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# vim: set fileencoding=utf-8 :
# Copyright (C) 2010 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# NOTE: The fileencoding comment on the first line of the file is
# important; without it, Python will choke while trying to parse the file,
# since it includes non-ASCII characters.
from __future__ import with_statement
import os
import stat
import sys
import tempfile
import unittest
from filesystem import FileSystem
class FileSystemTest(unittest.TestCase):
def setUp(self):
self._this_dir = os.path.dirname(os.path.abspath(__file__))
self._missing_file = os.path.join(self._this_dir, 'missing_file.py')
self._this_file = os.path.join(self._this_dir, 'filesystem_unittest.py')
def test_chdir(self):
fs = FileSystem()
cwd = fs.getcwd()
newdir = '/'
if sys.platform == 'win32':
newdir = 'c:\\'
fs.chdir(newdir)
self.assertEquals(fs.getcwd(), newdir)
fs.chdir(cwd)
def test_chdir__notexists(self):
fs = FileSystem()
newdir = '/dirdoesnotexist'
if sys.platform == 'win32':
newdir = 'c:\\dirdoesnotexist'
self.assertRaises(OSError, fs.chdir, newdir)
def test_exists__true(self):
fs = FileSystem()
self.assertTrue(fs.exists(self._this_file))
def test_exists__false(self):
fs = FileSystem()
self.assertFalse(fs.exists(self._missing_file))
def test_getcwd(self):
fs = FileSystem()
self.assertTrue(fs.exists(fs.getcwd()))
def test_isdir__true(self):
fs = FileSystem()
self.assertTrue(fs.isdir(self._this_dir))
def test_isdir__false(self):
fs = FileSystem()
self.assertFalse(fs.isdir(self._this_file))
def test_join(self):
fs = FileSystem()
self.assertEqual(fs.join('foo', 'bar'),
os.path.join('foo', 'bar'))
def test_listdir(self):
fs = FileSystem()
with fs.mkdtemp(prefix='filesystem_unittest_') as d:
self.assertEqual(fs.listdir(d), [])
new_file = os.path.join(d, 'foo')
fs.write_text_file(new_file, u'foo')
self.assertEqual(fs.listdir(d), ['foo'])
os.remove(new_file)
def test_maybe_make_directory__success(self):
fs = FileSystem()
with fs.mkdtemp(prefix='filesystem_unittest_') as base_path:
sub_path = os.path.join(base_path, "newdir")
self.assertFalse(os.path.exists(sub_path))
self.assertFalse(fs.isdir(sub_path))
fs.maybe_make_directory(sub_path)
self.assertTrue(os.path.exists(sub_path))
self.assertTrue(fs.isdir(sub_path))
# Make sure we can re-create it.
fs.maybe_make_directory(sub_path)
self.assertTrue(os.path.exists(sub_path))
self.assertTrue(fs.isdir(sub_path))
# Clean up.
os.rmdir(sub_path)
self.assertFalse(os.path.exists(base_path))
self.assertFalse(fs.isdir(base_path))
def test_maybe_make_directory__failure(self):
# FIXME: os.chmod() doesn't work on Windows to set directories
# as readonly, so we skip this test for now.
if sys.platform in ('win32', 'cygwin'):
return
fs = FileSystem()
with fs.mkdtemp(prefix='filesystem_unittest_') as d:
# Remove write permissions on the parent directory.
os.chmod(d, stat.S_IRUSR)
# Now try to create a sub directory - should fail.
sub_dir = fs.join(d, 'subdir')
self.assertRaises(OSError, fs.maybe_make_directory, sub_dir)
# Clean up in case the test failed and we did create the
# directory.
if os.path.exists(sub_dir):
os.rmdir(sub_dir)
def test_read_and_write_file(self):
fs = FileSystem()
text_path = None
binary_path = None
unicode_text_string = u'Ūnĭcōde̽'
hex_equivalent = '\xC5\xAA\x6E\xC4\xAD\x63\xC5\x8D\x64\x65\xCC\xBD'
try:
text_path = tempfile.mktemp(prefix='tree_unittest_')
binary_path = tempfile.mktemp(prefix='tree_unittest_')
fs.write_text_file(text_path, unicode_text_string)
contents = fs.read_binary_file(text_path)
self.assertEqual(contents, hex_equivalent)
fs.write_text_file(binary_path, hex_equivalent)
text_contents = fs.read_text_file(binary_path)
self.assertEqual(text_contents, unicode_text_string)
except:
if text_path:
os.remove(text_path)
if binary_path:
os.remove(binary_path)
def test_read_binary_file__missing(self):
fs = FileSystem()
self.assertRaises(IOError, fs.read_binary_file, self._missing_file)
def test_read_text_file__missing(self):
fs = FileSystem()
self.assertRaises(IOError, fs.read_text_file, self._missing_file)
def test_remove_file_with_retry(self):
FileSystemTest._remove_failures = 2
def remove_with_exception(filename):
FileSystemTest._remove_failures -= 1
if FileSystemTest._remove_failures >= 0:
try:
raise WindowsError
except NameError:
raise FileSystem._WindowsError
fs = FileSystem()
self.assertTrue(fs.remove('filename', remove_with_exception))
self.assertEquals(-1, FileSystemTest._remove_failures)
def test_sep(self):
fs = FileSystem()
self.assertEquals(fs.sep, os.sep)
self.assertEquals(fs.join("foo", "bar"),
os.path.join("foo", "bar"))
def test_sep__is_readonly(self):
def assign_sep():
fs.sep = ' '
fs = FileSystem()
self.assertRaises(AttributeError, assign_sep)
if __name__ == '__main__':
unittest.main()
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