build/android/pylib/perf/surface_stats_collector_unittest.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 """Unittests for SurfaceStatsCollector."""
   6 # pylint: disable=W0212
   7
   8 import unittest
   9
  10 from pylib.perf.surface_stats_collector import SurfaceStatsCollector
  11
  12
  13 class TestSurfaceStatsCollector(unittest.TestCase):
  14   @staticmethod
  15   def _CreateUniformTimestamps(base, num, delta):
  16     return [base + i * delta for i in range(1, num + 1)]
  17
  18   @staticmethod
  19   def _CreateDictionaryFromResults(results):
  20     dictionary = {}
  21     for result in results:
  22       dictionary[result.name] = result
  23     return dictionary
  24
  25   def setUp(self):
  26     self.refresh_period = 0.1
  27
  28   def testOneFrameDelta(self):
  29     timestamps = self._CreateUniformTimestamps(0, 10, self.refresh_period)
  30     results = self._CreateDictionaryFromResults(
  31                   SurfaceStatsCollector._CalculateResults(
  32                       self.refresh_period, timestamps, ''))
  33
  34     self.assertEquals(results['avg_surface_fps'].value,
  35                       int(round(1 / self.refresh_period)))
  36     self.assertEquals(results['jank_count'].value, 0)
  37     self.assertEquals(results['max_frame_delay'].value, 1)
  38     self.assertEquals(len(results['frame_lengths'].value), len(timestamps) - 1)
  39
  40   def testAllFramesTooShort(self):
  41     timestamps = self._CreateUniformTimestamps(0, 10, self.refresh_period / 100)
  42     self.assertRaises(Exception,
  43                       SurfaceStatsCollector._CalculateResults,
  44                       [self.refresh_period, timestamps, ''])
  45
  46   def testSomeFramesTooShort(self):
  47     timestamps = self._CreateUniformTimestamps(0, 5, self.refresh_period)
  48     # The following timestamps should be skipped.
  49     timestamps += self._CreateUniformTimestamps(timestamps[4],
  50                                                 5,
  51                                                 self.refresh_period / 100)
  52     timestamps += self._CreateUniformTimestamps(timestamps[4],
  53                                                 5,
  54                                                 self.refresh_period)
  55
  56     results = self._CreateDictionaryFromResults(
  57                   SurfaceStatsCollector._CalculateResults(
  58                       self.refresh_period, timestamps, ''))
  59
  60     self.assertEquals(len(results['frame_lengths'].value), 9)
  61
  62
  63 if __name__ == '__main__':
  64   unittest.main()