# Copyright 2017  Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=


import shutil
import tempfile
import unittest

import yarnutils


class VariablesTests(unittest.TestCase):

    def setUp(self):
        self.tempdir = tempfile.mkdtemp()

    def tearDown(self):
        shutil.rmtree(self.tempdir)

    def test_unset_variable_is_None(self):
        vars = yarnutils.Variables(self.tempdir)
        self.assertEqual(vars['foo'], None)

    def test_set_value_is_persistent(self):
        vars1 = yarnutils.Variables(self.tempdir)
        vars1['foo'] = 'bar'
        vars2 = yarnutils.Variables(self.tempdir)
        self.assertEqual(vars1['foo'], vars2['foo'])
        self.assertEqual(vars2['foo'], 'bar')