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diff --git a/WebKitTools/Scripts/webkitpy/common/system/filesystem_mock.py b/WebKitTools/Scripts/webkitpy/common/system/filesystem_mock.py
deleted file mode 100644
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--- a/WebKitTools/Scripts/webkitpy/common/system/filesystem_mock.py
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@@ -1,80 +0,0 @@
-# Copyright (C) 2009 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.
-
-import errno
-import os
-import path
-
-
-class MockFileSystem(object):
- def __init__(self, files={}):
- """Initializes a "mock" filesystem that can be used to completely
- stub out a filesystem.
-
- Args:
- files: a dict of filenames -> file contents. A file contents
- value of None is used to indicate that the file should
- not exist.
- """
- self.files = files
-
- def exists(self, path):
- if path in self.files:
- return self.files[path] is not None
- return False
-
- def join(self, *comps):
- # os.path.join ignores trailing slashes on components (i.e.
- # join('foo/', 'bar') and join('foo', 'bar') produce the same result),
- # we emulate that behavior.
- trimmed_comps = []
- for comp in comps:
- if len(comp) and comp[-1] == '/':
- trimmed_comps.append(comp[0:-1])
- else:
- trimmed_comps.append(comp)
- return '/'.join(trimmed_comps)
-
- def maybe_make_directory(self, *path):
- # FIXME: Implement such that subsequent calls to isdir() work?
- pass
-
- def read_text_file(self, path):
- return self.read_binary_file(path)
-
- def read_binary_file(self, path):
- if path in self.files:
- if self.files[path] is None:
- raise IOError(errno.ENOENT, path, os.strerror(errno.ENOENT))
- return self.files[path]
-
- def write_text_file(self, path, contents):
- return self.write_binary_file(path, contents)
-
- def write_binary_file(self, path, contents):
- self.files[path] = contents