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#!/usr/bin/env python
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
import struct
import sys
import unittest
from unittest import mock
from cliff import utils
from cliff.tests import base
class TestTerminalWidth(base.TestBase):
def test(self):
width = utils.terminal_width(sys.stdout)
# Results are specific to the execution environment, so only assert
# that no error is raised.
if width is not None:
self.assertIsInstance(width, int)
@unittest.skipIf(not hasattr(os, 'get_terminal_size'),
'only needed for python 3.3 onwards')
@mock.patch('cliff.utils.os')
def test_get_terminal_size(self, mock_os):
ts = os.terminal_size((10, 5))
mock_os.get_terminal_size.return_value = ts
width = utils.terminal_width(sys.stdout)
self.assertEqual(10, width)
mock_os.get_terminal_size.side_effect = OSError()
width = utils.terminal_width(sys.stdout)
self.assertIs(None, width)
@unittest.skipIf(hasattr(os, 'get_terminal_size'),
'only needed for python 3.2 and before')
@mock.patch('fcntl.ioctl')
def test_ioctl(self, mock_ioctl):
mock_ioctl.return_value = struct.pack('hhhh', 57, 101, 0, 0)
width = utils.terminal_width(sys.stdout)
self.assertEqual(101, width)
mock_ioctl.side_effect = IOError()
width = utils.terminal_width(sys.stdout)
self.assertIs(None, width)
@unittest.skipIf(hasattr(os, 'get_terminal_size'),
'only needed for python 3.2 and before')
@mock.patch('cliff.utils.ctypes')
@mock.patch('sys.platform', 'win32')
def test_windows(self, mock_ctypes):
mock_ctypes.create_string_buffer.return_value.raw = struct.pack(
'hhhhHhhhhhh', 101, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
mock_ctypes.windll.kernel32.GetStdHandle.return_value = -11
mock_ctypes.windll.kernel32.GetConsoleScreenBufferInfo.return_value = 1
width = utils.terminal_width(sys.stdout)
self.assertEqual(101, width)
mock_ctypes.windll.kernel32.GetConsoleScreenBufferInfo.return_value = 0
width = utils.terminal_width(sys.stdout)
self.assertIs(None, width)
width = utils.terminal_width('foo')
self.assertIs(None, width)
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