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from __future__ import unicode_literals
import os
import shutil
import tempfile
import unittest
from fs import osfs
from fs.memoryfs import MemoryFS
from fs.path import relpath
from fs.subfs import SubFS
from .test_osfs import TestOSFS
class TestSubFS(TestOSFS):
"""Test OSFS implementation."""
def setUp(self):
self.temp_dir = tempfile.mkdtemp("fstest")
self.parent_fs = osfs.OSFS(self.temp_dir)
self.parent_fs.makedir("__subdir__")
self.fs = self.parent_fs.opendir("__subdir__")
def tearDown(self):
shutil.rmtree(self.temp_dir)
self.parent_fs.close()
self.fs.close()
def _get_real_path(self, path):
_path = os.path.join(self.temp_dir, "__subdir__", relpath(path))
return _path
class CustomSubFS(SubFS):
"""Just a custom class to change the type"""
def custom_function(self, custom_path):
fs, delegate_path = self.delegate_path(custom_path)
fs.custom_function(delegate_path)
class CustomSubFS2(SubFS):
"""Just a custom class to change the type"""
class CustomFS(MemoryFS):
subfs_class = CustomSubFS
def __init__(self):
super(CustomFS, self).__init__()
self.custom_path = None
def custom_function(self, custom_path):
self.custom_path = custom_path
class TestCustomSubFS(unittest.TestCase):
"""Test customization of the SubFS returned from opendir etc"""
def test_opendir(self):
fs = CustomFS()
fs.makedir("__subdir__")
subfs = fs.opendir("__subdir__")
# By default, you get the fs's defined custom SubFS
assert isinstance(subfs, CustomSubFS)
subfs.custom_function("filename")
assert fs.custom_path == "/__subdir__/filename"
# Providing the factory explicitly still works
subfs = fs.opendir("__subdir__", factory=CustomSubFS2)
assert isinstance(subfs, CustomSubFS2)
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