# Copyright (C) 2018  Lars Wirzenius
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import shutil
import tempfile
import unittest

import muck


class PersistentStoreTests(unittest.TestCase):

    def setUp(self):
        self.tempdir = tempfile.mkdtemp()
        self.ps = muck.PersistentStore(self.tempdir)

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

    def test_initially_loads_empty_memory_store(self):
        ms = self.ps.load_memory_store()
        self.assertEqual(len(ms), 0)

    def test_appends_to_change_log(self):
        meta = {
            'id': 'id-1',
            'rev': 'rev-1',
        }
        res = {
            'foo': 'bar',
        }

        chg = muck.CreateChange(meta, res)
        self.ps.append_change(chg)

        ms = self.ps.load_memory_store()
        self.assertEqual(len(ms), 1)
        self.assertEqual(
            ms.as_dict(),
            {
                'id-1': (meta, res),
            })