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# Copyright (C) 2008 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
from cStringIO import StringIO
class FakeReadFile(object):
"""A file-like object that can be given predefined content and read
like a file. The maximum size and number of the reads is recorded."""
def __init__(self, data):
"""Initialize the mock file object with the provided data."""
self.data = StringIO(data)
self.max_read_size = None
self.read_count = 0
def read(self, size=-1):
"""Reads size characters from the input (or the rest of the string if
size is -1)."""
data = self.data.read(size)
self.max_read_size = max(self.max_read_size, len(data))
self.read_count += 1
return data
def get_max_read_size(self):
"""Returns the maximum read size or None if no reads have occured."""
return self.max_read_size
def get_read_count(self):
"""Returns the number of calls to read."""
return self.read_count
def reset_read_count(self):
"""Clears the read count."""
self.read_count = 0
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