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# Copyright (C) 2007 Canonical Ltd
# Authors: Robert Collins <robert.collins@canonical.com>
#
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Tests for the strace-invoking support."""
import errno
import subprocess
import threading
from bzrlib import (
tests,
)
from bzrlib.strace import StraceFeature, strace_detailed, StraceResult
class TestStraceFeature(tests.TestCaseWithTransport):
def test_strace_detection(self):
"""Strace is available if its runnable."""
try:
proc = subprocess.Popen(['strace'],
stderr=subprocess.PIPE,
stdout=subprocess.PIPE)
proc.communicate()
found_strace = True
except OSError, e:
if e.errno == errno.ENOENT:
# strace is not installed
found_strace = False
else:
raise
self.assertEqual(found_strace, StraceFeature.available())
class TestStrace(tests.TestCaseWithTransport):
_test_needs_features = [StraceFeature]
def _check_threads(self):
# For bug #226769, it was decided that the strace tests should not be
# run when more than one thread is active. A lot of tests are currently
# leaking threads for good or bad reasons, once they are fixed or
# strace itself is fixed (bug #103133), we can get rid of the
# restriction.
active = threading.activeCount()
if active > 1: # There is always the main thread at least
raise tests.KnownFailure(
'%d active threads, bug #103133 needs to be fixed.' % active)
def test_strace_callable_is_called(self):
self._check_threads()
output = []
def function(positional, *args, **kwargs):
output.append((positional, args, kwargs))
strace_detailed(function, ["a", "b"], {"c": "c"},
follow_children=False)
self.assertEqual([("a", ("b",), {"c":"c"})], output)
def test_strace_callable_result(self):
self._check_threads()
def function():
return "foo"
result, strace_result = strace_detailed(function,[], {},
follow_children=False)
self.assertEqual("foo", result)
self.assertIsInstance(strace_result, StraceResult)
def test_strace_result_has_raw_log(self):
"""Checks that a reasonable raw strace log was found by strace."""
self._check_threads()
def function():
self.build_tree(['myfile'])
unused, result = strace_detailed(function, [], {},
follow_children=False)
self.assertContainsRe(result.raw_log, 'myfile')
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