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# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
# Copyright 2018-2019 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# This file is part of qutebrowser.
#
# qutebrowser 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 3 of the License, or
# (at your option) any later version.
#
# qutebrowser 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 qutebrowser. If not, see <http://www.gnu.org/licenses/>.
"""Tests for qutebrowser.components.misccommands."""
import signal
import contextlib
import time
import pytest
from qutebrowser.api import cmdutils
from qutebrowser.utils import utils
from qutebrowser.components import misccommands
@contextlib.contextmanager
def _trapped_segv(handler):
"""Temporarily install given signal handler for SIGSEGV."""
old_handler = signal.signal(signal.SIGSEGV, handler)
yield
signal.signal(signal.SIGSEGV, old_handler)
def test_debug_crash_exception():
"""Verify that debug_crash crashes as intended."""
with pytest.raises(Exception, match="Forced crash"):
misccommands.debug_crash(typ='exception')
@pytest.mark.skipif(utils.is_windows,
reason="current CPython/win can't recover from SIGSEGV")
def test_debug_crash_segfault():
"""Verify that debug_crash crashes as intended."""
caught = False
def _handler(num, frame):
"""Temporary handler for segfault."""
nonlocal caught
caught = num == signal.SIGSEGV
with _trapped_segv(_handler):
# since we handle the segfault, execution will continue and run into
# the "Segfault failed (wat.)" Exception
with pytest.raises(Exception, match="Segfault failed"):
misccommands.debug_crash(typ='segfault')
time.sleep(0.001)
assert caught
def test_debug_trace(mocker):
"""Check if hunter.trace is properly called."""
# but only if hunter is available
pytest.importorskip('hunter')
hunter_mock = mocker.patch.object(misccommands, 'hunter')
misccommands.debug_trace(1)
hunter_mock.trace.assert_called_with(1)
def test_debug_trace_exception(mocker):
"""Check that exceptions thrown by hunter.trace are handled."""
def _mock_exception():
"""Side effect for testing debug_trace's reraise."""
raise Exception('message')
hunter_mock = mocker.patch.object(misccommands, 'hunter')
hunter_mock.trace.side_effect = _mock_exception
with pytest.raises(cmdutils.CommandError, match='Exception: message'):
misccommands.debug_trace()
def test_debug_trace_no_hunter(monkeypatch):
"""Test that an error is shown if debug_trace is called without hunter."""
monkeypatch.setattr(misccommands, 'hunter', None)
with pytest.raises(cmdutils.CommandError, match="You need to install "
"'hunter' to use this command!"):
misccommands.debug_trace()
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