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# Copyright 2017 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Unit tests for StatsManager."""
from __future__ import print_function
import os
import shutil
import tempfile
import unittest
from stats_manager import StatsManager
class TestStatsManager(unittest.TestCase):
"""Test to verify StatsManager methods work as expected.
StatsManager should collect raw data, calculate their statistics, and save
them in expected format.
"""
def setUp(self):
"""Set up data and create a temporary directory to save data and stats."""
self.tempdir = tempfile.mkdtemp()
self.data = StatsManager()
self.data.AddValue('A', 99999.5)
self.data.AddValue('A', 100000.5)
self.data.AddValue('A', 'ERROR')
self.data.AddValue('B', 1.5)
self.data.AddValue('B', 2.5)
self.data.AddValue('B', 3.5)
self.data.CalculateStats()
def tearDown(self):
"""Delete the temporary directory and its content."""
shutil.rmtree(self.tempdir)
def test_GetRawData(self):
raw_data = self.data.GetRawData()
self.assertListEqual([99999.5, 100000.5], raw_data['A'])
self.assertListEqual([1.5, 2.5, 3.5], raw_data['B'])
def test_GetSummary(self):
summary = self.data.GetSummary()
self.assertEqual(2, summary['A']['count'])
self.assertAlmostEqual(100000.5, summary['A']['max'])
self.assertAlmostEqual(99999.5, summary['A']['min'])
self.assertAlmostEqual(0.5, summary['A']['stddev'])
self.assertAlmostEqual(100000.0, summary['A']['mean'])
self.assertEqual(3, summary['B']['count'])
self.assertAlmostEqual(3.5, summary['B']['max'])
self.assertAlmostEqual(1.5, summary['B']['min'])
self.assertAlmostEqual(0.81649658092773, summary['B']['stddev'])
self.assertAlmostEqual(2.5, summary['B']['mean'])
def test_SaveRawData(self):
dirname = 'unittest_raw_data'
self.data.SaveRawData(self.tempdir, dirname)
dirname = os.path.join(self.tempdir, dirname)
fileA = os.path.join(dirname, 'A.txt')
fileB = os.path.join(dirname, 'B.txt')
with open(fileA, 'r') as fA:
self.assertEqual('99999.50', fA.readline().strip())
self.assertEqual('100000.50', fA.readline().strip())
with open(fileB, 'r') as fB:
self.assertEqual('1.50', fB.readline().strip())
self.assertEqual('2.50', fB.readline().strip())
self.assertEqual('3.50', fB.readline().strip())
def test_SaveSummary(self):
fname = 'unittest_summary.txt'
self.data.SaveSummary(self.tempdir, fname)
fname = os.path.join(self.tempdir, fname)
with open(fname, 'r') as f:
self.assertEqual(
'@@ NAME COUNT MEAN STDDEV MAX MIN\n',
f.readline())
self.assertEqual(
'@@ A 2 100000.00 0.50 100000.50 99999.50\n',
f.readline())
self.assertEqual(
'@@ B 3 2.50 0.82 3.50 1.50\n',
f.readline())
if __name__ == '__main__':
unittest.main()
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