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# Copyright (C) 2005, 2006, 2008 Canonical Ltd
# Authors: Robert Collins <robert.collins@canonical.com>
# and others
#
# 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 parser
import re
from cStringIO import StringIO
import symbol
import sys
import token
#import bzrlib specific imports here
from bzrlib import (
diff,
osutils,
patiencediff,
textfile,
)
import bzrlib.branch
from bzrlib.tests import (
KnownFailure,
TestCase,
TestSkipped,
)
from bzrlib.workingtree import WorkingTree
# Files which are listed here will be skipped when testing for Copyright (or
# GPL) statements.
COPYRIGHT_EXCEPTIONS = ['bzrlib/lsprof.py']
LICENSE_EXCEPTIONS = ['bzrlib/lsprof.py']
# Technically, 'bzrlib/lsprof.py' should be 'bzrlib/util/lsprof.py',
# (we do not check bzrlib/util/, since that is code bundled from elsewhere)
# but for compatibility with previous releases, we don't want to move it.
def check_coding_style(old_filename, oldlines, new_filename, newlines, to_file,
allow_binary=False, sequence_matcher=None,
path_encoding='utf8'):
"""text_differ to be passed to diff.DiffText, which checks code style """
if allow_binary is False:
textfile.check_text_lines(oldlines)
textfile.check_text_lines(newlines)
if sequence_matcher is None:
sequence_matcher = patiencediff.PatienceSequenceMatcher
started = [False] #trick to access parent scoped variable
def start_if_needed():
if not started[0]:
to_file.write('+++ %s\n' % new_filename)
started[0] = True
def check_newlines(j1, j2):
for i, line in enumerate(newlines[j1:j2]):
bad_ws_match = re.match(r'^(([\t]*)(.*?)([\t ]*))(\r?\n)?$', line)
if bad_ws_match:
line_content = bad_ws_match.group(1)
has_leading_tabs = bool(bad_ws_match.group(2))
has_trailing_whitespace = bool(bad_ws_match.group(4))
if has_leading_tabs:
start_if_needed()
to_file.write('line %i has leading tabs: "%s"\n'% (
i+1+j1, line_content))
if has_trailing_whitespace:
start_if_needed()
to_file.write('line %i has trailing whitespace: "%s"\n'% (
i+1+j1, line_content))
if len(line_content) > 79:
print (
'\nFile %s\nline %i is longer than 79 characters:'
'\n"%s"'% (new_filename, i+1+j1, line_content))
for group in sequence_matcher(None, oldlines, newlines
).get_grouped_opcodes(0):
for tag, i1, i2, j1, j2 in group:
if tag == 'replace' or tag == 'insert':
check_newlines(j1, j2)
if len(newlines) == j2 and not newlines[j2-1].endswith('\n'):
start_if_needed()
to_file.write("\\ No newline at end of file\n")
class TestSourceHelper(TestCase):
def source_file_name(self, package):
"""Return the path of the .py file for package."""
if getattr(sys, "frozen", None) is not None:
raise TestSkipped("can't test sources in frozen distributions.")
path = package.__file__
if path[-1] in 'co':
return path[:-1]
else:
return path
class TestApiUsage(TestSourceHelper):
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 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.
# As of 20070809, there are no longer any mentions at all.
self.assertEqual(0, occurences)
class TestSource(TestSourceHelper):
def get_bzrlib_dir(self):
"""Get the path to the root of bzrlib"""
source = self.source_file_name(bzrlib)
source_dir = os.path.dirname(source)
# Avoid the case when bzrlib is packaged in a zip file
if not os.path.isdir(source_dir):
raise TestSkipped('Cannot find bzrlib source directory. Expected %s'
% source_dir)
return source_dir
def get_source_files(self):
"""Yield all source files for bzr and bzrlib
:param our_files_only: If true, exclude files from included libraries
or plugins.
"""
bzrlib_dir = self.get_bzrlib_dir()
# This is the front-end 'bzr' script
bzr_path = self.get_bzr_path()
yield bzr_path
for root, dirs, files in os.walk(bzrlib_dir):
for d in dirs:
if d.endswith('.tmp'):
dirs.remove(d)
for f in files:
if not f.endswith('.py'):
continue
yield osutils.pathjoin(root, f)
def get_source_file_contents(self):
for fname in self.get_source_files():
f = open(fname, 'rb')
try:
text = f.read()
finally:
f.close()
yield fname, text
def is_our_code(self, fname):
"""Return true if it's a "real" part of bzrlib rather than external code"""
if '/util/' in fname or '/plugins/' in fname:
return False
else:
return True
def is_copyright_exception(self, fname):
"""Certain files are allowed to be different"""
if not self.is_our_code(fname):
# We don't ask that external utilities or plugins be
# (C) Canonical Ltd
return True
for exc in COPYRIGHT_EXCEPTIONS:
if fname.endswith(exc):
return True
return False
def is_license_exception(self, fname):
"""Certain files are allowed to be different"""
if not self.is_our_code(fname):
return True
for exc in LICENSE_EXCEPTIONS:
if fname.endswith(exc):
return True
return False
def test_tmpdir_not_in_source_files(self):
"""When scanning for source files, we don't descend test tempdirs"""
for filename in self.get_source_files():
if re.search(r'test....\.tmp', filename):
self.fail("get_source_file() returned filename %r "
"from within a temporary directory"
% filename)
def test_copyright(self):
"""Test that all .py files have a valid copyright statement"""
# These are files which contain a different copyright statement
# and that is okay.
incorrect = []
copyright_re = re.compile('#\\s*copyright.*(?=\n)', re.I)
copyright_canonical_re = re.compile(
r'# Copyright \(C\) ' # Opening "# Copyright (C)"
r'(\d+)(, \d+)*' # Followed by a series of dates
r'.*Canonical Ltd' # And containing 'Canonical Ltd'
)
for fname, text in self.get_source_file_contents():
if self.is_copyright_exception(fname):
continue
match = copyright_canonical_re.search(text)
if not match:
match = copyright_re.search(text)
if match:
incorrect.append((fname, 'found: %s' % (match.group(),)))
else:
incorrect.append((fname, 'no copyright line found\n'))
else:
if 'by Canonical' in match.group():
incorrect.append((fname,
'should not have: "by Canonical": %s'
% (match.group(),)))
if incorrect:
help_text = ["Some files have missing or incorrect copyright"
" statements.",
"",
"Please either add them to the list of"
" COPYRIGHT_EXCEPTIONS in"
" bzrlib/tests/test_source.py",
# this is broken to prevent a false match
"or add '# Copyright (C)"
" 2007 Canonical Ltd' to these files:",
"",
]
for fname, comment in incorrect:
help_text.append(fname)
help_text.append((' '*4) + comment)
self.fail('\n'.join(help_text))
def test_gpl(self):
"""Test that all .py files have a GPL disclaimer"""
incorrect = []
gpl_txt = """
# 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
"""
gpl_re = re.compile(re.escape(gpl_txt), re.MULTILINE)
for fname, text in self.get_source_file_contents():
if self.is_license_exception(fname):
continue
if not gpl_re.search(text):
incorrect.append(fname)
if incorrect:
help_text = ['Some files have missing or incomplete GPL statement',
"",
"Please either add them to the list of"
" LICENSE_EXCEPTIONS in"
" bzrlib/tests/test_source.py",
"Or add the following text to the beginning:",
gpl_txt
]
for fname in incorrect:
help_text.append((' '*4) + fname)
self.fail('\n'.join(help_text))
def test_no_tabs(self):
"""bzrlib source files should not contain any tab characters."""
incorrect = []
for fname, text in self.get_source_file_contents():
if not self.is_our_code(fname):
continue
if '\t' in text:
incorrect.append(fname)
if incorrect:
self.fail('Tab characters were found in the following source files.'
'\nThey should either be replaced by "\\t" or by spaces:'
'\n\n %s'
% ('\n '.join(incorrect)))
def test_coding_style(self):
""" Check if bazaar code conforms to some coding style conventions.
Currently we check all .py files for:
* new trailing white space
* new leading tabs
* new long lines (give warning only)
* no newline at end of files
"""
bzr_dir = osutils.dirname(self.get_bzrlib_dir())
try:
wt = WorkingTree.open(bzr_dir)
except:
raise TestSkipped(
'Could not open bazaar working tree %s'
% bzr_dir)
diff_output = StringIO()
wt.lock_read()
try:
new_tree = wt
old_tree = new_tree.basis_tree()
old_tree.lock_read()
new_tree.lock_read()
try:
iterator = new_tree.iter_changes(old_tree)
for (file_id, paths, changed_content, versioned, parent,
name, kind, executable) in iterator:
if (changed_content and paths[1].endswith('.py')):
if kind == ('file', 'file'):
diff_text = diff.DiffText(old_tree, new_tree,
to_file=diff_output,
text_differ=check_coding_style)
diff_text.diff(file_id, paths[0], paths[1],
kind[0], kind[1])
else:
check_coding_style(name[0], (), name[1],
new_tree.get_file(file_id).readlines(),
diff_output)
finally:
old_tree.unlock()
new_tree.unlock()
finally:
wt.unlock()
if len(diff_output.getvalue()) > 0:
self.fail("Unacceptable coding style:\n" + diff_output.getvalue())
def test_no_asserts(self):
"""bzr shouldn't use the 'assert' statement."""
# assert causes too much variation between -O and not, and tends to
# give bad errors to the user
def search(x):
# scan down through x for assert statements, report any problems
# this is a bit cheesy; it may get some false positives?
if x[0] == symbol.assert_stmt:
return True
elif x[0] == token.NAME:
# can't search further down
return False
for sub in x[1:]:
if sub and search(sub):
return True
return False
badfiles = []
for fname, text in self.get_source_file_contents():
if not self.is_our_code(fname):
continue
ast = parser.ast2tuple(parser.suite(''.join(text)))
if search(ast):
badfiles.append(fname)
if badfiles:
self.fail(
"these files contain an assert statement and should not:\n%s"
% '\n'.join(badfiles))
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