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| | #! /usr/bin/python3
# SPDX-License-Identifier: GPL-2.0-or-later
#
# tasst - Test A Simple Socket Transport
# library of test helpers for passt & pasta
#
# tasst/site.py - Manage simulated network sites for testing
#
# Copyright Red Hat
# Author: David Gibson <david@gibson.dropbear.id.au>
import ipaddress
import json
import avocado
from avocado.utils.process import CmdError
from tasst import Tasst
class Site:
"""
A (usually virtual or simulated) location where we can execute
commands and configure networks.
"""
def __init__(self, name):
self.name = name # For debugging
# Shut down the site and release any resources it's using. We
# can't use __del__() for this (RAII like), because Python doesn't
# guarantee that will get called, and that's pretty easy to hit in
# practice. The modern Pythonic way of doing this is 'with' and
# ContextManagers, but that doesn't work with Avocado's jUnit
# derived format for setUp() and tearDown(). Oh well, do it
# manually.
def close(self):
pass
def output(self, cmd, **kwargs):
raise NotImplementedError
def fg(self, cmd, **kwargs):
self.output(cmd, **kwargs)
def bg(self, cmd, **kwargs):
raise NotImplementedError
def require_cmds(self, *cmds):
missing = [c for c in cmds
if self.fg('type {}'.format(c), ignore_status=True) != 0]
if missing:
raise avocado.TestCancel("Missing commands {} on {}"
.format(', '.join(missing), self.name))
def ifs(self):
self.require_cmds('ip')
info = json.loads(self.output('ip -j link show'))
return [i['ifname'] for i in info]
def ifup(self, ifname):
self.require_cmds('ip')
self.fg('ip link set {} up'.format(ifname), sudo=True)
def addrinfos(self, ifname, **filter):
self.require_cmds('ip')
info = json.loads(self.output('ip -j addr show {}'.format(ifname)))
assert len(info) == 1 # We specified a specific interface
ais = [ai for ai in info[0]['addr_info']]
for key, value in filter.items():
ais = [ai for ai in ais if key in ai and ai[key] == value]
return ais
def addrs(self, ifname, **filter):
self.require_cmds('ip')
# Return just the parsed, non-tentative addresses
return [ipaddress.ip_interface('{}/{}'.format(ai['local'], ai['prefixlen']))
for ai in self.addrinfos(ifname, **filter)
if not 'tentative' in ai]
class BaseSiteTasst(Tasst):
"""
Basic tests for executing commands on sites
:avocado: disable
:avocado: tags=meta
"""
timeout = 1.0
# Derived classes must call this from setUp()
def subsetup(self, site):
assert isinstance(site, Site)
site.require_cmds('true', 'false', 'echo')
Tasst.subsetup(self, BaseSiteTasst, site)
def test_true(self):
site = self.get_subsetup(BaseSiteTasst)
site.fg('true')
def test_false(self):
site = self.get_subsetup(BaseSiteTasst)
self.assertRaises(CmdError, site.fg, 'false')
def test_echo(self):
site = self.get_subsetup(BaseSiteTasst)
s = 'Hello tasst'
out = site.output('echo {}'.format(s))
self.assertEquals(out, s.encode('utf-8'))
def test_bg_true(self):
site = self.get_subsetup(BaseSiteTasst)
proc = site.bg('true')
status = proc.wait()
self.assertEquals(status, 0)
def test_bg_false(self):
site = self.get_subsetup(BaseSiteTasst)
proc = site.bg('false')
status = proc.wait()
self.assertNotEquals(status, 0)
def test_has_lo(self):
site = self.get_subsetup(BaseSiteTasst)
self.assertIn('lo', site.ifs())
def test_lo_addrs(self):
site = self.get_subsetup(BaseSiteTasst)
expected = [ipaddress.ip_interface(a)
for a in ['127.0.0.1/8', '::1/128']]
self.assertCountEqual(site.addrs('lo'), expected)
# Represents the host on which the tests are running, as opposed to
# some simulated host created by the tests
class RealHost(Site):
def __init__(self):
super().__init__('REAL_HOST')
def output(self, cmd, sudo=False, **kwargs):
assert not sudo, "BUG: Shouldn't run commands with privilege on host"
return avocado.utils.process.system_output(cmd, **kwargs)
def fg(self, cmd, sudo=False, **kwargs):
assert not sudo, "BUG: Shouldn't run commands with privilege on host"
return avocado.utils.process.system(cmd, **kwargs)
def bg(self, cmd, sudo=False, **kwargs):
assert not sudo, "BUG: Shouldn't run commands with privilege on host"
proc = avocado.utils.process.SubProcess(cmd, **kwargs)
proc.start()
return proc
REAL_HOST = RealHost()
class RealHostTasst(BaseSiteTasst):
def setUp(self):
super().setUp()
BaseSiteTasst.subsetup(self, REAL_HOST)
|