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1# Copyright 2014 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
5import os
6import tempfile
7import unittest
8import zipfile
9
10from profile_chrome import profiler
11from profile_chrome import ui
12
13
14class FakeController(object):
15  def __init__(self, contents='fake-contents'):
16    self.contents = contents
17    self.interval = None
18    self.stopped = False
19    self.filename = None
20
21  def StartTracing(self, interval):
22    self.interval = interval
23
24  def StopTracing(self):
25    self.stopped = True
26
27  def PullTrace(self):
28    with tempfile.NamedTemporaryFile(delete=False) as f:
29      self.filename = f.name
30      f.write(self.contents)
31      return f.name
32
33  def __repr__(self):
34    return 'faketrace'
35
36
37class ProfilerTest(unittest.TestCase):
38  def setUp(self):
39    ui.EnableTestMode()
40
41  def testCaptureBasicProfile(self):
42    controller = FakeController()
43    interval = 1.5
44    result = profiler.CaptureProfile([controller], interval)
45
46    try:
47      self.assertEquals(controller.interval, interval)
48      self.assertTrue(controller.stopped)
49      self.assertTrue(os.path.exists(result))
50      self.assertFalse(os.path.exists(controller.filename))
51      self.assertTrue(result.endswith('.html'))
52    finally:
53      os.remove(result)
54
55  def testCaptureJsonProfile(self):
56    controller = FakeController()
57    result = profiler.CaptureProfile([controller], 1, write_json=True)
58
59    try:
60      self.assertFalse(result.endswith('.html'))
61      with open(result) as f:
62        self.assertEquals(f.read(), controller.contents)
63    finally:
64      os.remove(result)
65
66  def testCaptureMultipleProfiles(self):
67    controllers = [FakeController('c1'), FakeController('c2')]
68    result = profiler.CaptureProfile(controllers, 1, write_json=True)
69
70    try:
71      self.assertTrue(result.endswith('.zip'))
72      self.assertTrue(zipfile.is_zipfile(result))
73      with zipfile.ZipFile(result) as f:
74        self.assertEquals(
75            f.namelist(),
76            [controllers[0].filename[1:], controllers[1].filename[1:]])
77    finally:
78      os.remove(result)
79