blob: 88130c481f146b35939795a8db4a42cf1b362010 [file] [log] [blame]
pytest-2.4.0: new fixture features/hooks and bug fixes
The just released pytest-2.4.0 brings many improvements and numerous
bug fixes while remaining plugin- and test-suite compatible apart
from a few supposedly very minor incompatibilities. See below for
a full list of details. A few feature highlights:
- new yield-style fixtures `pytest.yield_fixture
<>`_, allowing to use
existing with-style context managers in fixture functions.
- improved pdb support: ``import pdb ; pdb.set_trace()`` now works
without requiring prior disabling of stdout/stderr capturing.
Also the ``--pdb`` options works now on collection and internal errors
and we introduced a new experimental hook for IDEs/plugins to
intercept debugging: ``pytest_exception_interact(node, call, report)``.
- shorter monkeypatch variant to allow specifying an import path as
a target, for example: ``monkeypatch.setattr("requests.get", myfunc)``
- better unittest/nose compatibility: all teardown methods are now only
called if the corresponding setup method succeeded.
- integrate tab-completion on command line options if you
have `argcomplete <>`_
- allow boolean expression directly with skipif/xfail
if a "reason" is also specified.
- a new hook ``pytest_load_initial_conftests`` allows plugins like
`pytest-django <>`_ to
influence the environment before conftest files import ``django``.
- reporting: color the last line red or green depending if
failures/errors occurred or everything passed.
The documentation has been updated to accomodate the changes,
see ` <>`_
To install or upgrade pytest::
pip install -U pytest # or
easy_install -U pytest
**Many thanks to all who helped, including Floris Bruynooghe,
Brianna Laugher, Andreas Pelme, Anthon van der Neut, Anatoly Bubenkoff,
Vladimir Keleshev, Mathieu Agopian, Ronny Pfannschmidt, Christian
Theunert and many others.**
may passing tests be with you,
holger krekel
Changes between 2.3.5 and 2.4
known incompatibilities:
- if calling --genscript from python2.7 or above, you only get a
standalone script which works on python2.7 or above. Use Python2.6
to also get a python2.5 compatible version.
- all xunit-style teardown methods (nose-style, pytest-style,
unittest-style) will not be called if the corresponding setup method failed,
see issue322 below.
- the pytest_plugin_unregister hook wasn't ever properly called
and there is no known implementation of the hook - so it got removed.
- pytest.fixture-decorated functions cannot be generators (i.e. use
yield) anymore. This change might be reversed in 2.4.1 if it causes
unforeseen real-life issues. However, you can always write and return
an inner function/generator and change the fixture consumer to iterate
over the returned generator. This change was done in lieu of the new
``pytest.yield_fixture`` decorator, see below.
new features:
- experimentally introduce a new ``pytest.yield_fixture`` decorator
which accepts exactly the same parameters as pytest.fixture but
mandates a ``yield`` statement instead of a ``return statement`` from
fixture functions. This allows direct integration with "with-style"
context managers in fixture functions and generally avoids registering
of finalization callbacks in favour of treating the "after-yield" as
teardown code. Thanks Andreas Pelme, Vladimir Keleshev, Floris
Bruynooghe, Ronny Pfannschmidt and many others for discussions.
- allow boolean expression directly with skipif/xfail
if a "reason" is also specified. Rework skipping documentation
to recommend "condition as booleans" because it prevents surprises
when importing markers between modules. Specifying conditions
as strings will remain fully supported.
- reporting: color the last line red or green depending if
failures/errors occurred or everything passed. thanks Christian
- make "import pdb ; pdb.set_trace()" work natively wrt capturing (no
"-s" needed anymore), making ``pytest.set_trace()`` a mere shortcut.
- fix issue181: --pdb now also works on collect errors (and
on internal errors) . This was implemented by a slight internal
refactoring and the introduction of a new hook
``pytest_exception_interact`` hook (see next item).
- fix issue341: introduce new experimental hook for IDEs/terminals to
intercept debugging: ``pytest_exception_interact(node, call, report)``.
- new monkeypatch.setattr() variant to provide a shorter
invocation for patching out classes/functions from modules:
monkeypatch.setattr("requests.get", myfunc)
will replace the "get" function of the "requests" module with ``myfunc``.
- fix issue322: tearDownClass is not run if setUpClass failed. Thanks
Mathieu Agopian for the initial fix. Also make all of pytest/nose
finalizer mimick the same generic behaviour: if a setupX exists and
fails, don't run teardownX. This internally introduces a new method
"node.addfinalizer()" helper which can only be called during the setup
phase of a node.
- simplify pytest.mark.parametrize() signature: allow to pass a
CSV-separated string to specify argnames. For example:
``pytest.mark.parametrize("input,expected", [(1,2), (2,3)])``
works as well as the previous:
``pytest.mark.parametrize(("input", "expected"), ...)``.
- add support for setUpModule/tearDownModule detection, thanks Brian Okken.
- integrate tab-completion on options through use of "argcomplete".
Thanks Anthon van der Neut for the PR.
- change option names to be hyphen-separated long options but keep the
old spelling backward compatible. py.test -h will only show the
hyphenated version, for example "--collect-only" but "--collectonly"
will remain valid as well (for backward-compat reasons). Many thanks to
Anthon van der Neut for the implementation and to Hynek Schlawack for
pushing us.
- fix issue 308 - allow to mark/xfail/skip individual parameter sets
when parametrizing. Thanks Brianna Laugher.
- call new experimental pytest_load_initial_conftests hook to allow
3rd party plugins to do something before a conftest is loaded.
Bug fixes:
- fix issue358 - capturing options are now parsed more properly
by using a new parser.parse_known_args method.
- pytest now uses argparse instead of optparse (thanks Anthon) which
means that "argparse" is added as a dependency if installing into python2.6
environments or below.
- fix issue333: fix a case of bad unittest/pytest hook interaction.
- PR27: correctly handle nose.SkipTest during collection. Thanks
Antonio Cuni, Ronny Pfannschmidt.
- fix issue355: junitxml puts name="pytest" attribute to testsuite tag.
- fix issue336: autouse fixture in plugins should work again.
- fix issue279: improve object comparisons on assertion failure
for standard datatypes and recognise Thanks to
Brianna Laugher and Mathieu Agopian.
- fix issue317: assertion rewriter support for the is_package method
- fix issue335: document py.code.ExceptionInfo() object returned
from pytest.raises(), thanks Mathieu Agopian.
- remove implicit distribute_setup support from
- fix issue305: ignore any problems when writing pyc files.
- SO-17664702: call fixture finalizers even if the fixture function
partially failed (finalizers would not always be called before)
- fix issue320 - fix class scope for fixtures when mixed with
module-level functions. Thanks Anatloy Bubenkoff.
- you can specify "-q" or "-qq" to get different levels of "quieter"
reporting (thanks Katarzyna Jachim)
- fix issue300 - Fix order of conftest loading when starting py.test
in a subdirectory.
- fix issue323 - sorting of many module-scoped arg parametrizations
- make sessionfinish hooks execute with the same cwd-context as at
session start (helps fix plugin behaviour which write output files
with relative path such as pytest-cov)
- fix issue316 - properly reference collection hooks in docs
- fix issue 306 - cleanup of -k/-m options to only match markers/test
names/keywords respectively. Thanks Wouter van Ackooy.
- improved doctest counting for doctests in python modules --
files without any doctest items will not show up anymore
and doctest examples are counted as separate test items.
thanks Danilo Bellini.
- fix issue245 by depending on the released py-1.4.14
which fixes to work with files with no
mode. Thanks Jason R. Coombs.
- fix junitxml generation when test output contains control characters,
addressing issue267, thanks Jaap Broekhuizen
- fix issue338: honor --tb style for setup/teardown errors as well. Thanks Maho.
- fix issue307 - use yaml.safe_load in example, thanks Mark Eichin.
- better parametrize error messages, thanks Brianna Laugher
- pytest_terminal_summary(terminalreporter) hooks can now use
".section(title)" and ".line(msg)" methods to print extra
information at the end of a test run.