156 lines
4.9 KiB
Plaintext
156 lines
4.9 KiB
Plaintext
Changing standard (Python) test discovery
|
|
===============================================
|
|
|
|
Changing directory recursion
|
|
-----------------------------------------------------
|
|
|
|
You can set the :confval:`norecursedirs` option in an ini-file, for example your ``setup.cfg`` in the project root directory::
|
|
|
|
# content of setup.cfg
|
|
[pytest]
|
|
norecursedirs = .svn _build tmp*
|
|
|
|
This would tell ``pytest`` to not recurse into typical subversion or sphinx-build directories or into any ``tmp`` prefixed directory.
|
|
|
|
.. _`change naming conventions`:
|
|
|
|
Changing naming conventions
|
|
-----------------------------------------------------
|
|
|
|
You can configure different naming conventions by setting
|
|
the :confval:`python_files`, :confval:`python_classes` and
|
|
:confval:`python_functions` configuration options. Example::
|
|
|
|
# content of setup.cfg
|
|
# can also be defined in in tox.ini or pytest.ini file
|
|
[pytest]
|
|
python_files=check_*.py
|
|
python_classes=Check
|
|
python_functions=*_check
|
|
|
|
This would make ``pytest`` look for tests in files that match the ``check_*
|
|
.py`` glob-pattern, ``Check`` prefixes in classes, and functions and methods
|
|
that match ``*_check``. For example, if we have::
|
|
|
|
# content of check_myapp.py
|
|
class CheckMyApp:
|
|
def simple_check(self):
|
|
pass
|
|
def complex_check(self):
|
|
pass
|
|
|
|
then the test collection looks like this::
|
|
|
|
$ py.test --collect-only
|
|
======= test session starts ========
|
|
platform linux2 -- Python 2.7.9, pytest-2.8.0.dev4, py-1.4.28, pluggy-0.3.0
|
|
rootdir: $REGENDOC_TMPDIR, inifile: setup.cfg
|
|
collected 2 items
|
|
<Module 'check_myapp.py'>
|
|
<Class 'CheckMyApp'>
|
|
<Instance '()'>
|
|
<Function 'simple_check'>
|
|
<Function 'complex_check'>
|
|
|
|
======= in 0.12 seconds ========
|
|
|
|
.. note::
|
|
|
|
the ``python_functions`` and ``python_classes`` options has no effect
|
|
for ``unittest.TestCase`` test discovery because pytest delegates
|
|
detection of test case methods to unittest code.
|
|
|
|
Interpreting cmdline arguments as Python packages
|
|
-----------------------------------------------------
|
|
|
|
You can use the ``--pyargs`` option to make ``pytest`` try
|
|
interpreting arguments as python package names, deriving
|
|
their file system path and then running the test. For
|
|
example if you have unittest2 installed you can type::
|
|
|
|
py.test --pyargs unittest2.test.test_skipping -q
|
|
|
|
which would run the respective test module. Like with
|
|
other options, through an ini-file and the :confval:`addopts` option you
|
|
can make this change more permanently::
|
|
|
|
# content of pytest.ini
|
|
[pytest]
|
|
addopts = --pyargs
|
|
|
|
Now a simple invocation of ``py.test NAME`` will check
|
|
if NAME exists as an importable package/module and otherwise
|
|
treat it as a filesystem path.
|
|
|
|
Finding out what is collected
|
|
-----------------------------------------------
|
|
|
|
You can always peek at the collection tree without running tests like this::
|
|
|
|
. $ py.test --collect-only pythoncollection.py
|
|
======= test session starts ========
|
|
platform linux2 -- Python 2.7.9, pytest-2.8.0.dev4, py-1.4.28, pluggy-0.3.0
|
|
rootdir: $PWD/doc/en, inifile: pytest.ini
|
|
collected 3 items
|
|
<Module 'example/pythoncollection.py'>
|
|
<Function 'test_function'>
|
|
<Class 'TestClass'>
|
|
<Instance '()'>
|
|
<Function 'test_method'>
|
|
<Function 'test_anothermethod'>
|
|
|
|
======= in 0.12 seconds ========
|
|
|
|
customizing test collection to find all .py files
|
|
---------------------------------------------------------
|
|
|
|
.. regendoc:wipe
|
|
|
|
You can easily instruct ``pytest`` to discover tests from every python file::
|
|
|
|
|
|
# content of pytest.ini
|
|
[pytest]
|
|
python_files = *.py
|
|
|
|
However, many projects will have a ``setup.py`` which they don't want to be imported. Moreover, there may files only importable by a specific python version.
|
|
For such cases you can dynamically define files to be ignored by listing
|
|
them in a ``conftest.py`` file::
|
|
|
|
# content of conftest.py
|
|
import sys
|
|
|
|
collect_ignore = ["setup.py"]
|
|
if sys.version_info[0] > 2:
|
|
collect_ignore.append("pkg/module_py2.py")
|
|
|
|
And then if you have a module file like this::
|
|
|
|
# content of pkg/module_py2.py
|
|
def test_only_on_python2():
|
|
try:
|
|
assert 0
|
|
except Exception, e:
|
|
pass
|
|
|
|
and a setup.py dummy file like this::
|
|
|
|
# content of setup.py
|
|
0/0 # will raise exeption if imported
|
|
|
|
then a pytest run on python2 will find the one test when run with a python2
|
|
interpreters and will leave out the setup.py file::
|
|
|
|
$ py.test --collect-only
|
|
======= test session starts ========
|
|
platform linux2 -- Python 2.7.9, pytest-2.8.0.dev4, py-1.4.28, pluggy-0.3.0
|
|
rootdir: $REGENDOC_TMPDIR, inifile: pytest.ini
|
|
collected 1 items
|
|
<Module 'pkg/module_py2.py'>
|
|
<Function 'test_only_on_python2'>
|
|
|
|
======= in 0.12 seconds ========
|
|
|
|
If you run with a Python3 interpreter the moduled added through the conftest.py file will not be considered for test collection.
|
|
|