106 lines
2.7 KiB
ReStructuredText
106 lines
2.7 KiB
ReStructuredText
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Doctest integration for modules and test files
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=========================================================
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By default all files matching the ``test*.txt`` pattern will
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be run through the python standard ``doctest`` module. You
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can change the pattern by issuing::
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py.test --doctest-glob='*.rst'
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on the command line. Since version ``2.9``, ``--doctest-glob``
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can be given multiple times in the command-line.
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You can also trigger running of doctests
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from docstrings in all python modules (including regular
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python test modules)::
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py.test --doctest-modules
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You can make these changes permanent in your project by
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putting them into a pytest.ini file like this:
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.. code-block:: ini
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# content of pytest.ini
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[pytest]
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addopts = --doctest-modules
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If you then have a text file like this::
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# content of example.rst
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hello this is a doctest
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>>> x = 3
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>>> x
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3
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and another like this::
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# content of mymodule.py
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def something():
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""" a doctest in a docstring
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>>> something()
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42
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"""
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return 42
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then you can just invoke ``py.test`` without command line options::
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$ py.test
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======= test session starts ========
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platform linux -- Python 3.4.0, pytest-2.9.1, py-1.4.31, pluggy-0.3.1
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rootdir: $REGENDOC_TMPDIR, inifile: pytest.ini
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collected 1 items
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mymodule.py .
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======= 1 passed in 0.12 seconds ========
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It is possible to use fixtures using the ``getfixture`` helper::
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# content of example.rst
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>>> tmp = getfixture('tmpdir')
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>>> ...
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>>>
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Also, :ref:`usefixtures` and :ref:`autouse` fixtures are supported
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when executing text doctest files.
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The standard ``doctest`` module provides some setting flags to configure the
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strictness of doctest tests. In py.test You can enable those flags those flags
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using the configuration file. To make pytest ignore trailing whitespaces and
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ignore lengthy exception stack traces you can just write:
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.. code-block:: ini
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[pytest]
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doctest_optionflags= NORMALIZE_WHITESPACE IGNORE_EXCEPTION_DETAIL
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py.test also introduces new options to allow doctests to run in Python 2 and
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Python 3 unchanged:
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* ``ALLOW_UNICODE``: when enabled, the ``u`` prefix is stripped from unicode
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strings in expected doctest output.
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* ``ALLOW_BYTES``: when enabled, the ``b`` prefix is stripped from byte strings
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in expected doctest output.
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As with any other option flag, these flags can be enabled in ``pytest.ini`` using
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the ``doctest_optionflags`` ini option:
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.. code-block:: ini
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[pytest]
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doctest_optionflags = ALLOW_UNICODE ALLOW_BYTES
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Alternatively, it can be enabled by an inline comment in the doc test
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itself::
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# content of example.rst
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>>> get_unicode_greeting() # doctest: +ALLOW_UNICODE
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'Hello'
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