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community.general/test/units/module_utils/basic/test_run_command.py
Brian Coca e280f2f7b0
Try to get correct buffer size to avoid races (#53547)
* Try to get correct buffer size to avoid races

  fixes #51393

* fix test, mock buffer function since all is mocked
2019-03-14 11:04:56 -04:00

207 lines
7.7 KiB
Python

# -*- coding: utf-8 -*-
# Copyright (c) 2017 Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
# Make coding more python3-ish
from __future__ import (absolute_import, division)
__metaclass__ = type
import errno
from itertools import product
from io import BytesIO
import pytest
from ansible.module_utils._text import to_native
class OpenBytesIO(BytesIO):
"""BytesIO with dummy close() method
So that you can inspect the content after close() was called.
"""
def close(self):
pass
@pytest.fixture
def mock_os(mocker):
def mock_os_read(fd, nbytes):
return os._cmd_out[fd].read(nbytes)
def mock_os_chdir(path):
if path == '/inaccessible':
raise OSError(errno.EPERM, "Permission denied: '/inaccessible'")
def mock_os_abspath(path):
if path.startswith('/'):
return path
else:
return os.getcwd.return_value + '/' + path
os = mocker.patch('ansible.module_utils.basic.os')
os._cmd_out = {
# os.read() is returning 'bytes', not strings
mocker.sentinel.stdout: BytesIO(),
mocker.sentinel.stderr: BytesIO(),
}
os.path.expandvars.side_effect = lambda x: x
os.path.expanduser.side_effect = lambda x: x
os.environ = {'PATH': '/bin'}
os.getcwd.return_value = '/home/foo'
os.path.isdir.return_value = True
os.chdir.side_effect = mock_os_chdir
os.read.side_effect = mock_os_read
os.path.abspath.side_effect = mock_os_abspath
yield os
@pytest.fixture
def mock_subprocess(mocker):
def mock_select(rlist, wlist, xlist, timeout=1):
return (rlist, [], [])
fake_select = mocker.patch('ansible.module_utils.basic.select')
fake_select.select.side_effect = mock_select
subprocess = mocker.patch('ansible.module_utils.basic.subprocess')
cmd = mocker.MagicMock()
cmd.returncode = 0
cmd.stdin = OpenBytesIO()
cmd.stdout.fileno.return_value = mocker.sentinel.stdout
cmd.stderr.fileno.return_value = mocker.sentinel.stderr
subprocess.Popen.return_value = cmd
yield subprocess
@pytest.fixture()
def rc_am(mocker, am, mock_os, mock_subprocess):
am.fail_json = mocker.MagicMock(side_effect=SystemExit)
am._os = mock_os
am._subprocess = mock_subprocess
am.get_buffer_size = mocker.MagicMock(return_value=900)
yield am
class TestRunCommandArgs:
# Format is command as passed to run_command, command to Popen as list, command to Popen as string
ARGS_DATA = (
(['/bin/ls', 'a', 'b', 'c'], ['/bin/ls', 'a', 'b', 'c'], '/bin/ls a b c'),
('/bin/ls a " b" "c "', ['/bin/ls', 'a', ' b', 'c '], '/bin/ls a " b" "c "'),
)
# pylint bug: https://github.com/PyCQA/pylint/issues/511
# pylint: disable=undefined-variable
@pytest.mark.parametrize('cmd, expected, shell, stdin',
((arg, cmd_str if sh else cmd_lst, sh, {})
for (arg, cmd_lst, cmd_str), sh in product(ARGS_DATA, (True, False))),
indirect=['stdin'])
def test_args(self, cmd, expected, shell, rc_am):
rc_am.run_command(cmd, use_unsafe_shell=shell)
assert rc_am._subprocess.Popen.called
args, kwargs = rc_am._subprocess.Popen.call_args
assert args == (expected, )
assert kwargs['shell'] == shell
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_tuple_as_args(self, rc_am):
with pytest.raises(SystemExit):
rc_am.run_command(('ls', '/'))
assert rc_am.fail_json.called
class TestRunCommandCwd:
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_cwd(self, mocker, rc_am):
rc_am._os.getcwd.return_value = '/old'
rc_am.run_command('/bin/ls', cwd='/new')
assert rc_am._os.chdir.mock_calls == [mocker.call('/new'), mocker.call('/old'), ]
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_cwd_relative_path(self, mocker, rc_am):
rc_am._os.getcwd.return_value = '/old'
rc_am.run_command('/bin/ls', cwd='sub-dir')
assert rc_am._os.chdir.mock_calls == [mocker.call('/old/sub-dir'), mocker.call('/old'), ]
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_cwd_not_a_dir(self, mocker, rc_am):
rc_am._os.getcwd.return_value = '/old'
rc_am._os.path.isdir.side_effect = lambda d: d != '/not-a-dir'
rc_am.run_command('/bin/ls', cwd='/not-a-dir')
assert rc_am._os.chdir.mock_calls == [mocker.call('/old'), ]
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_cwd_inaccessible(self, rc_am):
with pytest.raises(SystemExit):
rc_am.run_command('/bin/ls', cwd='/inaccessible')
assert rc_am.fail_json.called
args, kwargs = rc_am.fail_json.call_args
assert kwargs['rc'] == errno.EPERM
class TestRunCommandPrompt:
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_prompt_bad_regex(self, rc_am):
with pytest.raises(SystemExit):
rc_am.run_command('foo', prompt_regex='[pP)assword:')
assert rc_am.fail_json.called
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_prompt_no_match(self, mocker, rc_am):
rc_am._os._cmd_out[mocker.sentinel.stdout] = BytesIO(b'hello')
(rc, _, _) = rc_am.run_command('foo', prompt_regex='[pP]assword:')
assert rc == 0
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_prompt_match_wo_data(self, mocker, rc_am):
rc_am._os._cmd_out[mocker.sentinel.stdout] = BytesIO(b'Authentication required!\nEnter password: ')
(rc, _, _) = rc_am.run_command('foo', prompt_regex=r'[pP]assword:', data=None)
assert rc == 257
class TestRunCommandRc:
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_check_rc_false(self, rc_am):
rc_am._subprocess.Popen.return_value.returncode = 1
(rc, _, _) = rc_am.run_command('/bin/false', check_rc=False)
assert rc == 1
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_check_rc_true(self, rc_am):
rc_am._subprocess.Popen.return_value.returncode = 1
with pytest.raises(SystemExit):
rc_am.run_command('/bin/false', check_rc=True)
assert rc_am.fail_json.called
args, kwargs = rc_am.fail_json.call_args
assert kwargs['rc'] == 1
class TestRunCommandOutput:
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_text_stdin(self, rc_am):
(rc, stdout, stderr) = rc_am.run_command('/bin/foo', data='hello world')
assert rc_am._subprocess.Popen.return_value.stdin.getvalue() == b'hello world\n'
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_ascii_stdout(self, mocker, rc_am):
rc_am._os._cmd_out[mocker.sentinel.stdout] = BytesIO(b'hello')
(rc, stdout, stderr) = rc_am.run_command('/bin/cat hello.txt')
assert rc == 0
# module_utils function. On py3 it returns text and py2 it returns
# bytes because it's returning native strings
assert stdout == 'hello'
@pytest.mark.parametrize('stdin', [{}], indirect=['stdin'])
def test_utf8_output(self, mocker, rc_am):
rc_am._os._cmd_out[mocker.sentinel.stdout] = BytesIO(u'Žarn§'.encode('utf-8'))
rc_am._os._cmd_out[mocker.sentinel.stderr] = BytesIO(u'لرئيسية'.encode('utf-8'))
(rc, stdout, stderr) = rc_am.run_command('/bin/something_ugly')
assert rc == 0
# module_utils function. On py3 it returns text and py2 it returns
# bytes because it's returning native strings
assert stdout == to_native(u'Žarn§')
assert stderr == to_native(u'لرئيسية')