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# Copyright (C) 2012,2015 Codethink Limited
#
# 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; version 2 of the License.
#
# 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 savefile
class SaveFileTests(unittest.TestCase):
def cat(self, filename):
with open(filename) as f:
return f.read()
def mkfile(self, filename, contents):
with open(filename, 'w') as f:
f.write(contents)
def setUp(self):
self.tempdir = tempfile.mkdtemp()
self.basename = 'filename'
self.filename = os.path.join(self.tempdir, self.basename)
def tearDown(self):
shutil.rmtree(self.tempdir)
def test_there_are_no_files_initially(self):
self.assertEqual(os.listdir(self.tempdir), [])
def test_sets_real_filename(self):
f = savefile.SaveFile(self.filename, 'w')
self.assertEqual(f.real_filename, self.filename)
def test_sets_name_to_temporary_name(self):
f = savefile.SaveFile(self.filename, 'w')
self.assertNotEqual(f.name, self.filename)
def test_saves_new_file(self):
f = savefile.SaveFile(self.filename, 'w')
f.write('foo')
f.close()
self.assertEqual(os.listdir(self.tempdir), [self.basename])
self.assertEqual(self.cat(self.filename), 'foo')
def test_overwrites_existing_file(self):
self.mkfile(self.filename, 'yo!')
f = savefile.SaveFile(self.filename, 'w')
f.write('foo')
f.close()
self.assertEqual(os.listdir(self.tempdir), [self.basename])
self.assertEqual(self.cat(self.filename), 'foo')
def test_leaves_no_file_after_aborted_new_file(self):
f = savefile.SaveFile(self.filename, 'w')
f.write('foo')
f.abort()
self.assertEqual(os.listdir(self.tempdir), [])
def test_leaves_original_file_after_aborted_overwrite(self):
self.mkfile(self.filename, 'yo!')
f = savefile.SaveFile(self.filename, 'w')
f.write('foo')
f.abort()
self.assertEqual(os.listdir(self.tempdir), [self.basename])
self.assertEqual(self.cat(self.filename), 'yo!')
def test_saves_normally_with_with(self):
with savefile.SaveFile(self.filename, 'w') as f:
f.write('foo')
self.assertEqual(os.listdir(self.tempdir), [self.basename])
self.assertEqual(self.cat(self.filename), 'foo')
def test_saves_normally_with_exception_within_with(self):
try:
with savefile.SaveFile(self.filename, 'w') as f:
f.write('foo')
raise Exception()
except Exception:
pass
self.assertEqual(os.listdir(self.tempdir), [self.basename])
self.assertEqual(self.cat(self.filename), 'foo')
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