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# Copyright 2016-2017 Intel Corporation.
#
# 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.
"""Various helper functions for step driven testcases
"""
import logging
import subprocess
import locale
from tools.functions import filter_output
from tools.tasks import run_background_task
_LOGGER = logging.getLogger(__name__)
class TestStepsTools(object):
""" Various tools and functions used by step driven testcases
"""
# Functions use nonstandard names to avoid conflicts with
# standard python keywords.
# pylint: disable=invalid-name
@staticmethod
def Assert(condition):
""" Evaluate given `condition' and raise AssertionError
in case, that evaluation fails
"""
try:
assert TestStepsTools.Eval(condition)
except AssertionError:
_LOGGER.error('Condition %s is not True', condition)
raise
return True
@staticmethod
def validate_Assert(result, _dummy_condition):
""" Validate evaluation of given `condition'
"""
return result
@staticmethod
def Eval(expression):
""" Evaluate python `expression' and return its result
"""
# pylint: disable=eval-used
return eval(expression)
@staticmethod
def validate_Eval(result, _dummy_expression):
""" Validate result of python `expression' evaluation
"""
return result is not None
@staticmethod
def Exec_Python(code):
""" Execute a python `code' and return True on success
"""
# pylint: disable=exec-used
try:
exec(code, globals())
# pylint: disable=broad-except
# pylint: disable=bare-except
except:
_LOGGER.error('Execution of following code has failed %s', code)
return False
return True
@staticmethod
def validate_Exec_Python(result, _dummy_code):
""" Validate result of python `code' execution
"""
return result
@staticmethod
def Exec_Shell(command, regex=None):
""" Execute a shell `command' and return its output filtered
out by optional `regex' expression.
"""
try:
output = subprocess.check_output(command, shell=True)
except OSError:
return None
output = output.decode(locale.getdefaultlocale()[1])
if regex:
return filter_output(output, regex)
return output
@staticmethod
def validate_Exec_Shell(result, _dummy_command, _dummy_regex=None):
""" validate result of shell `command' execution
"""
return result is not None
@staticmethod
def Exec_Shell_Background(command):
""" Execute a shell `command' at the background and return its PID id
"""
try:
pid = run_background_task(command.split(), _LOGGER, "Background task: {}".format(command))
return pid
except OSError:
return None
@staticmethod
def validate_Exec_Shell_Background(result, _dummy_command, _dummy_regex=None):
""" validate result of shell `command' execution on the background
"""
return result is not None
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