite' in mapnik.DatasourceCache.plugin_names():

# the negative buffer on the layer should

# override the postive map buffer leading

# only one point to be rendered in the map

def test_layer_buffer_size_1():

m = mapnik.Map(512, 512)

eq_(m.buffer_size, 0)

mapnik.load_map(m, '../data/good_maps/layer_buffer_size_reduction.xml')

eq_(m.buffer_size, 256)

eq_(m.layers[0].buffer_size, -150)

m.zoom_all()

im = mapnik.Image(m.width, m.height)

mapnik.render(m, im)

actual = '/tmp/mapnik-layer-buffer-size.png'

expected = 'images/support/mapnik-layer-buffer-size.png'

im.save(actual, "png32")

expected_im = mapnik.Image.open(expected)

eq_(im.tostring('png32'),

expected_im.tostring('png32'),

'failed comparing actual (%s) and expected (%s)' % (actual,

'tests/python_tests/' + expected))

if __name__ == "__main__":

setup()

exit(run_all(eval(x) for x in dir() if x.startswith("test_")))