# See the License for the specific language governing permissions and
# limitations under the License.
-"""Python API executor library."""
+"""Python API executor library.
+
+This version supports only simple request / reply VPP API methods.
+
+TODO:
+ - Implement:
+ - Dump functions
+ - vpp-stats
+
+"""
import binascii
import json
from resources.libraries.python.ssh import SSH, SSHTimeout
from resources.libraries.python.PapiHistory import PapiHistory
+
__all__ = ["PapiExecutor", "PapiResponse"]
code.
"""
- def __init__(self, papi_reply=None, stdout="", stderr="", ret_code=None):
+ def __init__(self, papi_reply=None, stdout="", stderr="", ret_code=None,
+ requests=None):
"""Construct the Papi response by setting the values needed.
:param papi_reply: API reply from last executed PAPI command(s).
:param stdout: stdout from last executed PAPI command(s).
:param stderr: stderr from last executed PAPI command(s).
:param ret_code: ret_code from last executed PAPI command(s).
+ :param requests: List of used PAPI requests. It is used while verifying
+ replies. If None, expected replies must be provided for verify_reply
+ and verify_replies methods.
:type papi_reply: list
:type stdout: str
:type stderr: str
:type ret_code: int
+ :type requests: list
"""
- # API reply from last executed PAPI command(s)
+ # API reply from last executed PAPI command(s).
self.reply = papi_reply
- # stdout from last executed PAPI command(s)
+ # stdout from last executed PAPI command(s).
self.stdout = stdout
# stderr from last executed PAPI command(s).
self.stderr = stderr
- # return code from last executed PAPI command(s)
+ # return code from last executed PAPI command(s).
self.ret_code = ret_code
+ # List of used PAPI requests.
+ self.requests = requests
+
+ # List of expected PAPI replies. It is used while verifying replies.
+ if self.requests:
+ self.expected_replies = \
+ ["{rqst}_reply".format(rqst=rqst) for rqst in self.requests]
+
def __str__(self):
- """Return string with human readable description of the group.
+ """Return string with human readable description of the PapiResponse.
:returns: Readable description.
:rtype: str
"""
- return ("papi_reply={papi_reply} "
- "stdout={stdout} "
- "stderr={stderr} "
- "ret_code={ret_code}".
+ return ("papi_reply={papi_reply},"
+ "stdout={stdout},"
+ "stderr={stderr},"
+ "ret_code={ret_code},"
+ "requests={requests}".
format(papi_reply=self.reply,
stdout=self.stdout,
stderr=self.stderr,
- ret_code=self.ret_code))
+ ret_code=self.ret_code,
+ requests=self.requests))
def __repr__(self):
"""Return string executable as Python constructor call.
:returns: Executable constructor call.
:rtype: str
"""
- return ("PapiResponse(papi_reply={papi_reply} "
- "stdout={stdout} "
- "stderr={stderr} "
- "ret_code={ret_code})".
- format(papi_reply=self.reply,
- stdout=self.stdout,
- stderr=self.stderr,
- ret_code=self.ret_code))
+ return "PapiResponse({str})".format(str=str(self))
+
+ def verify_reply(self, cmd_reply=None, idx=0,
+ err_msg="Failed to verify PAPI reply."):
+ """Verify and return data from the PAPI response.
+
+ Note: Use only with a simple request / reply command. In this case the
+ PAPI reply includes 'retval' which is checked in this method.
+
+ Use if PAPI response includes only one command reply.
+
+ Use it this way (preferred):
+
+ with PapiExecutor(node) as papi_exec:
+ data = papi_exec.add('show_version').execute_should_pass().\
+ verify_reply()
+
+ or if you must provide the expected reply (not recommended):
+
+ with PapiExecutor(node) as papi_exec:
+ data = papi_exec.add('show_version').execute_should_pass().\
+ verify_reply('show_version_reply')
+
+ :param cmd_reply: PAPI reply. If None, list of 'requests' should have
+ been provided to the __init__ method as pre-generated list of
+ replies is used in this method in this case.
+ The .execute* methods are providing the requests automatically.
+ :param idx: Index to PapiResponse.reply list.
+ :param err_msg: The message used if the verification fails.
+ :type cmd_reply: str
+ :type idx: int
+ :type err_msg: str or None
+ :returns: Verified data from PAPI response.
+ :rtype: dict
+ :raises AssertionError: If the PAPI return value is not 0, so the reply
+ is not valid.
+ :raises KeyError, IndexError: If the reply does not have expected
+ structure.
+ """
+ cmd_rpl = self.expected_replies[idx] if cmd_reply is None else cmd_reply
+
+ data = self.reply[idx]['api_reply'][cmd_rpl]
+ if data['retval'] != 0:
+ raise AssertionError("{msg}\nidx={idx}, cmd_reply={reply}".
+ format(msg=err_msg, idx=idx, reply=cmd_rpl))
+
+ return data
+
+ def verify_replies(self, cmd_replies=None,
+ err_msg="Failed to verify PAPI reply."):
+ """Verify and return data from the PAPI response.
+
+ Note: Use only with request / reply commands. In this case each
+ PAPI reply includes 'retval' which is checked.
+
+ Use if PAPI response includes more than one command reply.
+
+ Use it this way:
+
+ with PapiExecutor(node) as papi_exec:
+ papi_exec.add(cmd1, **args1).add(cmd2, **args2).add(cmd2, **args3).\
+ execute_should_pass(err_msg).verify_replies()
+
+ or if you need the data from the PAPI response:
+
+ with PapiExecutor(node) as papi_exec:
+ data = papi_exec.add(cmd1, **args1).add(cmd2, **args2).\
+ add(cmd2, **args3).execute_should_pass(err_msg).verify_replies()
+
+ or if you must provide the list of expected replies (not recommended):
+
+ with PapiExecutor(node) as papi_exec:
+ data = papi_exec.add(cmd1, **args1).add(cmd2, **args2).\
+ add(cmd2, **args3).execute_should_pass(err_msg).\
+ verify_replies(cmd_replies=cmd_replies)
+
+ :param cmd_replies: List of PAPI command replies. If None, list of
+ 'requests' should have been provided to the __init__ method as
+ pre-generated list of replies is used in this method in this case.
+ The .execute* methods are providing the requests automatically.
+ :param err_msg: The message used if the verification fails.
+ :type cmd_replies: list of str or None
+ :type err_msg: str
+ :returns: List of verified data from PAPI response.
+ :rtype list
+ :raises AssertionError: If the PAPI response does not include at least
+ one of specified command replies.
+ """
+ data = list()
+
+ cmd_rpls = self.expected_replies if cmd_replies is None else cmd_replies
+
+ if len(self.reply) != len(cmd_rpls):
+ raise AssertionError(err_msg)
+ for idx, cmd_reply in enumerate(cmd_rpls):
+ data.append(self.verify_reply(cmd_reply, idx, err_msg))
+
+ return data
class PapiExecutor(object):
# The list of PAPI commands to be executed on the node.
self._api_command_list = list()
- # The response on the PAPI commands.
- self.response = PapiResponse()
-
self._ssh = SSH()
def __enter__(self):
papi_reply = list()
if process_reply:
- json_data = json.loads(stdout)
+ try:
+ json_data = json.loads(stdout)
+ except ValueError:
+ logger.error("An error occured while processing the PAPI "
+ "request:\n{rqst}".format(rqst=local_list))
+ raise
for data in json_data:
try:
api_reply_processed = dict(
return PapiResponse(papi_reply=papi_reply,
stdout=stdout,
stderr=stderr,
- ret_code=ret_code)
+ ret_code=ret_code,
+ requests=[rqst["api_name"] for rqst in local_list])
def execute_should_pass(self, err_msg="Failed to execute PAPI command.",
process_reply=True, ignore_errors=False,
"""Execute the PAPI commands and check the return code.
Raise exception if the PAPI command(s) failed.
- Note: There are two exceptions raised to distinguish two situations. If
- not needed, re-implement using only RuntimeError.
-
:param err_msg: The message used if the PAPI command(s) execution fails.
:param process_reply: Indicate whether or not to process PAPI reply.
:param ignore_errors: If true, the errors in the reply are ignored.
:returns: Papi response including: papi reply, stdout, stderr and
return code.
:rtype: PapiResponse
- :raises RuntimeError: If no PAPI command(s) executed.
- :raises AssertionError: If PAPI command(s) execution passed.
+ :raises AssertionError: If PAPI command(s) execution failed.
"""
response = self.execute(process_reply=process_reply,
It does not return anything as we expect it fails.
- Note: There are two exceptions raised to distinguish two situations. If
- not needed, re-implement using only RuntimeError.
-
:param err_msg: The message used if the PAPI command(s) execution fails.
:param process_reply: Indicate whether or not to process PAPI reply.
:param ignore_errors: If true, the errors in the reply are ignored.
:type process_reply: bool
:type ignore_errors: bool
:type timeout: int
- :raises RuntimeError: If no PAPI command(s) executed.
:raises AssertionError: If PAPI command(s) execution passed.
"""
api_data_processed = self._process_api_data(api_data)
json_data = json.dumps(api_data_processed)
- cmd = "python {fw_dir}/{papi_provider} --json_data '{json}'".format(
+ cmd = "{fw_dir}/{papi_provider} --json_data '{json}'".format(
fw_dir=Constants.REMOTE_FW_DIR,
papi_provider=Constants.RESOURCES_PAPI_PROVIDER,
json=json_data)
Code Review / csit.git / blobdiff