pytest-profiling 1.2.2

# Pytest Profiling Plugin

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

Tests are profiled with [cProfile](http://docs.python.org/library/profile.html#module-cProfile) and analysed with [pstats](http://docs.python.org/library/profile.html#pstats.Stats); heat graphs are
generated using [gprof2dot](http://code.google.com/p/jrfonseca/wiki/Gprof2Dot) and [dot](http://www.graphviz.org/).



## Installation

Install using your favourite package installer:
```bash
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):

```python
pytest_plugins = ['pytest_profiling']
```

## Usage

Once installed, the plugin provides extra options to pytest:

```bash
$ 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:


```bash
$ 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:

```bash
$ 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:

```bash
$ 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:

```bash
$ 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

### 1.2.2 (2016-10-2r70)
* 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