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Profiling plugin for py.test

Project description

Profiling plugin for pytest, with tabular and heat graph output.

Tests are profiled with cProfile and analysed with pstats; heat graphs are generated using gprof2dot and dot.

Installation

Install using your favourite package installer:

pip install pytest-profiling
# or
easy_install pytest-profiling

Enable the fixture explicitly in your tests or conftest.py (not required when using setuptools entry points):

pytest_plugins = ['pytest_profiling']

Usage

Once installed, the plugin provides extra options to pytest:

$ py.test --help
...
  Profiling:
    --profile           generate profiling information
    --profile-svg       generate profiling graph (using gprof2dot and dot
                        -Tsvg)

The --profile and profile-svg options can be combined with any other option:

$ py.test tests/unit/test_logging.py --profile
============================= test session starts ==============================
platform linux2 -- Python 2.6.2 -- pytest-2.2.3
collected 3 items

tests/unit/test_logging.py ...
Profiling (from prof/combined.prof):
Fri Oct 26 11:05:00 2012    prof/combined.prof

         289 function calls (278 primitive calls) in 0.001 CPU seconds

   Ordered by: cumulative time
   List reduced from 61 to 20 due to restriction <20>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        3    0.000    0.000    0.001    0.000 <string>:1(<module>)
      6/3    0.000    0.000    0.001    0.000 core.py:344(execute)
        3    0.000    0.000    0.001    0.000 python.py:63(pytest_pyfunc_call)
        1    0.000    0.000    0.001    0.001 test_logging.py:34(test_flushing)
        1    0.000    0.000    0.000    0.000 _startup.py:23(_flush)
        2    0.000    0.000    0.000    0.000 mock.py:979(__call__)
        2    0.000    0.000    0.000    0.000 mock.py:986(_mock_call)
        4    0.000    0.000    0.000    0.000 mock.py:923(_get_child_mock)
        6    0.000    0.000    0.000    0.000 mock.py:512(__new__)
        2    0.000    0.000    0.000    0.000 mock.py:601(__get_return_value)
        4    0.000    0.000    0.000    0.000 mock.py:695(__getattr__)
        6    0.000    0.000    0.000    0.000 mock.py:961(__init__)
    22/14    0.000    0.000    0.000    0.000 mock.py:794(__setattr__)
        6    0.000    0.000    0.000    0.000 core.py:356(getkwargs)
        6    0.000    0.000    0.000    0.000 mock.py:521(__init__)
        3    0.000    0.000    0.000    0.000 skipping.py:122(pytest_pyfunc_call)
        6    0.000    0.000    0.000    0.000 core.py:366(varnames)
        3    0.000    0.000    0.000    0.000 skipping.py:125(check_xfail_no_run)
        2    0.000    0.000    0.000    0.000 mock.py:866(assert_called_once_with)
        6    0.000    0.000    0.000    0.000 mock.py:645(__set_side_effect)


=========================== 3 passed in 0.13 seconds ===========================

pstats files (one per test item) are retained for later analysis in prof directory, along with a combined.prof file:

$ ls -1 prof/
combined.prof
test_app.prof
test_flushing.prof
test_import.prof

By default the pstats files are named after their corresponding test name, with illegal filesystem characters replaced by underscores. If the full path is longer that operating system allows then it will be renamed to first 4 bytes of an md5 hash of the test name:

$ ls -1 prof/
combined.prof
test_not_longer_than_max_allowed.prof
68b329da.prof

If the --profile-svg option is given, along with the prof files and tabular output a svg file will be generated:

$ py.test tests/unit/test_logging.py --profile-svg
...
SVG profile in prof/combined.svg.

This is best viewed with a good svg viewer e.g. Chrome.

Changelog

1.3.0 (2017-11-17)

  • Fixed workspace deletion when teardown is None
  • Fixed squash of root logger in pytest-listener
  • Added S3 Minio fixture (many thanks to Gavin Bisesi)
  • Added Postgres fixture (many thanks to Gavin Bisesi)
  • Use requests for server fixtures http gets as it handles redirects and proxies properly

1.2.12 (2017-8-1)

  • Fixed regression on cacheing ephemeral hostname, some clients were relying on this. This is now optional.

1.2.11 (2017-7-21)

  • Fix for OSX binding to illegal local IP range (Thanks to Gavin Bisesi)
  • Setup and Py3k fixes for pytest-profiling (Thanks to xoviat)
  • We no longer try and bind port 5000 when reserving a local IP host, as someone could have bound it to 0.0.0.0
  • Fix for #46 sourcing gprof2dot when the local venv has not been activated

1.2.10 (2017-2-23)

  • Handle custom Pytest test items in pytest-webdriver

1.2.9 (2017-2-23)

  • Add username into mongo server fixture tempdir path to stop collisions on shared multiuser filesystems

1.2.8 (2017-2-21)

  • Return function results in shutil.run.run_as_main

1.2.7 (2017-2-20)

  • More handling for older versions of path.py
  • Allow virtualenv argument passing in pytest-virtualenv

1.2.6 (2017-2-16 )

  • Updated devpi server server setup for devpi-server >= 2.0
  • Improvements for random port picking
  • HTTPD server now binds to 0.0.0.0 by default to aid Selenium-style testing
  • Updated mongodb server args for mongodb >= 3.2
  • Corrections for mongodb fixture config and improve startup logic
  • Added module-scoped mongodb fixture
  • Handling for older versions of path.py
  • Fix for #40 where tests that chdir break pytest-profiling

1.2.5 (2016-12-09)

  • Improvements for server runner host and port generation, now supports random local IPs
  • Bugfix for RethinkDB fixture config

1.2.4 (2016-11-14)

  • Bugfix for pymongo extra dependency
  • Windows compatibility fix for pytest-virtualenv (Thanks to Jean-Christophe Fillion-Robin for PR)
  • Fix symlink handling for pytest-shutil.cmdline.get_real_python_executable

1.2.3 (2016-11-7)

  • Improve resiliency of Mongo fixture startup checks

1.2.2 (2016-10-27)

  • Python 3 compatibility across most of the modules
  • Fixed deprecated Path.py imports (Thanks to Bryan Moscon)
  • Fixed deprecated multicall in pytest-profiling (Thanks to Paul van der Linden for PR)
  • Added devpi-server fixture to create an index per test function
  • Added missing licence file
  • Split up httpd server fixture config so child classes can override loaded modules easier
  • Added ‘preserve_sys_path’ argument to TestServer base class which exports the current python sys.path to subprocesses.
  • Updated httpd, redis and jenkins runtime args and paths to current Ubuntu spec
  • Ignore errors when tearing down workspaces to avoid race conditions in ‘shutil.rmtree’ implementation

1.2.1 (2016-3-1)

  • Fixed pytest-verbose-parametrize for latest version of py.test

1.2.0 (2016-2-19)

  • New plugin: git repository fixture

1.1.1 (2016-2-16)

  • pytest-profiling improvement: escape illegal characters in .prof files (Thanks to Aarni Koskela for the PR)

1.1.0 (2016-2-15)

  • New plugin: devpi server fixture
  • pytest-profiling improvement: overly-long .prof files are saved as the short hash of the test name (Thanks to Vladimir Lagunov for PR)
  • Changed default behavior of workspace.run() to not use a subshell for security reasons
  • Corrected virtualenv.run() method to handle arguments the same as the parent method workspace.run()
  • Removed deprecated ‘–distribute’ from virtualenv args

1.0.1 (2015-12-23)

  • Packaging bugfix

1.0.0 (2015-12-21)

  • Initial public release

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