salt/tests/unit/utils/vt_test.py
2014-07-22 15:20:03 +01:00

112 lines
3.8 KiB
Python

# -*- coding: utf-8 -*-
'''
:codeauthor: :email:`Pedro Algarvio (pedro@algarvio.me)`
tests.unit.utils.vt_test
~~~~~~~~~~~~~~~~~~~~~~~~
VirtualTerminal tests
'''
# Import python libs
import os
import sys
import random
import subprocess
# Import Salt Testing libs
from salttesting import TestCase
from salttesting.helpers import ensure_in_syspath
ensure_in_syspath('../../')
# Import salt libs
from salt.utils import vt, fopen
class VTTestCase(TestCase):
def test_vt_size(self):
'''Confirm that the terminal size is being set'''
if not sys.stdin.isatty():
self.skipTest('Not attached to a TTY. The test would fail.')
cols = random.choice(range(80, 250))
terminal = vt.Terminal(
'echo "Foo!"',
shell=True,
cols=cols,
rows=24,
stream_stdout=False,
stream_stderr=False
)
# First the assertion
self.assertEqual(
terminal.getwinsize(), (24, cols)
)
# Then wait for the terminal child to exit
terminal.wait()
terminal.close()
def test_issue_10404_ptys_not_released(self):
n_executions = 15
# Get current number of PTY's
try:
if os.path.exists('/proc/sys/kernel/pty/nr'):
with fopen('/proc/sys/kernel/pty/nr') as fh_:
nr_ptys = int(fh_.read().strip())
else:
proc = subprocess.Popen(
'sysctl -a 2> /dev/null | grep pty.nr | awk \'{print $3}\'',
shell=True,
stdout=subprocess.PIPE
)
stdout, _ = proc.communicate()
nr_ptys = int(stdout.strip())
except (ValueError, OSError, IOError):
self.fail('Unable to find out how many PTY\'s are open')
# Using context manager's
for idx in range(0, nr_ptys + n_executions):
try:
with vt.Terminal('echo "Run {0}"'.format(idx),
shell=True,
stream_stdout=False,
stream_stderr=False) as terminal:
terminal.wait()
try:
if int(open('/proc/sys/kernel/pty/nr').read().strip()) > (nr_ptys + (n_executions/2)):
self.fail('VT is not cleaning up PTY\'s')
except (ValueError, OSError, IOError):
self.fail('Unable to find out how many PTY\'s are open')
except Exception as exc:
if 'out of pty devices' in exc:
# We're not cleaning up
raise
# We're pushing the system resources, let's keep going
continue
# Not using context manager's
for idx in range(0, nr_ptys + n_executions):
try:
terminal = vt.Terminal('echo "Run {0}"'.format(idx),
shell=True,
stream_stdout=False,
stream_stderr=False)
terminal.wait()
try:
if int(open('/proc/sys/kernel/pty/nr').read().strip()) > (nr_ptys + (n_executions/2)):
self.fail('VT is not cleaning up PTY\'s')
except (ValueError, OSError, IOError):
self.fail('Unable to find out how many PTY\'s are open')
except Exception as exc:
if 'out of pty devices' in exc:
# We're not cleaning up
raise
# We're pushing the system resources, let's keep going
continue
if __name__ == '__main__':
from integration import run_tests
run_tests(VTTestCase, needs_daemon=False)