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# Copyright 2011 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/>.
import os
import shutil
import tempfile
import unittest
import genbackupdatalib
class NameGeneratorTests(unittest.TestCase):
def setUp(self):
self.tempdir = tempfile.mkdtemp()
self.depth = 2
self.max = 3
self.names = self.new()
def tearDown(self):
shutil.rmtree(self.tempdir)
def new(self):
return genbackupdatalib.NameGenerator(self.tempdir, self.depth,
self.max)
def test_generates_name_that_is_inside_target_directory(self):
name = self.names.new()
self.assert_(name.startswith(self.tempdir + os.sep))
def test_generates_different_names_every_time(self):
names = set(self.names.new() for i in range(10))
self.assertEqual(len(names), 10)
def test_generates_names_that_do_not_exist(self):
for i in range(10):
name = self.names.new()
self.assertFalse(os.path.exists(name))
def test_generates_the_same_sequence_with_every_instance(self):
n = 10
first = [self.names.new() for i in range(n)]
names2 = self.new()
second = [names2.new() for i in range(n)]
self.assertEqual(first, second)
def test_does_not_generate_names_of_existing_files(self):
name = self.names.new()
os.makedirs(os.path.dirname(name))
file(name, 'w').close()
names2 = self.new()
name2 = names2.new()
self.assertNotEqual(name, name2)
self.assertFalse(os.path.exists(name2))
def test_converts_file_sequence_number_into_right_path_tuple(self):
self.assertEqual(self.names._path_tuple(0), (0, 0, 0))
self.assertEqual(self.names._path_tuple(1), (0, 0, 1))
self.assertEqual(self.names._path_tuple(2), (0, 0, 2))
self.assertEqual(self.names._path_tuple(3), (0, 1, 0))
self.assertEqual(self.names._path_tuple(4), (0, 1, 1))
self.assertEqual(self.names._path_tuple(5), (0, 1, 2))
self.assertEqual(self.names._path_tuple(6), (0, 2, 0))
self.assertEqual(self.names._path_tuple(9), (1, 0, 0))
self.assertEqual(self.names._path_tuple(18), (2, 0, 0))
self.assertEqual(self.names._path_tuple(27), (3, 0, 0))
def test_returns_1tuple_for_depth_zero(self):
names = genbackupdatalib.NameGenerator(self.tempdir, 0, 1)
self.assertEqual(names._path_tuple(42), (42,))
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