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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Tests for the strace-invoking support."""
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from bzrlib.strace import strace_detailed, StraceResult
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from bzrlib.tests.features import (
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class TestStrace(tests.TestCaseWithTransport):
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_test_needs_features = [strace_feature]
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# NB: see http://pad.lv/626679 and
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# <https://code.launchpad.net/~mbp/bzr/626679-strace/+merge/34157>:
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# testing strace by connecting to ourselves has repeatedly caused
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# hangs in running the test suite; these are fixable given enough
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# determination but given that strace is not used by any other tests
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# at the moment and that it's only test-support code, we just leave it
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# untested -- mbp 20100901
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raise tests.TestSkipped("strace selftests are broken and disabled")
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def _check_threads(self):
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# For bug #226769, it was decided that the strace tests should not be
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# run when more than one thread is active. A lot of tests are currently
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# leaking threads for good or bad reasons, once they are fixed or
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# strace itself is fixed (bug #103133), we can get rid of the
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active = threading.activeCount()
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if active > 1: # There is always the main thread at least
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'%d active threads, bug #103133 needs to be fixed.' % active)
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def strace_detailed_or_skip(self, *args, **kwargs):
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"""Run strace, but cope if it's not allowed"""
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from bzrlib.strace import StraceFeature, strace, StraceResult
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from bzrlib.tests import TestCaseWithTransport
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class TestStraceFeature(TestCaseWithTransport):
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def test_strace_detection(self):
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"""Strace is available if its runnable."""
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return strace_detailed(*args, **kwargs)
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except strace.StraceError, e:
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if e.err_messages.startswith(
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"attach: ptrace(PTRACE_ATTACH, ...): Operation not permitted"):
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raise tests.TestSkipped("ptrace not permitted")
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proc = subprocess.Popen(['strace'],
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stderr=subprocess.PIPE,
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stdout=subprocess.PIPE)
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if e.errno == errno.ENOENT:
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# strace is not installed
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self.assertEqual(found_strace, StraceFeature.available())
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class TestStrace(TestCaseWithTransport):
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_test_needs_features = [StraceFeature]
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def test_strace_callable_is_called(self):
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def function(positional, *args, **kwargs):
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output.append((positional, args, kwargs))
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self.strace_detailed_or_skip(
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function, ["a", "b"], {"c": "c"},
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follow_children=False)
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strace(function, "a", "b", c="c")
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self.assertEqual([("a", ("b",), {"c":"c"})], output)
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def test_strace_callable_result(self):
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result, strace_result = self.strace_detailed_or_skip(function,[], {},
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follow_children=False)
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result, strace_result = strace(function)
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self.assertEqual("foo", result)
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self.assertIsInstance(strace_result, StraceResult)
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def test_strace_result_has_raw_log(self):
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"""Checks that a reasonable raw strace log was found by strace."""
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self.build_tree(['myfile'])
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unused, result = self.strace_detailed_or_skip(function, [], {},
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follow_children=False)
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_, result = strace(function)
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self.assertContainsRe(result.raw_log, 'myfile')