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# Copyright 2016 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 re
import logging
import subprocess
import locale
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
def __init__(self):
""" TestStepsTools initialization
"""
self._logger = logging.getLogger(__name__)
def Assert(self, condition):
""" Evaluate given `condition' and raise AssertionError
in case, that evaluation fails
"""
try:
assert self.Eval(condition)
except AssertionError:
self._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(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:
for line in output.split('\n'):
result = re.findall(regex, line)
if result:
return result
return []
return output
@staticmethod
def validate_Exec(result, dummy_command, dummy_regex=None):
""" validate result of shell `command' execution
"""
return result is not None
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