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# test_file.py -- Test for git files
# Copyright (C) 2010 Google, Inc.
#
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
# Dulwich is dual-licensed under the Apache License, Version 2.0 and the GNU
# General Public License as published by the Free Software Foundation; version 2.0
# or (at your option) any later version. You can redistribute it and/or
# modify it under the terms of either of these two licenses.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# You should have received a copy of the licenses; if not, see
# <http://www.gnu.org/licenses/> for a copy of the GNU General Public License
# and <http://www.apache.org/licenses/LICENSE-2.0> for a copy of the Apache
# License, Version 2.0.
#
import io
import os
import shutil
import sys
import tempfile
from dulwich.file import FileLocked, GitFile, _fancy_rename
from . import SkipTest, TestCase
class FancyRenameTests(TestCase):
def setUp(self) -> None:
super().setUp()
self._tempdir = tempfile.mkdtemp()
self.foo = self.path("foo")
self.bar = self.path("bar")
self.create(self.foo, b"foo contents")
def tearDown(self) -> None:
shutil.rmtree(self._tempdir)
super().tearDown()
def path(self, filename):
return os.path.join(self._tempdir, filename)
def create(self, path, contents) -> None:
f = open(path, "wb")
f.write(contents)
f.close()
def test_no_dest_exists(self) -> None:
self.assertFalse(os.path.exists(self.bar))
_fancy_rename(self.foo, self.bar)
self.assertFalse(os.path.exists(self.foo))
new_f = open(self.bar, "rb")
self.assertEqual(b"foo contents", new_f.read())
new_f.close()
def test_dest_exists(self) -> None:
self.create(self.bar, b"bar contents")
_fancy_rename(self.foo, self.bar)
self.assertFalse(os.path.exists(self.foo))
new_f = open(self.bar, "rb")
self.assertEqual(b"foo contents", new_f.read())
new_f.close()
def test_dest_opened(self) -> None:
if sys.platform != "win32":
raise SkipTest("platform allows overwriting open files")
self.create(self.bar, b"bar contents")
dest_f = open(self.bar, "rb")
self.assertRaises(OSError, _fancy_rename, self.foo, self.bar)
dest_f.close()
self.assertTrue(os.path.exists(self.path("foo")))
new_f = open(self.foo, "rb")
self.assertEqual(b"foo contents", new_f.read())
new_f.close()
new_f = open(self.bar, "rb")
self.assertEqual(b"bar contents", new_f.read())
new_f.close()
class GitFileTests(TestCase):
def setUp(self) -> None:
super().setUp()
self._tempdir = tempfile.mkdtemp()
f = open(self.path("foo"), "wb")
f.write(b"foo contents")
f.close()
def tearDown(self) -> None:
shutil.rmtree(self._tempdir)
super().tearDown()
def path(self, filename):
return os.path.join(self._tempdir, filename)
def test_invalid(self) -> None:
foo = self.path("foo")
self.assertRaises(IOError, GitFile, foo, mode="r")
self.assertRaises(IOError, GitFile, foo, mode="ab")
self.assertRaises(IOError, GitFile, foo, mode="r+b")
self.assertRaises(IOError, GitFile, foo, mode="w+b")
self.assertRaises(IOError, GitFile, foo, mode="a+bU")
def test_readonly(self) -> None:
f = GitFile(self.path("foo"), "rb")
self.assertIsInstance(f, io.IOBase)
self.assertEqual(b"foo contents", f.read())
self.assertEqual(b"", f.read())
f.seek(4)
self.assertEqual(b"contents", f.read())
f.close()
def test_default_mode(self) -> None:
f = GitFile(self.path("foo"))
self.assertEqual(b"foo contents", f.read())
f.close()
def test_write(self) -> None:
foo = self.path("foo")
foo_lock = f"{foo}.lock"
orig_f = open(foo, "rb")
self.assertEqual(orig_f.read(), b"foo contents")
orig_f.close()
self.assertFalse(os.path.exists(foo_lock))
f = GitFile(foo, "wb")
self.assertFalse(f.closed)
self.assertRaises(AttributeError, getattr, f, "not_a_file_property")
self.assertTrue(os.path.exists(foo_lock))
f.write(b"new stuff")
f.seek(4)
f.write(b"contents")
f.close()
self.assertFalse(os.path.exists(foo_lock))
new_f = open(foo, "rb")
self.assertEqual(b"new contents", new_f.read())
new_f.close()
def test_open_twice(self) -> None:
foo = self.path("foo")
f1 = GitFile(foo, "wb")
f1.write(b"new")
try:
f2 = GitFile(foo, "wb")
self.fail()
except FileLocked:
pass
else:
f2.close()
f1.write(b" contents")
f1.close()
# Ensure trying to open twice doesn't affect original.
f = open(foo, "rb")
self.assertEqual(b"new contents", f.read())
f.close()
def test_abort(self) -> None:
foo = self.path("foo")
foo_lock = f"{foo}.lock"
orig_f = open(foo, "rb")
self.assertEqual(orig_f.read(), b"foo contents")
orig_f.close()
f = GitFile(foo, "wb")
f.write(b"new contents")
f.abort()
self.assertTrue(f.closed)
self.assertFalse(os.path.exists(foo_lock))
new_orig_f = open(foo, "rb")
self.assertEqual(new_orig_f.read(), b"foo contents")
new_orig_f.close()
def test_abort_close(self) -> None:
foo = self.path("foo")
f = GitFile(foo, "wb")
f.abort()
try:
f.close()
except OSError:
self.fail()
f = GitFile(foo, "wb")
f.close()
try:
f.abort()
except OSError:
self.fail()
def test_abort_close_removed(self) -> None:
foo = self.path("foo")
f = GitFile(foo, "wb")
f._file.close()
os.remove(foo + ".lock")
f.abort()
self.assertTrue(f._closed)
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