new_contents: # -*- coding: utf-8 -*-
  #
  # Copyright 2014 Thomas Amland <thomas.amland@gmail.com>
  #
  # 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.
  
  import os
  import pytest
  from functools import partial
  from .shell import mkdtemp, mkdir, touch, mv
  from watchdog.utils.dirsnapshot import DirectorySnapshot
  from watchdog.utils.dirsnapshot import DirectorySnapshotDiff
  from watchdog.utils import platform
  
  
  skip_if_windows = pytest.mark.skipif(platform.is_windows(),
                        reason="Can't detect moves on windows file systems")
  
  
  @pytest.fixture()
  def tmpdir():
      return mkdtemp()
  
  
  @pytest.fixture()
  def p(tmpdir, *args):
      """
      Convenience function to join the temporary directory path
      with the provided arguments.
      """
      return partial(os.path.join, tmpdir)
  
  
  def test_move_to(p):
      mkdir(p('dir1'))
      mkdir(p('dir2'))
      touch(p('dir1', 'a'))
      ref = DirectorySnapshot(p('dir2'))
      mv(p('dir1/a'), p('dir2/b'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('dir2')))
      assert diff.files_created == [p('dir2/b')]
  
  
  def test_move_from(p):
      mkdir(p('dir1'))
      mkdir(p('dir2'))
      touch(p('dir1', 'a'))
      ref = DirectorySnapshot(p('dir1'))
      mv(p('dir1/a'), p('dir2/b'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('dir1')))
      assert diff.files_deleted == [p('dir1/a')]
  
  
  @pytest.mark.skipif(not platform.is_windows(), reason="Should detect moves instead")
  def test_move_on_windows(p):
      touch(p('a'))
      ref = DirectorySnapshot(p(''))
      mv(p('a'), p('b'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('')))
      assert diff.files_created == [p('b')]
      assert diff.files_deleted == [p('a')]
  
  
  @skip_if_windows
  def test_move_internal(p):
      mkdir(p('dir1'))
      mkdir(p('dir2'))
      touch(p('dir1', 'a'))
      ref = DirectorySnapshot(p(''))
      mv(p('dir1/a'), p('dir2/b'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('')))
      assert diff.files_moved == [(p('dir1/a'), p('dir2/b'))]
      assert diff.files_created == []
      assert diff.files_deleted == []
      assert diff.files_modified == []
  
  
  @skip_if_windows
  def test_move_replace(p):
      mkdir(p('dir1'))
      mkdir(p('dir2'))
      touch(p('dir1', 'a'))
      touch(p('dir1', 'b'))
      ref = DirectorySnapshot(p(''))
      mv(p('dir1/a'), p('dir2/b'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('')))
      assert diff.files_moved == [(p('dir1/a'), p('dir2/b'))]
      assert diff.files_deleted == [p('dir2/b')]
      assert diff.files_created == []
      assert diff.files_modified == []
  
  
  def test_dir_modify_on_create(p):
      ref = DirectorySnapshot(p(''))
      touch(p('a'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('')))
      assert diff.dirs_modified == [p('')]
  
  
  def test_dir_modify_on_move(p):
      mkdir(p('dir1'))
      mkdir(p('dir2'))
      touch(p('dir1', 'a'))
      ref = DirectorySnapshot(p(''))
      mv(p('dir1/a'), p('dir2/b'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('')))
      assert set(diff.dirs_modified) == set([p('dir1'), p('dir2')])
  
  
  @skip_if_windows
  def test_detect_modify_on_moved(p):
      touch(p('a'))
      ref = DirectorySnapshot(p(''))
      touch(p('a'))
      mv(p('a'), p('b'))
      diff = DirectorySnapshotDiff(ref, DirectorySnapshot(p('')))
      assert diff.files_moved == [(p('a'), p('b'))]
      assert diff.files_modified == [p('b')]
  
subject: add tests for known issues with snapshot