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214 lines
7.8 KiB
Python
214 lines
7.8 KiB
Python
# -*- coding: utf-8 -*-
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'''
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:codeauthor: Pedro Algarvio (pedro@algarvio.me)
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tests.unit.utils.vt_test
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~~~~~~~~~~~~~~~~~~~~~~~~
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VirtualTerminal tests
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'''
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# Import python libs
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from __future__ import absolute_import
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import os
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import sys
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import random
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import subprocess
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import time
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# Import Salt Testing libs
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from tests.support.unit import TestCase, skipIf
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# Import salt libs
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import salt.utils
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import salt.utils.vt
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# Import 3rd-party libs
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from salt.ext.six.moves import range # pylint: disable=import-error,redefined-builtin
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class VTTestCase(TestCase):
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@skipIf(True, 'Disabled until we can figure out why this fails when whole test suite runs.')
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def test_vt_size(self):
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'''Confirm that the terminal size is being set'''
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if not sys.stdin.isatty():
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self.skipTest('Not attached to a TTY. The test would fail.')
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cols = random.choice(range(80, 250))
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terminal = salt.utils.vt.Terminal(
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'echo "Foo!"',
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shell=True,
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cols=cols,
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rows=24,
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stream_stdout=False,
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stream_stderr=False
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)
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# First the assertion
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self.assertEqual(
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terminal.getwinsize(), (24, cols)
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)
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# Then wait for the terminal child to exit
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terminal.wait()
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terminal.close()
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@skipIf(True, 'Disabled until we can find out why this kills the tests suite with an exit code of 134')
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def test_issue_10404_ptys_not_released(self):
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n_executions = 15
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def current_pty_count():
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# Get current number of PTY's
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try:
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if os.path.exists('/proc/sys/kernel/pty/nr'):
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with salt.utils.fopen('/proc/sys/kernel/pty/nr') as fh_:
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return int(fh_.read().strip())
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proc = subprocess.Popen(
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'sysctl -a 2> /dev/null | grep pty.nr | awk \'{print $3}\'',
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shell=True,
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stdout=subprocess.PIPE
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)
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stdout, _ = proc.communicate()
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return int(stdout.strip())
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except (ValueError, OSError, IOError):
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if salt.utils.is_darwin():
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# We're unable to findout how many PTY's are open
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self.skipTest(
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'Unable to find out how many PTY\'s are open on Darwin - '
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'Skipping for now'
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)
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self.fail('Unable to find out how many PTY\'s are open')
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nr_ptys = current_pty_count()
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# Using context manager's
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for idx in range(0, nr_ptys + n_executions):
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try:
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with salt.utils.vt.Terminal('echo "Run {0}"'.format(idx),
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shell=True,
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stream_stdout=False,
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stream_stderr=False) as terminal:
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terminal.wait()
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try:
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if current_pty_count() > (nr_ptys + (n_executions/2)):
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self.fail('VT is not cleaning up PTY\'s')
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except (ValueError, OSError, IOError):
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self.fail('Unable to find out how many PTY\'s are open')
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except Exception as exc:
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if 'out of pty devices' in exc:
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# We're not cleaning up
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raise
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# We're pushing the system resources, let's keep going
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continue
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# Not using context manager's
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for idx in range(0, nr_ptys + n_executions):
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try:
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terminal = salt.utils.vt.Terminal('echo "Run {0}"'.format(idx),
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shell=True,
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stream_stdout=False,
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stream_stderr=False)
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terminal.wait()
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try:
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if current_pty_count() > (nr_ptys + (n_executions/2)):
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self.fail('VT is not cleaning up PTY\'s')
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except (ValueError, OSError, IOError):
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self.fail('Unable to find out how many PTY\'s are open')
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except Exception as exc:
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if 'out of pty devices' in exc:
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# We're not cleaning up
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raise
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# We're pushing the system resources, let's keep going
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continue
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@skipIf(True, 'Disabled until we can figure out how to make this more reliable.')
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def test_isalive_while_theres_data_to_read(self):
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expected_data = 'Alive!\n'
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term = salt.utils.vt.Terminal('echo "Alive!"',
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shell=True,
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stream_stdout=False,
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stream_stderr=False)
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buffer_o = buffer_e = ''
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try:
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while term.has_unread_data:
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stdout, stderr = term.recv()
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if stdout:
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buffer_o += stdout
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if stderr:
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buffer_e += stderr
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# While there's data to be read, the process is alive
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if stdout is None and stderr is None:
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self.assertFalse(term.isalive())
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# term should be dead now
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self.assertEqual(buffer_o, expected_data)
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self.assertFalse(term.isalive())
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stdout, stderr = term.recv()
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self.assertFalse(term.isalive())
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self.assertIsNone(stderr)
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self.assertIsNone(stdout)
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finally:
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term.close(terminate=True, kill=True)
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expected_data = 'Alive!\n'
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term = salt.utils.vt.Terminal('echo "Alive!" 1>&2',
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shell=True,
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stream_stdout=False,
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stream_stderr=False)
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buffer_o = buffer_e = ''
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try:
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while term.has_unread_data:
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stdout, stderr = term.recv()
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if stdout:
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buffer_o += stdout
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if stderr:
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buffer_e += stderr
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# While there's data to be read, the process is alive
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if stdout is None and stderr is None:
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self.assertFalse(term.isalive())
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# term should be dead now
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self.assertEqual(buffer_e, expected_data)
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self.assertFalse(term.isalive())
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stdout, stderr = term.recv()
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self.assertFalse(term.isalive())
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self.assertIsNone(stderr)
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self.assertIsNone(stdout)
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finally:
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term.close(terminate=True, kill=True)
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expected_data = 'Alive!\nAlive!\n'
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term = salt.utils.vt.Terminal('echo "Alive!"; sleep 5; echo "Alive!"',
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shell=True,
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stream_stdout=False,
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stream_stderr=False)
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buffer_o = buffer_e = ''
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try:
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while term.has_unread_data:
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stdout, stderr = term.recv()
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if stdout:
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buffer_o += stdout
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if stderr:
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buffer_e += stderr
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# While there's data to be read, the process is alive
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if stdout is None and stderr is None:
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self.assertFalse(term.isalive())
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if buffer_o != expected_data:
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self.assertTrue(term.isalive())
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# Don't spin
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time.sleep(0.1)
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# term should be dead now
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self.assertEqual(buffer_o, expected_data)
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self.assertFalse(term.isalive())
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stdout, stderr = term.recv()
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self.assertFalse(term.isalive())
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self.assertIsNone(stderr)
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self.assertIsNone(stdout)
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finally:
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term.close(terminate=True, kill=True)
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