Add test_constance module

import os

from io import StringIO

from opds_catalog.management.commands import sopds_util

from constance import config

from django.core.management import call_command

from django.test import TestCase

from opds_catalog import zipf as zipfile

class constanceTestCase(TestCase):

    test_module_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

    test_ROOTLIB = os.path.join(test_module_path, 'tests/data')

    def setUp(self):

        pass

    def test_constance_attributes_count(self):

        out = StringIO()

        call_command('constance', 'list', stdout=out)

        out.seek(0)

        self.assertEquals(out.getvalue().count('\n'), 35)

        out.close()

    def test_constance_set_get_attr(self):

        conf_value = 'test_temp_dir'

        call_command('constance', 'set', 'SOPDS_TEMP_DIR', conf_value)

        self.assertEquals(config.SOPDS_TEMP_DIR, conf_value)

        out = StringIO()

        call_command('constance', 'get', 'SOPDS_TEMP_DIR', stdout=out)

        out.seek(0)

        self.assertEquals(out.getvalue().strip(), conf_value)

        out.close()