src/tools/telemetry/telemetry/core/platform/profiler/perf_profiler_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 import os
   5 import logging
   6 import unittest
   7
   8 from telemetry.core import util
   9 from telemetry.core.platform.profiler import perf_profiler
  10 from telemetry.unittest import options_for_unittests
  11 from telemetry.unittest import simple_mock
  12
  13 class TestPerfProfiler(unittest.TestCase):
  14   def testPerfProfiler(self):
  15     options = options_for_unittests.GetCopy()
  16     if not perf_profiler.PerfProfiler.is_supported(options.browser_type):
  17       logging.warning('PerfProfiler is not supported. Skipping test')
  18       return
  19
  20     profile_file = os.path.join(
  21         util.GetUnittestDataDir(), 'perf_report_output.txt')
  22     perf_report_output = open(profile_file, 'r').read()
  23
  24     mock_popen = simple_mock.MockObject()
  25     mock_popen.ExpectCall('communicate').WillReturn([perf_report_output])
  26
  27     mock_subprocess = simple_mock.MockObject()
  28     mock_subprocess.ExpectCall(
  29         'Popen').WithArgs(simple_mock.DONT_CARE).WillReturn(mock_popen)
  30     setattr(mock_subprocess, 'PIPE', simple_mock.MockObject())
  31
  32     real_subprocess = perf_profiler.subprocess
  33     perf_profiler.subprocess = mock_subprocess
  34     try:
  35       self.assertEqual(
  36           perf_profiler.PerfProfiler.GetTopSamples('linux', profile_file, 10),
  37           { 'v8::internal::StaticMarkingVisitor::MarkMapContents': 63615201,
  38             'v8::internal::RelocIterator::next': 38271931,
  39             'v8::internal::LAllocator::MeetConstraintsBetween': 42913933,
  40             'v8::internal::FlexibleBodyVisitor::Visit': 31909537,
  41             'v8::internal::LiveRange::CreateAssignedOperand': 42913933,
  42             'void v8::internal::RelocInfo::Visit': 96878864,
  43             'WebCore::HTMLTokenizer::nextToken': 48240439,
  44             'v8::internal::Scanner::ScanIdentifierOrKeyword': 46054550,
  45             'sk_memset32_SSE2': 45121317,
  46             'v8::internal::HeapObject::Size': 39786862
  47             })
  48     finally:
  49       perf_profiler.subprocess = real_subprocess