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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Tests for the strace-invoking support."""
import errno
import subprocess
from bzrlib.strace import StraceFeature, strace, StraceResult
from bzrlib.tests import TestCaseWithTransport
class TestStraceFeature(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(TestCaseWithTransport):
_test_needs_features = [StraceFeature]
def test_strace_callable_is_called(self):
output = []
def function(positional, *args, **kwargs):
output.append((positional, args, kwargs))
strace(function, "a", "b", c="c")
self.assertEqual([("a", ("b",), {"c":"c"})], output)
def test_strace_callable_result(self):
def function():
return "foo"
result, strace_result = strace(function)
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."""
def function():
self.build_tree(['myfile'])
_, result = strace(function)
self.assertContainsRe(result.raw_log, 'myfile')
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