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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 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 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))
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'))
# 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)
REAL_HOST = RealHost()
class RealHostTasst(BaseSiteTasst):
def setUp(self):
super().setUp()
BaseSiteTasst.subsetup(self, REAL_HOST)
|