# Copyright 2009 Google Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# 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.
"""Tests that ensure that the `tempfile` module works with `fake_filesystem`
if using `Patcher` (via `fake_filesystem_unittest`).
"""
import os
import stat
import tempfile
import unittest
from pyfakefs import fake_filesystem_unittest
class FakeTempfileModuleTest(fake_filesystem_unittest.TestCase):
"""Test the 'tempfile' module with the fake file system."""
def setUp(self):
self.setUpPyfakefs()
def test_named_temporary_file(self):
obj = tempfile.NamedTemporaryFile()
self.assertTrue(self.fs.get_object(obj.name))
obj.close()
with self.assertRaises(OSError):
self.fs.get_object(obj.name)
def test_named_temporary_file_no_delete(self):
obj = tempfile.NamedTemporaryFile(delete=False)
obj.write(b"foo")
obj.close()
file_obj = self.fs.get_object(obj.name)
contents = file_obj.contents
self.assertEqual("foo", contents)
obj = tempfile.NamedTemporaryFile(mode="w", encoding="utf8", delete=False)
obj.write("foo")
obj.close()
file_obj = self.fs.get_object(obj.name)
self.assertEqual("foo", file_obj.contents)
def test_mkstemp(self):
next_fd = len(self.fs.open_files)
temporary = tempfile.mkstemp()
self.assertEqual(2, len(temporary))
self.assertTrue(
temporary[1].startswith(os.path.join(tempfile.gettempdir(), "tmp"))
)
self.assertEqual(next_fd, temporary[0])
self.assertTrue(self.fs.exists(temporary[1]))
mode = 0o666 if self.fs.is_windows_fs else 0o600
self.assertEqual(self.fs.get_object(temporary[1]).st_mode, stat.S_IFREG | mode)
fh = os.fdopen(temporary[0], "w+b")
self.assertEqual(temporary[0], fh.fileno())
def test_mkstemp_dir(self):
"""test tempfile.mkstemp(dir=)."""
# expect fail: /dir does not exist
with self.assertRaises(OSError):
tempfile.mkstemp(dir="/dir")
# expect pass: /dir exists
self.fs.create_dir("/dir")
next_fd = len(self.fs.open_files)
temporary = tempfile.mkstemp(dir="/dir")
self.assertEqual(2, len(temporary))
self.assertEqual(next_fd, temporary[0])
self.assertTrue(
temporary[1].startswith(os.path.join(self.fs.root_dir_name, "dir", "tmp"))
)
self.assertTrue(self.fs.exists(temporary[1]))
mode = 0o666 if self.fs.is_windows_fs else 0o600
self.assertEqual(self.fs.get_object(temporary[1]).st_mode, stat.S_IFREG | mode)
def test_mkdtemp(self):
dirname = tempfile.mkdtemp()
self.assertTrue(dirname)
self.assertTrue(self.fs.exists(dirname))
self.assertEqual(self.fs.get_object(dirname).st_mode, stat.S_IFDIR | 0o700)
def test_temporary_directory(self):
with tempfile.TemporaryDirectory() as tmpdir:
self.assertTrue(tmpdir)
self.assertTrue(self.fs.exists(tmpdir))
self.assertEqual(self.fs.get_object(tmpdir).st_mode, stat.S_IFDIR | 0o700)
def test_temporary_file(self):
with tempfile.TemporaryFile() as f:
f.write(b"test")
f.seek(0)
self.assertEqual(b"test", f.read())
def test_temporay_file_with_dir(self):
with self.assertRaises(FileNotFoundError):
tempfile.TemporaryFile(dir="/parent")
os.mkdir("/parent")
with tempfile.TemporaryFile() as f:
f.write(b"test")
f.seek(0)
self.assertEqual(b"test", f.read())
if __name__ == "__main__":
unittest.main()
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