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#
# Test helpers for FRR
#
# Copyright (C) 2017 by David Lamparter & Christian Franke,
# Open Source Routing / NetDEF Inc.
#
# This file is part of FRRouting (FRR)
#
# FRR 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, or (at your option) any
# later version.
#
# FRR 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 FRR; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
#
import subprocess
import sys
import re
import inspect
import os
import difflib
import frrsix
#
# These are the gritty internals of the TestMultiOut implementation.
# See below for the definition of actual TestMultiOut tests.
#
srcbase = os.path.abspath(inspect.getsourcefile(frrsix))
for i in range(0, 3):
srcbase = os.path.dirname(srcbase)
def binpath(srcpath):
return os.path.relpath(os.path.abspath(srcpath), srcbase)
class MultiTestFailure(Exception):
pass
class MetaTestMultiOut(type):
def __getattr__(cls, name):
if name.startswith("_"):
raise AttributeError
internal_name = "_{}".format(name)
if internal_name not in dir(cls):
raise AttributeError
def registrar(*args, **kwargs):
cls._add_test(getattr(cls, internal_name), *args, **kwargs)
return registrar
@frrsix.add_metaclass(MetaTestMultiOut)
class _TestMultiOut(object):
def _run_tests(self):
if "tests_run" in dir(self.__class__) and self.tests_run:
return
self.__class__.tests_run = True
basedir = os.path.dirname(inspect.getsourcefile(type(self)))
program = os.path.join(basedir, self.program)
proc = subprocess.Popen([binpath(program)], stdout=subprocess.PIPE)
self.output, _ = proc.communicate("")
self.exitcode = proc.wait()
self.__class__.testresults = {}
for test in self.tests:
try:
test(self)
except MultiTestFailure:
self.testresults[test] = sys.exc_info()
else:
self.testresults[test] = None
def _exit_cleanly(self):
if self.exitcode != 0:
raise MultiTestFailure("Program did not terminate with exit code 0")
@classmethod
def _add_test(cls, method, *args, **kwargs):
if "tests" not in dir(cls):
setattr(cls, "tests", [])
if method is not cls._exit_cleanly:
cls._add_test(cls._exit_cleanly)
def matchfunction(self):
method(self, *args, **kwargs)
cls.tests.append(matchfunction)
def testfunction(self):
self._run_tests()
result = self.testresults[matchfunction]
if result is not None:
frrsix.reraise(*result)
testname = re.sub(r"[^A-Za-z0-9]", "_", "%r%r" % (args, kwargs))
testname = re.sub(r"__*", "_", testname)
testname = testname.strip("_")
if not testname:
testname = method.__name__.strip("_")
if "test_%s" % testname in dir(cls):
index = 2
while "test_%s_%d" % (testname, index) in dir(cls):
index += 1
testname = "%s_%d" % (testname, index)
setattr(cls, "test_%s" % testname, testfunction)
#
# This class houses the actual TestMultiOut tests types.
# If you want to add a new test type, you probably do it here.
#
# Say you want to add a test type called foobarlicious. Then define
# a function _foobarlicious here that takes self and the test arguments
# when called. That function should check the output in self.output
# to see whether it matches the expectation of foobarlicious with the
# given arguments and should then adjust self.output according to how
# much output it consumed.
# If the output doesn't meet the expectations, MultiTestFailure can be
# raised, however that should only be done after self.output has been
# modified according to consumed content.
#
re_okfail = re.compile(r"(?:[3[12]m|^)?(?P<ret>OK|failed)".encode("utf8"), re.MULTILINE)
class TestMultiOut(_TestMultiOut):
def _onesimple(self, line):
if type(line) is str:
line = line.encode("utf8")
idx = self.output.find(line)
if idx != -1:
self.output = self.output[idx + len(line) :]
else:
raise MultiTestFailure("%r could not be found" % line)
def _okfail(self, line, okfail=re_okfail):
self._onesimple(line)
m = okfail.search(self.output)
if m is None:
raise MultiTestFailure("OK/fail not found")
self.output = self.output[m.end() :]
if m.group("ret") != "OK".encode("utf8"):
raise MultiTestFailure("Test output indicates failure")
#
# This class implements a test comparing the output of a program against
# an existing reference output
#
class TestRefMismatch(Exception):
def __init__(self, _test, outtext, reftext):
self.outtext = outtext
self.reftext = reftext
def __str__(self):
rv = "Expected output and actual output differ:\n"
rv += "\n".join(
difflib.unified_diff(
self.reftext.splitlines(),
self.outtext.splitlines(),
"outtext",
"reftext",
lineterm="",
)
)
return rv
class TestExitNonzero(Exception):
pass
class TestRefOut(object):
def test_refout(self):
basedir = os.path.dirname(inspect.getsourcefile(type(self)))
program = os.path.join(basedir, self.program)
if getattr(self, "built_refin", False):
refin = binpath(program) + ".in"
else:
refin = program + ".in"
if getattr(self, "built_refout", False):
refout = binpath(program) + ".refout"
else:
refout = program + ".refout"
intext = ""
if os.path.exists(refin):
with open(refin, "rb") as f:
intext = f.read()
with open(refout, "rb") as f:
reftext = f.read()
proc = subprocess.Popen(
[binpath(program)], stdin=subprocess.PIPE, stdout=subprocess.PIPE
)
outtext, _ = proc.communicate(intext)
# Get rid of newline problems (Windows vs Unix Style)
outtext_str = outtext.decode("utf8").replace("\r\n", "\n").replace("\r", "\n")
reftext_str = reftext.decode("utf8").replace("\r\n", "\n").replace("\r", "\n")
if outtext_str != reftext_str:
raise TestRefMismatch(self, outtext_str, reftext_str)
if proc.wait() != 0:
raise TestExitNonzero(self)
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