startop: Add test for trace_analyzer

#!/usr/bin/env python3

#

# Copyright 2019, The Android Open Source Project

#

# 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.

#

"""

Unit tests for trace_analyzer module.

Install:

  $> sudo apt-get install python3-pytest   ##  OR

  $> pip install -U pytest

See also https://docs.pytest.org/en/latest/getting-started.html

Usage:

  $> pytest trace_analyzer_test.py

See also https://docs.pytest.org/en/latest/usage.html

"""

# global imports

import os

import sys

DIR = os.path.abspath(os.path.dirname(__file__))

sys.path.append(os.path.dirname(DIR))

import lib.cmd_utils as cmd_utils

def test_trace_analyzer(tmpdir):

  # Setup

  bin = os.path.join(DIR, 'trace_analyzer')

  systrace = os.path.join(DIR, 'test_fixtures/common_systrace')

  db_file = tmpdir.mkdir('trace_analyzer').join('test.db')

  # Act

  passed, output = cmd_utils.execute_arbitrary_command([bin, systrace,

                                                        str(db_file)],

                                                       timeout=300,

                                                       shell=False,

                                                       simulate=False)

  # Assert

  assert passed

  assert output == """\

'blocked_iowait_duration_ms',\

'process_name',\

'launching_duration_ms',\

'launching_started_timestamp_ms',\

'launching_finished_timestamp_ms'

81.697999999960302375,\

'com.google.android.dialer',\

594.99400000095192808,\

14594219.85600000061,\

14594814.85000000149"""