blob: b45ea8e37409a766009e1afbb4e10b0dad357a3b [file] [log] [blame]
# Copyright (c) 2011 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import errno
import fnmatch
import os
import re
import StringIO
def _RaiseNotFound(path):
raise IOError(errno.ENOENT, path, os.strerror(errno.ENOENT))
class MockFileSystem(object):
"""Stripped-down version of WebKit's webkitpy.common.system.filesystem_mock
Implements a filesystem-like interface on top of a dict of filenames ->
file contents. A file content value of None indicates that the file should
not exist (IOError will be raised if it is opened;
reading from a missing key raises a KeyError, not an IOError."""
def __init__(self, files=None):
self.files = files or {}
self.written_files = {}
self._sep = '/'
def sep(self):
return self._sep
def _split(self, path):
return path.rsplit(self.sep, 1)
def abspath(self, path):
if path.endswith(self.sep):
return path[:-1]
return path
def basename(self, path):
if self.sep not in path:
return ''
return self._split(path)[-1] or self.sep
def dirname(self, path):
if self.sep not in path:
return ''
return self._split(path)[0] or self.sep
def exists(self, path):
return self.isfile(path) or self.isdir(path)
def isabs(self, path):
return path.startswith(self.sep)
def isfile(self, path):
return path in self.files and self.files[path] is not None
def isdir(self, path):
if path in self.files:
return False
if not path.endswith(self.sep):
path += self.sep
# We need to use a copy of the keys here in order to avoid switching
# to a different thread and potentially modifying the dict in
# mid-iteration.
files = self.files.keys()[:]
return any(f.startswith(path) for f in files)
def join(self, *comps):
# TODO: Might want tests for this and/or a better comment about how
# it works.
return re.sub(re.escape(os.path.sep), self.sep, os.path.join(*comps))
def glob(self, path):
return fnmatch.filter(self.files.keys(), path)
def open_for_reading(self, path):
return StringIO.StringIO(self.read_binary_file(path))
def read_binary_file(self, path):
# Intentionally raises KeyError if we don't recognize the path.
if self.files[path] is None:
return self.files[path]
def relpath(path, base):
# This implementation is wrong in many ways; assert to check them for now.
assert path.startswith(base)
assert base.endswith('/')
return path[len(base):]