import os

import mapnik

import pytest

from .utilities import execution_path

@pytest.fixture(scope="module")

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('.'))

yield

def test_introspect_symbolizers(setup):

# create a symbolizer

p = mapnik.PointSymbolizer()

p.file = "../data/images/dummy.png"

p.allow_overlap = True

p.opacity = 0.5

assert p.allow_overlap == True

assert p.opacity == 0.5

assert str(p.file) == '../data/images/dummy.png'

# make sure the defaults

# are what we think they are

assert p.allow_overlap == True

assert p.opacity == 0.5

assert str(p.file) == '../data/images/dummy.png'

# contruct objects to hold it

r = mapnik.Rule()

r.symbolizers.append(p)

s = mapnik.Style()

s.rules.append(r)

m = mapnik.Map(0, 0)

m.append_style('s', s)

# try to figure out what is

# in the map and make sure

# style is there and the same

s2 = m.find_style('s')

rules = s2.rules

assert len(rules) == 1

r2 = rules[0]

syms = r2.symbolizers

assert len(syms) == 1

# TODO here, we can do...

sym = syms[0]

p2 = sym.extract()

assert isinstance(p2, mapnik.PointSymbolizer)

assert p2.allow_overlap == True

assert p2.opacity == 0.5

assert str(p2.file) == '../data/images/dummy.png'