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# Copyright (C) 2005 by Canonical Ltd
# Authors: Robert Collins <robert.collins@canonical.com>
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""These tests are tests about the source code of bzrlib itself.
They are useful for testing code quality, checking coverage metric etc.
"""
# import system imports here
import os
import sys
#import bzrlib specific imports here
from bzrlib.tests import TestCase
import bzrlib.branch
class TestApiUsage(TestCase):
def find_occurences(self, rule, filename):
"""Find the number of occurences of rule in a file."""
occurences = 0
source = file(filename, 'r')
for line in source:
if line.find(rule) > -1:
occurences += 1
return occurences
def source_file_name(self, package):
"""Return the path of the .py file for package."""
path = package.__file__
if path[-1] in 'co':
return path[:-1]
else:
return path
def test_branch_working_tree(self):
"""Test that the number of uses of working_tree in branch is stable."""
occurences = self.find_occurences('self.working_tree()',
self.source_file_name(bzrlib.branch))
# do not even think of increasing this number. If you think you need to
# increase it, then you almost certainly are doing something wrong as
# the relationship from working_tree to branch is one way.
# Note that this is an exact equality so that when the number drops,
#it is not given a buffer but rather has this test updated immediately.
self.assertEqual(0, occurences)
def test_branch_WorkingTree(self):
"""Test that the number of uses of working_tree in branch is stable."""
occurences = self.find_occurences('WorkingTree',
self.source_file_name(bzrlib.branch))
# do not even think of increasing this number. If you think you need to
# increase it, then you almost certainly are doing something wrong as
# the relationship from working_tree to branch is one way.
# This number should be 4 (import NoWorkingTree and WorkingTree,
# raise NoWorkingTree from working_tree(), and construct a working tree
# there) but a merge that regressed this was done before this test was
# written. Note that this is an exact equality so that when the number
# drops, it is not given a buffer but rather this test updated
# immediately.
self.assertEqual(4, occurences)
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