#!/usr/bin/env python
#
# Copyright (C) 2017 The Android Open Source Project
#
# 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 logging
import re
from vts.runners.host import asserts
from vts.runners.host import base_test
from vts.runners.host import test_runner
from vts.utils.python.controllers import android_device
from vts.utils.python.file import file_utils
class KernelApiSysfsTest(base_test.BaseTestClass):
'''Test cases which check sysfs files.'''
def setUpClass(self):
self.dut = self.registerController(android_device)[0]
self.dut.shell.InvokeTerminal(
'default') # creates a remote shell instance.
self.shell = self.dut.shell.default
def ConvertToInteger(self, text):
'''Check whether a given text is interger.
Args:
text: object, usually a string representing the content of a file
Returns:
bool, True if is integer
'''
try:
return int(text)
except ValueError as e:
logging.exception(e)
asserts.fail('Content "%s" is not integer' % text)
def MatchRegex(self, regex, string):
'''Check whether a string completely matches a given regex.
Assertions will fail if given string is not a complete match.
Args:
regex: string, regex pattern to match
string: string, given string for matching
'''
pattern = re.compile(regex)
match = pattern.match(string)
message = 'String "%s" is not a complete match of regex "%s".' % (
string, regex)
asserts.assertTrue(match is not None, message)
asserts.assertEqual(match.start(), 0, message)
asserts.assertEqual(match.end(), len(string), message)
def IsReadOnly(self, path):
'''Check whether a given path is read only.
Assertion will fail if given path does not exist or is not read only.
'''
permission = ''
try:
permission = file_utils.GetPermission(path, self.shell)
except IOError as e:
logging.exception(e)
asserts.fail('Path "%s" does not exist or has invalid '
'permission bits' % path)
try:
asserts.assertTrue(
file_utils.IsReadOnly(permission),
'path %s is not read only' % path)
except IOError as e:
logging.exception(e)
asserts.fail('Got invalid permission bits "%s" for path "%s"' %
(permission, path))
def testCpuOnlineFormat(self):
'''Check the format of cpu online file.
Confirm /sys/devices/system/cpu/online exists and is read-only.
Parse contents to ensure it is a comma-separated series of ranges
(%d-%d) and/or integers.
'''
filepath = '/sys/devices/system/cpu/online'
self.IsReadOnly(filepath)
content = file_utils.ReadFileContent(filepath, self.shell)
regex = '(\d+(-\d+)?)(,\d+(-\d+)?)*'
if content.endswith('\n'):
content = content[:-1]
self.MatchRegex(regex, content)
def testLastResumeReason(self):
'''Check /sys/kernel/wakeup_reasons/last_resume_reason.'''
filepath = '/sys/kernel/wakeup_reasons/last_resume_reason'
self.IsReadOnly(filepath)
def testKernelMax(self):
'''Check the value of /sys/devices/system/cpu/kernel_max.'''
filepath = '/sys/devices/system/cpu/kernel_max'
self.IsReadOnly(filepath)
content = file_utils.ReadFileContent(filepath, self.shell)
self.ConvertToInteger(content)
if __name__ == "__main__":
test_runner.main()