save_map_test.py

#!/usr/bin/env python

import glob
import os
import tempfile

from nose.tools import eq_

import mapnik

from .utilities import execution_path, run_all, datasources_available


default_logging_severity = mapnik.logger.get_severity()


def setup():
    # make the tests silent to suppress unsupported params from harfbuzz tests
    # TODO: remove this after harfbuzz branch merges
    mapnik.logger.set_severity(getattr(mapnik.severity_type, "None"))
    # All of the paths used are relative, if we run the tests
    # from another directory we need to chdir()
    os.chdir(execution_path('.'))


def teardown():
    mapnik.logger.set_severity(default_logging_severity)


def compare_map(xmlfile):
    missing_plugins = set()
    have_inputs = datasources_available(xmlfile, missing_plugins)
    if not have_inputs:
        print 'Notice: skipping saved map comparison for %s due to unavailable input plugins: %s' % (os.path.basename(xmlfile), list(missing_plugins))
        return False

    m = mapnik.Map(256, 256)
    absolute_base = os.path.abspath(os.path.dirname(xmlfile))
    mapnik.load_map(m, xmlfile, False, absolute_base)
    (handle, test_map) = tempfile.mkstemp(
        suffix='.xml', prefix='mapnik-temp-map1-')
    os.close(handle)
    (handle, test_map2) = tempfile.mkstemp(
        suffix='.xml', prefix='mapnik-temp-map2-')
    os.close(handle)
    if os.path.exists(test_map):
        os.remove(test_map)
    mapnik.save_map(m, test_map)
    new_map = mapnik.Map(256, 256)
    mapnik.load_map(new_map, test_map, False, absolute_base)
    with open(test_map2, 'w') as f:
        f.write(mapnik.save_map_to_string(new_map))
    diff = ' diff -u %s %s' % (os.path.abspath(test_map),
                               os.path.abspath(test_map2))
    try:
        with open(test_map) as f1:
            with open(test_map2) as f2:
                eq_(f1.read(), f2.read())
    except AssertionError as e:
        raise AssertionError(
            'serialized map "%s" not the same after being reloaded, \ncompare with command:\n\n$%s' %
            (xmlfile, diff))

    if os.path.exists(test_map):
        os.remove(test_map)
    else:
        # Fail, the map wasn't written
        return False


def test_compare_map():
    good_maps = glob.glob("../data/good_maps/*.xml")
    good_maps = [os.path.normpath(p) for p in good_maps]
    for m in good_maps:
        compare_map(m)

    for m in glob.glob("../visual_tests/styles/*.xml"):
        compare_map(m)

# TODO - enforce that original xml does not equal first saved xml


def test_compare_map_deprecations():
    dep = glob.glob("../data/deprecated_maps/*.xml")
    dep = [os.path.normpath(p) for p in dep]
    for m in dep:
        compare_map(m)

if __name__ == "__main__":
    setup()
    exit(run_all(eval(x) for x in dir() if x.startswith("test_")))