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helpers.py
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helpers.py
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import fnmatch
import os
from os import chdir
import os.path
from shutil import rmtree, Error, copy2, copystat
import socket
from subprocess import check_call, CalledProcessError, PIPE, Popen
from tempfile import mkdtemp
from unittest import TestCase
from nose.plugins.skip import SkipTest
try:
HOST = socket.gethostbyname('localhost')
except socket.error:
HOST = 'localhost'
###########
### copytree and ignore_patterns copied from py2.6 source to be usable in py2.5
### Copyright PSF and under Python license
###########
def ignore_patterns(*patterns):
"""Function that can be used as copytree() ignore parameter.
Patterns is a sequence of glob-style patterns
that are used to exclude files"""
def _ignore_patterns(path, names):
ignored_names = []
for pattern in patterns:
ignored_names.extend(fnmatch.filter(names, pattern))
return set(ignored_names)
return _ignore_patterns
def copytree(src, dst, symlinks=False, ignore=None):
"""Recursively copy a directory tree using copy2().
The destination directory must not already exist.
If exception(s) occur, an Error is raised with a list of reasons.
If the optional symlinks flag is true, symbolic links in the
source tree result in symbolic links in the destination tree; if
it is false, the contents of the files pointed to by symbolic
links are copied.
The optional ignore argument is a callable. If given, it
is called with the `src` parameter, which is the directory
being visited by copytree(), and `names` which is the list of
`src` contents, as returned by os.listdir():
callable(src, names) -> ignored_names
Since copytree() is called recursively, the callable will be
called once for each directory that is copied. It returns a
list of names relative to the `src` directory that should
not be copied.
XXX Consider this example code rather than the ultimate tool.
"""
names = os.listdir(src)
if ignore is not None:
ignored_names = ignore(src, names)
else:
ignored_names = set()
os.makedirs(dst)
errors = []
for name in names:
if name in ignored_names:
continue
srcname = os.path.join(src, name)
dstname = os.path.join(dst, name)
try:
if symlinks and os.path.islink(srcname):
linkto = os.readlink(srcname)
os.symlink(linkto, dstname)
elif os.path.isdir(srcname):
copytree(srcname, dstname, symlinks, ignore)
else:
copy2(srcname, dstname)
# XXX What about devices, sockets etc.?
except (IOError, os.error), why:
errors.append((srcname, dstname, str(why)))
# catch the Error from the recursive copytree so that we can
# continue with other files
except Error, err:
errors.extend(err.args[0])
try:
copystat(src, dst)
except OSError, why:
if WindowsError is not None and isinstance(why, WindowsError):
# Copying file access times may fail on Windows
pass
else:
errors.extend((src, dst, str(why)))
if errors:
raise Error, errors
class MongoTestCase(TestCase):
def setUp(self):
try:
from pymongo.errors import ConnectionFailure
from citools.mongo import get_mongo_and_database_connections
except ImportError, e:
import traceback as t
raise SkipTest("Error when importing dependencies (pymongo not installed?): %s" % t.format_exc())
connection_arguments = {
"hostname" : os.environ.get("MONGODB_HOSTNAME", "localhost"),
"database" : os.environ.get("MONGODB_DATABASE_NAME", "test_citools")
}
if os.environ.get("MONGODB_PORT", None):
connection_arguments['port'] = os.environ.get("MONGODB_PORT", None)
if os.environ.get("MONGODB_USERNAME", None):
connection_arguments['username'] = os.environ.get("MONGODB_USERNAME", None)
if os.environ.get("MONGODB_PASSWORD", None):
connection_arguments['password'] = os.environ.get("MONGODB_PASSWORD", None)
try:
self.database, self.connection = get_mongo_and_database_connections(
**connection_arguments
)
except ConnectionFailure:
raise SkipTest("Cannot connect to mongo database, check your settings")
def tearDown(self):
self.connection.drop_database(self.database)
class PaverTestCase(TestCase):
"""
This is true integration test and is kind of creepy.
It will take example project in expected layout, placed in test/exproject,
copy it in temporary environment, where it will be taken under git version control.
Also provide handy functions to create commits for further version tests.
"""
def setUp(self):
super(PaverTestCase, self).setUp()
self.oldcwd = os.getcwd()
self.example_project_source = os.path.abspath(os.path.join(os.path.dirname(__file__), 'exproject'))
if not self.example_project_source:
raise ValueError("Cannot find example project, WTF?")
try:
check_call(['git', '--help'], stdout=PIPE, stderr=PIPE)
except (CalledProcessError, OSError):
raise SkipTest("git must be available and in $PATH in order to preform this test")
self.holder = mkdtemp(prefix='test-repository-')
self.repo = os.path.abspath(os.path.join(self.holder, 'exproject'))
copytree(self.example_project_source, self.repo, ignore=ignore_patterns('*.pyc', '*.pyo'))
chdir(self.repo)
check_call(['git', 'init'], cwd=self.repo, stdout=PIPE, stderr=PIPE)
# configure me
check_call(['git', 'config', 'user.email', 'testcase@example.com'], cwd=self.repo)
check_call(['git', 'config', 'user.name', 'Testing Testorz'], cwd=self.repo, stdout=PIPE, stderr=PIPE)
check_call(['git', 'add', '*'], cwd=self.repo)
check_call(['git', 'commit', '-a', '-m', "Initial project import"], cwd=self.repo, stdout=PIPE, stderr=PIPE)
def tearDown(self):
os.chdir(self.oldcwd)
rmtree(self.holder)
super(PaverTestCase, self).setUp()
try:
#######
### FTPd, thread-based wrapper around pyftpdlib's ftpserver
### taken from pyftpdlib test suite. See http://code.google.com/p/pyftpdlib/
### Copyright Giampaolo Rodola <g.rodola@gmail.com>
### Distributed under MIT license
### __init__ args added by Almad <bugs@almad.net>
#######
from pyftpdlib import ftpserver
import threading
class FTPd(threading.Thread):
"""A threaded FTP server used for running tests.
This is basically a modified version of the FTPServer class which
wraps the polling loop into a thread.
The instance returned can be used to start(), stop() and
eventually re-start() the server.
"""
handler = ftpserver.FTPHandler
def __init__(self, host=HOST, port=0, verbose=False, user='test', passwd='test', home='/tmp'):
threading.Thread.__init__(self)
self.__serving = False
self.__stopped = False
self.__lock = threading.Lock()
self.__flag = threading.Event()
if not verbose:
ftpserver.log = ftpserver.logline = lambda x: x
authorizer = ftpserver.DummyAuthorizer()
authorizer.add_user(user, passwd, home, perm='elradfmw') # full perms
authorizer.add_anonymous(home)
self.handler.authorizer = authorizer
self.server = ftpserver.FTPServer((host, port), self.handler)
self.host, self.port = self.server.socket.getsockname()[:2]
def __repr__(self):
status = [self.__class__.__module__ + "." + self.__class__.__name__]
if self.__serving:
status.append('active')
else:
status.append('inactive')
status.append('%s:%s' % self.server.socket.getsockname()[:2])
return '<%s at %#x>' % (' '.join(status), id(self))
def start(self, timeout=0.01, use_poll=False, map=None):
"""Start serving until an explicit stop() request.
Polls for shutdown every 'timeout' seconds.
"""
if self.__serving:
raise RuntimeError("Server already started")
if self.__stopped:
# ensure the server can be started again
FTPd.__init__(self, self.server.socket.getsockname(), self.handler)
self.__timeout = timeout
self.__use_poll = use_poll
self.__map = map
threading.Thread.start(self)
self.__flag.wait()
def run(self):
self.__serving = True
self.__flag.set()
while self.__serving:
self.__lock.acquire()
self.server.serve_forever(timeout=self.__timeout, count=1,
use_poll=self.__use_poll, map=self.__map)
self.__lock.release()
self.server.close_all(ignore_all=True)
def stop(self):
"""Stop serving (also disconnecting all currently connected
clients) by telling the serve_forever() loop to stop and
waits until it does.
"""
if not self.__serving:
raise RuntimeError("Server not started yet")
self.__serving = False
self.__stopped = True
self.join()
except ImportError:
pass
class GitTestCase(TestCase):
def _create_git_repository(self):
# create temporary directory and initialize git repository there
self.repo = mkdtemp(prefix='test_git_')
self.oldcwd = os.getcwd()
os.chdir(self.repo)
proc = Popen(['git', 'init'], stdout=PIPE, stdin=PIPE)
proc.wait()
self.assertEquals(0, proc.returncode)
# also setup dummy name / email for this repo for tag purposes
proc = Popen(['git', 'config', 'user.name', 'dummy-tester'])
proc.wait()
self.assertEquals(0, proc.returncode)
proc = Popen(['git', 'config', 'user.email', 'dummy-tester@example.com'])
proc.wait()
self.assertEquals(0, proc.returncode)
def do_piped_command_for_success(self, command):
proc = Popen(command, stdout=PIPE, stdin=PIPE, stderr=PIPE)
stdout, stderr = proc.communicate()
self.assertEquals(0, proc.returncode)
return (stdout, stderr)
def commit(self, message='dummy'):
""" Commmit into repository and return commited revision """
self.do_piped_command_for_success(['git', 'commit', '-a', '-m', '%s' % message])
stdout = self.do_piped_command_for_success(['git', 'rev-parse', 'HEAD'])[0]
return stdout.strip()
def tearDown(self):
TestCase.tearDown(self)
# delete temporary repository and restore ENV vars after update
rmtree(self.repo)
os.chdir(self.oldcwd)
class BuildTestCase(PaverTestCase, GitTestCase):
PROJECT_VERSION_TAG = '3.3'
def setUp(self):
PaverTestCase.setUp(self)
check_call(['git', 'tag', '-a', 'exproject-%s' % self.PROJECT_VERSION_TAG, '-m', '"Tagging"'])
def tearDown(self):
PaverTestCase.tearDown(self)