qemu-iotests: add iotests Python module
Block layer tests that involve QMP commands rather than qemu-img or qemu-io are not well-suited for shell scripting. This patch adds a Python module which allows tests to be written in Python instead. The basic API is: VM - class for launching and interacting with a VM QMPTestCase - abstract base class for tests that use QMP qemu_img() - wrapper function for invoking qemu-img qemu_io() - wrapper function for invoking qemu-io imgfmt - the image format under test (e.g. qcow2, qed) test_dir - scratch directory path for temporary files main() - entry point for running tests Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi
Kevin Wolf
parent
049255b60c
commit
f345cfd019
|
|
@ -0,0 +1,164 @@
|
|||
# Common utilities and Python wrappers for qemu-iotests
|
||||
#
|
||||
# Copyright (C) 2012 IBM Corp.
|
||||
#
|
||||
# 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, see <http://www.gnu.org/licenses/>.
|
||||
#
|
||||
|
||||
import os
|
||||
import re
|
||||
import subprocess
|
||||
import unittest
|
||||
import sys; sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'QMP'))
|
||||
import qmp
|
||||
|
||||
__all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
|
||||
'VM', 'QMPTestCase', 'notrun', 'main']
|
||||
|
||||
# This will not work if arguments or path contain spaces but is necessary if we
|
||||
# want to support the override options that ./check supports.
|
||||
qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').split(' ')
|
||||
qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').split(' ')
|
||||
qemu_args = os.environ.get('QEMU', 'qemu').split(' ')
|
||||
|
||||
imgfmt = os.environ.get('IMGFMT', 'raw')
|
||||
imgproto = os.environ.get('IMGPROTO', 'file')
|
||||
test_dir = os.environ.get('TEST_DIR', '/var/tmp')
|
||||
|
||||
def qemu_img(*args):
|
||||
'''Run qemu-img and return the exit code'''
|
||||
devnull = open('/dev/null', 'r+')
|
||||
return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
|
||||
|
||||
def qemu_io(*args):
|
||||
'''Run qemu-io and return the stdout data'''
|
||||
args = qemu_io_args + list(args)
|
||||
return subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
|
||||
|
||||
class VM(object):
|
||||
'''A QEMU VM'''
|
||||
|
||||
def __init__(self):
|
||||
self._monitor_path = os.path.join(test_dir, 'qemu-mon.%d' % os.getpid())
|
||||
self._qemu_log_path = os.path.join(test_dir, 'qemu-log.%d' % os.getpid())
|
||||
self._args = qemu_args + ['-chardev',
|
||||
'socket,id=mon,path=' + self._monitor_path,
|
||||
'-mon', 'chardev=mon,mode=control', '-nographic']
|
||||
self._num_drives = 0
|
||||
|
||||
def add_drive(self, path, opts=''):
|
||||
'''Add a virtio-blk drive to the VM'''
|
||||
options = ['if=virtio',
|
||||
'format=%s' % imgfmt,
|
||||
'cache=none',
|
||||
'file=%s' % path,
|
||||
'id=drive%d' % self._num_drives]
|
||||
if opts:
|
||||
options.append(opts)
|
||||
|
||||
self._args.append('-drive')
|
||||
self._args.append(','.join(options))
|
||||
self._num_drives += 1
|
||||
return self
|
||||
|
||||
def launch(self):
|
||||
'''Launch the VM and establish a QMP connection'''
|
||||
devnull = open('/dev/null', 'rb')
|
||||
qemulog = open(self._qemu_log_path, 'wb')
|
||||
try:
|
||||
self._qmp = qmp.QEMUMonitorProtocol(self._monitor_path, server=True)
|
||||
self._popen = subprocess.Popen(self._args, stdin=devnull, stdout=qemulog,
|
||||
stderr=subprocess.STDOUT)
|
||||
self._qmp.accept()
|
||||
except:
|
||||
os.remove(self._monitor_path)
|
||||
raise
|
||||
|
||||
def shutdown(self):
|
||||
'''Terminate the VM and clean up'''
|
||||
self._qmp.cmd('quit')
|
||||
self._popen.wait()
|
||||
os.remove(self._monitor_path)
|
||||
os.remove(self._qemu_log_path)
|
||||
|
||||
def qmp(self, cmd, **args):
|
||||
'''Invoke a QMP command and return the result dict'''
|
||||
return self._qmp.cmd(cmd, args=args)
|
||||
|
||||
def get_qmp_events(self, wait=False):
|
||||
'''Poll for queued QMP events and return a list of dicts'''
|
||||
events = self._qmp.get_events(wait=wait)
|
||||
self._qmp.clear_events()
|
||||
return events
|
||||
|
||||
index_re = re.compile(r'([^\[]+)\[([^\]]+)\]')
|
||||
|
||||
class QMPTestCase(unittest.TestCase):
|
||||
'''Abstract base class for QMP test cases'''
|
||||
|
||||
def dictpath(self, d, path):
|
||||
'''Traverse a path in a nested dict'''
|
||||
for component in path.split('/'):
|
||||
m = index_re.match(component)
|
||||
if m:
|
||||
component, idx = m.groups()
|
||||
idx = int(idx)
|
||||
|
||||
if not isinstance(d, dict) or component not in d:
|
||||
self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
|
||||
d = d[component]
|
||||
|
||||
if m:
|
||||
if not isinstance(d, list):
|
||||
self.fail('path component "%s" in "%s" is not a list in "%s"' % (component, path, str(d)))
|
||||
try:
|
||||
d = d[idx]
|
||||
except IndexError:
|
||||
self.fail('invalid index "%s" in path "%s" in "%s"' % (idx, path, str(d)))
|
||||
return d
|
||||
|
||||
def assert_qmp(self, d, path, value):
|
||||
'''Assert that the value for a specific path in a QMP dict matches'''
|
||||
result = self.dictpath(d, path)
|
||||
self.assertEqual(result, value, 'values not equal "%s" and "%s"' % (str(result), str(value)))
|
||||
|
||||
def notrun(reason):
|
||||
'''Skip this test suite'''
|
||||
# Each test in qemu-iotests has a number ("seq")
|
||||
seq = os.path.basename(sys.argv[0])
|
||||
|
||||
open('%s.notrun' % seq, 'wb').write(reason + '\n')
|
||||
print '%s not run: %s' % (seq, reason)
|
||||
sys.exit(0)
|
||||
|
||||
def main(supported_fmts=[]):
|
||||
'''Run tests'''
|
||||
|
||||
if supported_fmts and (imgfmt not in supported_fmts):
|
||||
notrun('not suitable for this image format: %s' % imgfmt)
|
||||
|
||||
# We need to filter out the time taken from the output so that qemu-iotest
|
||||
# can reliably diff the results against master output.
|
||||
import StringIO
|
||||
output = StringIO.StringIO()
|
||||
|
||||
class MyTestRunner(unittest.TextTestRunner):
|
||||
def __init__(self, stream=output, descriptions=True, verbosity=1):
|
||||
unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity)
|
||||
|
||||
# unittest.main() will use sys.exit() so expect a SystemExit exception
|
||||
try:
|
||||
unittest.main(testRunner=MyTestRunner)
|
||||
finally:
|
||||
sys.stderr.write(re.sub(r'Ran (\d+) test[s] in [\d.]+s', r'Ran \1 tests', output.getvalue()))
|
||||
Loading…
Reference in New Issue