129 lines
3.8 KiB
Python
129 lines
3.8 KiB
Python
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# Copyright (C) 2010
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# Red Hat, Inc. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Author(s): Martin Sivak <msivak@redhat.com>
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from StringIO import StringIO
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import fnmatch
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import os
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class DiskIO(object):
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"""Simple object to simplify mocking of file operations in Mock
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based testing"""
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class TestFile(StringIO):
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def __init__(self, store, path, content = ""):
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StringIO.__init__(self, content)
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self._store = store
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self._path = path
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self._ro = False
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def flush(self):
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self._store[self._path] = self.getvalue()
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def close(self):
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self.flush()
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return StringIO.close(self)
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def __del__(self):
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try:
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self.close()
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except (AttributeError, ValueError):
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pass
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def __enter__(self):
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return self
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def __exit__(self, *_):
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self.close()
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class Dir(object):
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pass
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class Link(object):
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pass
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def __init__(self):
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self.reset()
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def __getitem__(self, key):
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return self.fs[key]
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def __setitem__(self, key, value):
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self.fs[key] = value
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def reset(self):
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self.fs = {
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"/proc": self.Dir,
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"/proc/cmdline": "linux",
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}
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self._pwd = "/"
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#Emulate file objects
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def open(self, filename, mode = "r"):
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path = os.path.join(self._pwd, filename)
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content = self.fs.get(path, None)
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if content == self.Dir:
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raise IOError("[Errno 21] Is a directory: '%s'" % (path))
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elif mode.startswith("w"):
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self.fs[path] = ""
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f = self.TestFile(self.fs, path, self.fs[path])
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elif mode.endswith("a"):
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if not path in self.fs:
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self.fs[path] = ""
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f = self.TestFile(self.fs, path, self.fs[path])
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f.seek(0, os.SEEK_END)
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elif content == None:
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raise IOError("[Errno 2] No such file or directory: '%s'" % (path,))
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elif mode.endswith("+"):
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f = self.TestFile(self.fs, path, content)
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if mode.startswith('r'):
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f.seek(0, os.SEEK_SET)
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else:
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f.seek(0, os.SEEK_END)
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else:
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f = self.TestFile(self.fs, path, content)
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return f
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#Emulate os calls
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def glob_glob(self, pattern):
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return fnmatch.filter(self.fs.keys(), pattern)
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def os_listdir(self, path):
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return [entry[len(path):].lstrip('/') for entry in self.fs.keys()\
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if entry.startswith(path) and entry != path]
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def os_path_exists(self, path):
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path = os.path.join(self._pwd, path)
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return self.fs.has_key(path)
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def os_path_isdir(self, path):
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if not path.endswith("/"):
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path += "/"
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path += "*"
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return len(fnmatch.filter(self.fs.keys(), path)) > 0
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def os_remove(self, path):
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path = os.path.join(self._pwd, path)
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try:
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del self.fs[path]
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except KeyError:
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raise OSError("[Errno 2] No such file or directory: '%s'" % (path,))
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def os_access(self, path, mode):
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return self.os_path_exists(path)
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