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#!/usr/bin/env python3
# THIS FILE IS PART OF THE CYLC WORKFLOW ENGINE.
# Copyright (C) NIWA & British Crown (Met Office) & Contributors.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import json
import os
from psutil import Process
from cylc.flow.scripts.psutil import _psutil
def test_psutil_basic():
"""It should return measurements."""
# obtain memory reading
ret = _psutil('[["virtual_memory"]]')
# we asked for one thing so we should get one response
assert len(ret) == 1
# the result should be dict-like and serialise to json
mem = ret[0]
dict(mem)
json.dumps(mem)
for key in ('total', 'available', 'used', 'free'):
# it should have multiple fields
assert key in mem
# all of which should be integers
assert isinstance(mem[key], int)
def test_psutil_object():
"""It should call object methods."""
# obtain the commandline for this test process
ret = _psutil(f'[["Process.cmdline", {os.getpid()}]]')
assert ret[0] == Process().cmdline()
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