← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to bzrlib/tests/test_lsprof.py

  • Committer: Danny van Heumen
  • Date: 2010-03-09 21:42:11 UTC
  • mto: (4634.139.5 2.0)
  • mto: This revision was merged to the branch mainline in revision 5160.
  • Revision ID: danny@dannyvanheumen.nl-20100309214211-iqh42x6qcikgd9p3
Reverted now-useless TODO list.

Show diffs side-by-side

added added

removed removed

Lines of Context:
bzrlib/tests/test_lsprof.py
1
 
# Copyright (C) 2007, 2009, 2010 Canonical Ltd
 
1
# Copyright (C) 2005, 2006 Canonical Ltd
2
2
#
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
19
19
 
20
20
import cPickle
21
21
import os
22
 
import threading
23
22
 
24
23
import bzrlib
25
 
from bzrlib import errors, tests
 
24
from bzrlib import tests
26
25
 
27
26
 
28
27
class _LSProfFeature(tests.Feature):
93
92
        self.stats.save(f)
94
93
        data1 = cPickle.load(open(f))
95
94
        self.assertEqual(type(data1), bzrlib.lsprof.Stats)
96
 
 
97
 
 
98
 
class TestBzrProfiler(tests.TestCase):
99
 
 
100
 
    _test_needs_features = [LSProfFeature]
101
 
 
102
 
    def test_start_call_stuff_stop(self):
103
 
        profiler = bzrlib.lsprof.BzrProfiler()
104
 
        profiler.start()
105
 
        try:
106
 
            def a_function():
107
 
                pass
108
 
            a_function()
109
 
        finally:
110
 
            stats = profiler.stop()
111
 
        stats.freeze()
112
 
        lines = [str(data) for data in stats.data]
113
 
        lines = [line for line in lines if 'a_function' in line]
114
 
        self.assertLength(1, lines)
115
 
 
116
 
    def test_block_0(self):
117
 
        # When profiler_block is 0, reentrant profile requests fail.
118
 
        self.overrideAttr(bzrlib.lsprof.BzrProfiler, 'profiler_block', 0)
119
 
        inner_calls = []
120
 
        def inner():
121
 
            profiler = bzrlib.lsprof.BzrProfiler()
122
 
            self.assertRaises(errors.BzrError, profiler.start)
123
 
            inner_calls.append(True)
124
 
        bzrlib.lsprof.profile(inner)
125
 
        self.assertLength(1, inner_calls)
126
 
 
127
 
    def test_block_1(self):
128
 
        # When profiler_block is 1, concurrent profiles serialise.
129
 
        # This is tested by manually acquiring the profiler lock, then
130
 
        # starting a thread that tries to profile, and releasing the lock. 
131
 
        # We know due to test_block_0 that two profiles at once hit the lock,
132
 
        # so while this isn't perfect (we'd want a callback on the lock being
133
 
        # entered to allow lockstep evaluation of the actions), its good enough
134
 
        # to be confident regressions would be caught. Alternatively, if this
135
 
        # is flakey, a fake Lock object can be used to trace the calls made.
136
 
        calls = []
137
 
        def profiled():
138
 
            calls.append('profiled')
139
 
        def do_profile():
140
 
            bzrlib.lsprof.profile(profiled)
141
 
            calls.append('after_profiled')
142
 
        thread = threading.Thread(target=do_profile)
143
 
        bzrlib.lsprof.BzrProfiler.profiler_lock.acquire()
144
 
        try:
145
 
            try:
146
 
                thread.start()
147
 
            finally:
148
 
                bzrlib.lsprof.BzrProfiler.profiler_lock.release()
149
 
        finally:
150
 
            thread.join()
151
 
        self.assertLength(2, calls)