+++ /dev/null
-# Copyright (c) 2016 Cisco and/or its affiliates.
-# 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.
-
-"""VAT executor library."""
-
-import json
-
-from robot.api import logger
-
-from resources.libraries.python.ssh import SSH
-from resources.libraries.python.constants import Constants
-
-
-__all__ = ['VatExecutor']
-
-
-def cleanup_vat_json_output(json_output):
- """Return VAT JSON output cleaned from VAT clutter.
-
- Clean up VAT JSON output from clutter like vat# prompts and such.
-
- :param json_output: Cluttered JSON output.
- :return: Cleaned up output JSON string.
- """
-
- retval = json_output
- clutter = ['vat#', 'dump_interface_table error: Misc']
- for garbage in clutter:
- retval = retval.replace(garbage, '')
- return retval
-
-
-class VatExecutor(object):
- """Contains methods for executing VAT commands on DUTs."""
- def __init__(self):
- self._stdout = None
- self._stderr = None
- self._ret_code = None
-
- def execute_script(self, vat_name, node, timeout=10, json_out=True):
- """Copy local_path script to node, execute it and return result.
-
- :param vat_name: Name of the vat script file. Only the file name of
- the script is required, the resources path is prepended automatically.
- :param node: Node to execute the VAT script on.
- :param timeout: Seconds to allow the script to run.
- :param json_out: Require JSON output.
- :return: (rc, stdout, stderr) tuple.
- """
-
- ssh = SSH()
- ssh.connect(node)
-
- remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR,
- Constants.RESOURCES_TPL_VAT,
- vat_name)
- # TODO this overwrites the output if the vat script has been used twice
- # remote_file_out = remote_file_path + ".out"
-
- cmd = "sudo -S {vat} {json} < {input}".format(
- vat=Constants.VAT_BIN_NAME,
- json="json" if json_out is True else "",
- input=remote_file_path)
- (ret_code, stdout, stderr) = ssh.exec_command(cmd, timeout)
- self._ret_code = ret_code
- self._stdout = stdout
- self._stderr = stderr
-
- logger.trace("Command '{0}' returned {1}'".format(cmd, self._ret_code))
- logger.trace("stdout: '{0}'".format(self._stdout))
- logger.trace("stderr: '{0}'".format(self._stderr))
-
- # TODO: download vpp_api_test output file
- # self._delete_files(node, remote_file_path, remote_file_out)
-
- def execute_script_json_out(self, vat_name, node, timeout=10):
- """Pass all arguments to 'execute_script' method, then cleanup returned
- json output."""
- self.execute_script(vat_name, node, timeout, json_out=True)
- self._stdout = cleanup_vat_json_output(self._stdout)
-
- @staticmethod
- def _delete_files(node, *files):
- """Use SSH to delete the specified files on node.
-
- :param node: Node in topology.
- :param files: Files to delete.
- :type node: dict
- :type files: iterable
- """
-
- ssh = SSH()
- ssh.connect(node)
- files = " ".join([str(x) for x in files])
- ssh.exec_command("rm {0}".format(files))
-
- def script_should_have_failed(self):
- """Read return code from last executed script and raise exception if the
- script didn't fail."""
- if self._ret_code is None:
- raise Exception("First execute the script!")
- if self._ret_code == 0:
- raise AssertionError(
- "Script execution passed, but failure was expected")
-
- def script_should_have_passed(self):
- """Read return code from last executed script and raise exception if the
- script failed."""
- if self._ret_code is None:
- raise Exception("First execute the script!")
- if self._ret_code != 0:
- raise AssertionError(
- "Script execution failed, but success was expected")
-
- def get_script_stdout(self):
- """Returns value of stdout from last executed script."""
- return self._stdout
-
- def get_script_stderr(self):
- """Returns value of stderr from last executed script."""
- return self._stderr
-
- @staticmethod
- def cmd_from_template(node, vat_template_file, **vat_args):
- """Execute VAT script on specified node. This method supports
- script templates with parameters.
-
- :param node: Node in topology on witch the script is executed.
- :param vat_template_file: Template file of VAT script.
- :param vat_args: Arguments to the template file.
- :return: List of JSON objects returned by VAT.
- """
- with VatTerminal(node) as vat:
- return vat.vat_terminal_exec_cmd_from_template(vat_template_file,
- **vat_args)
-
-
-class VatTerminal(object):
- """VAT interactive terminal.
-
- :param node: Node to open VAT terminal on.
- :param json_param: Defines if outputs from VAT are in JSON format.
- Default is True.
- :type node: dict
- :type json_param: bool
-
- """
-
- __VAT_PROMPT = "vat# "
- __LINUX_PROMPT = ":~$ "
-
- def __init__(self, node, json_param=True):
- json_text = ' json' if json_param else ''
- self.json = json_param
- self._ssh = SSH()
- self._ssh.connect(node)
- self._tty = self._ssh.interactive_terminal_open()
- self._ssh.interactive_terminal_exec_command(
- self._tty,
- 'sudo -S {}{}'.format(Constants.VAT_BIN_NAME, json_text),
- self.__VAT_PROMPT)
- self._exec_failure = False
-
- def __enter__(self):
- return self
-
- def __exit__(self, exc_type, exc_val, exc_tb):
- self.vat_terminal_close()
-
- def vat_terminal_exec_cmd(self, cmd):
- """Execute command on the opened VAT terminal.
-
- :param cmd: Command to be executed.
-
- :return: Command output in python representation of JSON format or
- None if not in JSON mode.
- """
- logger.debug("Executing command in VAT terminal: {}".format(cmd))
- try:
- out = self._ssh.interactive_terminal_exec_command(self._tty,
- cmd,
- self.__VAT_PROMPT)
- except:
- self._exec_failure = True
- raise
-
- logger.debug("VAT output: {}".format(out))
- if self.json:
- obj_start = out.find('{')
- obj_end = out.rfind('}')
- array_start = out.find('[')
- array_end = out.rfind(']')
-
- if -1 == obj_start and -1 == array_start:
- raise RuntimeError("VAT: no JSON data.")
-
- if obj_start < array_start or -1 == array_start:
- start = obj_start
- end = obj_end + 1
- else:
- start = array_start
- end = array_end + 1
- out = out[start:end]
- json_out = json.loads(out)
- return json_out
- else:
- return None
-
- def vat_terminal_close(self):
- """Close VAT terminal."""
- #interactive terminal is dead, we only need to close session
- if not self._exec_failure:
- self._ssh.interactive_terminal_exec_command(self._tty,
- 'quit',
- self.__LINUX_PROMPT)
- self._ssh.interactive_terminal_close(self._tty)
-
- def vat_terminal_exec_cmd_from_template(self, vat_template_file, **args):
- """Execute VAT script from a file.
-
- :param vat_template_file: Template file name of a VAT script.
- :param args: Dictionary of parameters for VAT script.
- :return: List of JSON objects returned by VAT.
- """
- file_path = '{}/{}'.format(Constants.RESOURCES_TPL_VAT,
- vat_template_file)
- with open(file_path, 'r') as template_file:
- cmd_template = template_file.readlines()
- ret = []
- for line_tmpl in cmd_template:
- vat_cmd = line_tmpl.format(**args)
- ret.append(self.vat_terminal_exec_cmd(vat_cmd.replace('\n', '')))
- return ret
Code Review / csit.git / blobdiff