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| | #! /usr/bin/env avocado-runner-avocado-classless
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Copyright Red Hat
# Author: David Gibson <david@gibson.dropbear.id.au>
"""
Test A Simple Socket Transport
tasst/exesite.py - Manage simulated network sites for testing
"""
import contextlib
import json
import avocado
from avocado.utils.process import CmdError
from avocado_classless.test import (
assert_eq, assert_in, assert_raises, test_output
)
from tasst.typecheck import typecheck
class SiteProcess(contextlib.AbstractContextManager):
"""
A background process running on a Site
"""
def __init__(self, site, cmd, subp, *,
ignore_status, context_timeout):
self.site = typecheck(site, Site)
self.cmd = typecheck(cmd, str)
self.subproc = typecheck(subp, avocado.utils.process.SubProcess)
self.ignore_status = typecheck(ignore_status, bool)
self.context_timeout = float(context_timeout)
def __enter__(self):
self.subproc.start()
return self
def __exit__(self, *exc_details):
result = self.subproc.run(timeout=self.context_timeout)
if not self.ignore_status and result.exit_status != 0:
siteinfo = f'[{self.site.name} site]'
raise avocado.utils.process.CmdError(self.cmd, result, siteinfo)
def run(self, **kwargs):
return self.subproc.run(**kwargs)
class Site(contextlib.AbstractContextManager):
"""
A (usually virtual or simulated) location where we can execute
commands and configure networks.
"""
def __init__(self, name):
self.name = name # For debugging
def hostify(self, cmd, **kwargs):
raise NotImplementedError
def __enter__(self):
return self
def __exit__(self, *exc_details):
pass
def output(self, cmd, strip_trail_nl=False, **kwargs):
kwargs['strip_trail_nl'] = strip_trail_nl
cmd, kwargs = self.hostify(cmd, **kwargs)
return avocado.utils.process.system_output(cmd, **kwargs)
def fg(self, cmd, **kwargs):
cmd, kwargs = self.hostify(cmd, **kwargs)
return avocado.utils.process.system(cmd, **kwargs)
def subprocess(self, cmd, **kwargs):
cmd, kwargs = self.hostify(cmd, **kwargs)
return avocado.utils.process.SubProcess(cmd, **kwargs)
def bg(self, cmd, context_timeout=1.0, ignore_status=False, **kwargs):
subproc = self.subprocess(cmd, **kwargs)
return SiteProcess(self, cmd, subproc,
context_timeout=context_timeout,
ignore_status=ignore_status)
def require_cmds(self, *cmds):
missing = [c for c in cmds
if self.fg(f'type {c}', ignore_status=True) != 0]
if missing:
raise avocado.TestCancel(
f"Missing commands {', '.join(missing)} on {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 test_site(sitefn):
def test_true(s):
with s as site:
site.fg('true')
def test_false(s):
with s as site:
assert_raises(CmdError, site.fg, 'false')
def test_echo(s):
with s as site:
msg = 'Hello tasst'
out = site.output(f'echo {msg}')
assert_eq(out, msg.encode('utf-8') + b'\n')
def test_timeout(s):
with s as site:
site.fg('sleep infinity', timeout=0.1, ignore_status=True)
def test_bg_true(s):
with s as site:
with site.bg('true'):
pass
def test_bg_false(s):
with s as site:
def run_false():
with site.bg('false'):
pass
assert_raises(CmdError, run_false)
def test_bg_echo(s):
msg = 'Hello tasst'
with s as site:
with site.bg(f'echo {msg}') as proc:
res = proc.run()
assert_eq(res.stdout, msg.encode('utf-8') + b'\n')
def test_bg_timeout(s):
with s as site:
with site.bg('sleep infinity', ignore_status=True) as proc:
proc.run(timeout=0.1)
def test_bg_context_timeout(s):
with s as site:
with site.bg('sleep infinity', context_timeout=0.1,
ignore_status=True):
pass
def test_has_lo(s):
with s as site:
assert_in('lo', site.ifs())
return test_output(test_true, test_false, test_echo, test_timeout,
test_bg_true, test_bg_false, test_bg_echo,
test_bg_timeout, test_bg_context_timeout,
test_has_lo)(sitefn)
def test_isolated_site(sitefn):
def test_isolated_net(s):
with s as site:
assert_eq(site.ifs(), ['lo'])
return test_output(test_isolated_net)(test_site(sitefn))
class RealHost(Site):
"""Represents the host on which the tests are running (as opposed
to some simulated host created by the tests)
"""
def __init__(self):
super().__init__('REAL_HOST')
def hostify(self, cmd, *, sudo=False, **kwargs):
assert not sudo, "BUG: Shouldn't run commands with privilege on host"
return cmd, kwargs
REAL_HOST = RealHost()
@test_site
def real_host():
return REAL_HOST
|