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authorJannis Leidel <jannis@leidel.info>2011-05-27 10:49:47 +0000
committerJannis Leidel <jannis@leidel.info>2011-05-27 10:49:47 +0000
commit407f62fd31689b6158902d3ffdcde64aa27679a7 (patch)
tree3d7b05bf64e764ba7a67df59f5ec49fdf17787d0 /docs/internals/contributing/writing-code
parent69cfee2f167f64c15de6bfcd6b9779534132db2f (diff)
Fixed #15796 -- Restructured the contributing documentation and added note about newly added Trac abilities. Many thanks to Julien Phalip.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16284 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Diffstat (limited to 'docs/internals/contributing/writing-code')
-rw-r--r--docs/internals/contributing/writing-code/branch-policy.txt180
-rw-r--r--docs/internals/contributing/writing-code/coding-style.txt190
-rw-r--r--docs/internals/contributing/writing-code/index.txt15
-rw-r--r--docs/internals/contributing/writing-code/submitting-patches.txt160
-rw-r--r--docs/internals/contributing/writing-code/unit-tests.txt167
5 files changed, 712 insertions, 0 deletions
diff --git a/docs/internals/contributing/writing-code/branch-policy.txt b/docs/internals/contributing/writing-code/branch-policy.txt
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index 0000000000..08dfe8bc76
--- /dev/null
+++ b/docs/internals/contributing/writing-code/branch-policy.txt
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+=============
+Branch policy
+=============
+
+In general, the trunk must be kept stable. People should be able to run
+production sites against the trunk at any time. Additionally, commits to trunk
+ought to be as atomic as possible -- smaller changes are better. Thus, large
+feature changes -- that is, changes too large to be encapsulated in a single
+patch, or changes that need multiple eyes on them -- must happen on dedicated
+branches.
+
+This means that if you want to work on a large feature -- anything that would
+take more than a single patch, or requires large-scale refactoring -- you need
+to do it on a feature branch. Our development process recognizes two options
+for feature branches:
+
+ 1. Feature branches using a distributed revision control system like
+ Git_, Mercurial_, Bazaar_, etc.
+
+ If you're familiar with one of these tools, this is probably your best
+ option since it doesn't require any support or buy-in from the Django
+ core developers.
+
+ However, do keep in mind that Django will continue to use Subversion
+ for the foreseeable future, and this will naturally limit the
+ recognition of your branch. Further, if your branch becomes eligible
+ for merging to trunk you'll need to find a core developer familiar
+ with your DVCS of choice who'll actually perform the merge.
+
+ If you do decided to start a distributed branch of Django and choose to
+ make it public, please add the branch to the `Django branches`_ wiki
+ page.
+
+ 2. Feature branches using SVN have a higher bar. If you want a branch
+ in SVN itself, you'll need a "mentor" among the :doc:`core committers
+ </internals/committers>`. This person is responsible for actually
+ creating the branch, monitoring your process (see below), and
+ ultimately merging the branch into trunk.
+
+ If you want a feature branch in SVN, you'll need to ask in
+ `django-developers`_ for a mentor.
+
+.. _git: http://git-scm.com/
+.. _mercurial: http://mercurial.selenic.com/
+.. _bazaar: http://bazaar.canonical.com/
+.. _django branches: http://code.djangoproject.com/wiki/DjangoBranches
+
+Branch rules
+------------
+
+We've got a few rules for branches born out of experience with what makes a
+successful Django branch.
+
+DVCS branches are obviously not under central control, so we have no way of
+enforcing these rules. However, if you're using a DVCS, following these rules
+will give you the best chance of having a successful branch (read: merged back
+to trunk).
+
+Developers with branches in SVN, however, **must** follow these rules. The
+branch mentor will keep on eye on the branch and **will delete it** if these
+rules are broken.
+
+ * Only branch entire copies of the Django tree, even if work is only
+ happening on part of that tree. This makes it painless to switch to a
+ branch.
+
+ * Merge changes from trunk no less than once a week, and preferably every
+ couple-three days.
+
+ In our experience, doing regular trunk merges is often the difference
+ between a successful branch and one that fizzles and dies.
+
+ If you're working on an SVN branch, you should be using `svnmerge.py`_
+ to track merges from trunk.
+
+ * Keep tests passing and documentation up-to-date. As with patches,
+ we'll only merge a branch that comes with tests and documentation.
+
+.. _svnmerge.py: http://www.orcaware.com/svn/wiki/Svnmerge.py
+
+Once the branch is stable and ready to be merged into the trunk, alert
+`django-developers`_.
+
+After a branch has been merged, it should be considered "dead"; write access
+to it will be disabled, and old branches will be periodically "trimmed."
+To keep our SVN wrangling to a minimum, we won't be merging from a given
+branch into the trunk more than once.
+
+Using branches
+--------------
+
+To use a branch, you'll need to do two things:
+
+ * Get the branch's code through Subversion.
+
+ * Point your Python ``site-packages`` directory at the branch's version of
+ the ``django`` package rather than the version you already have
+ installed.
+
+Getting the code from Subversion
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+To get the latest version of a branch's code, check it out using Subversion:
+
+.. code-block:: bash
+
+ svn co http://code.djangoproject.com/svn/django/branches/<branch>/
+
+...where ``<branch>`` is the branch's name. See the `list of branch names`_.
+
+Alternatively, you can automatically convert an existing directory of the
+Django source code as long as you've checked it out via Subversion. To do the
+conversion, execute this command from within your ``django`` directory:
+
+.. code-block:: bash
+
+ svn switch http://code.djangoproject.com/svn/django/branches/<branch>/
+
+The advantage of using ``svn switch`` instead of ``svn co`` is that the
+``switch`` command retains any changes you might have made to your local copy
+of the code. It attempts to merge those changes into the "switched" code. The
+disadvantage is that it may cause conflicts with your local changes if the
+"switched" code has altered the same lines of code.
+
+(Note that if you use ``svn switch``, you don't need to point Python at the
+new version, as explained in the next section.)
+
+.. _list of branch names: http://code.djangoproject.com/browser/django/branches
+
+.. _pointing-python-at-the-new-django-version:
+
+Pointing Python at the new Django version
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Once you've retrieved the branch's code, you'll need to change your Python
+``site-packages`` directory so that it points to the branch version of the
+``django`` directory. (The ``site-packages`` directory is somewhere such as
+``/usr/lib/python2.4/site-packages`` or
+``/usr/local/lib/python2.4/site-packages`` or ``C:\Python\site-packages``.)
+
+The simplest way to do this is by renaming the old ``django`` directory to
+``django.OLD`` and moving the trunk version of the code into the directory
+and calling it ``django``.
+
+Alternatively, you can use a symlink called ``django`` that points to the
+location of the branch's ``django`` package. If you want to switch back, just
+change the symlink to point to the old code.
+
+A third option is to use a `path file`_ (``<something>.pth``) which should
+work on all systems (including Windows, which doesn't have symlinks
+available). First, make sure there are no files, directories or symlinks named
+``django`` in your ``site-packages`` directory. Then create a text file named
+``django.pth`` and save it to your ``site-packages`` directory. That file
+should contain a path to your copy of Django on a single line and optional
+comments. Here is an example that points to multiple branches. Just uncomment
+the line for the branch you want to use ('Trunk' in this example) and make
+sure all other lines are commented::
+
+ # Trunk is a svn checkout of:
+ # http://code.djangoproject.com/svn/django/trunk/
+ #
+ /path/to/trunk
+
+ # <branch> is a svn checkout of:
+ # http://code.djangoproject.com/svn/django/branches/<branch>/
+ #
+ #/path/to/<branch>
+
+ # On windows a path may look like this:
+ # C:/path/to/<branch>
+
+If you're using Django 0.95 or earlier and installed it using
+``python setup.py install``, you'll have a directory called something like
+``Django-0.95-py2.4.egg`` instead of ``django``. In this case, edit the file
+``setuptools.pth`` and remove the line that references the Django ``.egg``
+file. Then copy the branch's version of the ``django`` directory into
+``site-packages``.
+
+.. _path file: http://docs.python.org/library/site.html
+.. _django-developers: http://groups.google.com/group/django-developers
diff --git a/docs/internals/contributing/writing-code/coding-style.txt b/docs/internals/contributing/writing-code/coding-style.txt
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--- /dev/null
+++ b/docs/internals/contributing/writing-code/coding-style.txt
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+============
+Coding Style
+============
+
+Please follow these coding standards when writing code for inclusion in Django.
+
+Python style
+------------
+
+ * Unless otherwise specified, follow :pep:`8`.
+
+ You could use a tool like `pep8.py`_ to check for some problems in this
+ area, but remember that PEP 8 is only a guide, so respect the style of
+ the surrounding code as a primary goal.
+
+ * Use four spaces for indentation.
+
+ * Use underscores, not camelCase, for variable, function and method names
+ (i.e. ``poll.get_unique_voters()``, not ``poll.getUniqueVoters``).
+
+ * Use ``InitialCaps`` for class names (or for factory functions that
+ return classes).
+
+ * In docstrings, use "action words" such as::
+
+ def foo():
+ """
+ Calculates something and returns the result.
+ """
+ pass
+
+ Here's an example of what not to do::
+
+ def foo():
+ """
+ Calculate something and return the result.
+ """
+ pass
+
+Template style
+--------------
+
+ * In Django template code, put one (and only one) space between the curly
+ brackets and the tag contents.
+
+ Do this:
+
+ .. code-block:: html+django
+
+ {{ foo }}
+
+ Don't do this:
+
+ .. code-block:: html+django
+
+ {{foo}}
+
+View style
+----------
+
+ * In Django views, the first parameter in a view function should be called
+ ``request``.
+
+ Do this::
+
+ def my_view(request, foo):
+ # ...
+
+ Don't do this::
+
+ def my_view(req, foo):
+ # ...
+
+Model style
+-----------
+
+ * Field names should be all lowercase, using underscores instead of
+ camelCase.
+
+ Do this::
+
+ class Person(models.Model):
+ first_name = models.CharField(max_length=20)
+ last_name = models.CharField(max_length=40)
+
+ Don't do this::
+
+ class Person(models.Model):
+ FirstName = models.CharField(max_length=20)
+ Last_Name = models.CharField(max_length=40)
+
+ * The ``class Meta`` should appear *after* the fields are defined, with
+ a single blank line separating the fields and the class definition.
+
+ Do this::
+
+ class Person(models.Model):
+ first_name = models.CharField(max_length=20)
+ last_name = models.CharField(max_length=40)
+
+ class Meta:
+ verbose_name_plural = 'people'
+
+ Don't do this::
+
+ class Person(models.Model):
+ first_name = models.CharField(max_length=20)
+ last_name = models.CharField(max_length=40)
+ class Meta:
+ verbose_name_plural = 'people'
+
+ Don't do this, either::
+
+ class Person(models.Model):
+ class Meta:
+ verbose_name_plural = 'people'
+
+ first_name = models.CharField(max_length=20)
+ last_name = models.CharField(max_length=40)
+
+ * The order of model inner classes and standard methods should be as
+ follows (noting that these are not all required):
+
+ * All database fields
+ * Custom manager attributes
+ * ``class Meta``
+ * ``def __unicode__()``
+ * ``def __str__()``
+ * ``def save()``
+ * ``def get_absolute_url()``
+ * Any custom methods
+
+ * If ``choices`` is defined for a given model field, define the choices as
+ a tuple of tuples, with an all-uppercase name, either near the top of
+ the model module or just above the model class. Example::
+
+ GENDER_CHOICES = (
+ ('M', 'Male'),
+ ('F', 'Female'),
+ )
+
+Use of ``django.conf.settings``
+-------------------------------
+
+Modules should not in general use settings stored in ``django.conf.settings``
+at the top level (i.e. evaluated when the module is imported). The explanation
+for this is as follows:
+
+Manual configuration of settings (i.e. not relying on the
+``DJANGO_SETTINGS_MODULE`` environment variable) is allowed and possible as
+follows::
+
+ from django.conf import settings
+
+ settings.configure({}, SOME_SETTING='foo')
+
+However, if any setting is accessed before the ``settings.configure`` line,
+this will not work. (Internally, ``settings`` is a ``LazyObject`` which
+configures itself automatically when the settings are accessed if it has not
+already been configured).
+
+So, if there is a module containing some code as follows::
+
+ from django.conf import settings
+ from django.core.urlresolvers import get_callable
+
+ default_foo_view = get_callable(settings.FOO_VIEW)
+
+...then importing this module will cause the settings object to be configured.
+That means that the ability for third parties to import the module at the top
+level is incompatible with the ability to configure the settings object
+manually, or makes it very difficult in some circumstances.
+
+Instead of the above code, a level of laziness or indirection must be used,
+such as `django.utils.functional.LazyObject``, ``django.utils.functional.lazy``
+or ``lambda``.
+
+Miscellaneous
+-------------
+
+ * Mark all strings for internationalization; see the :doc:`i18n
+ documentation </topics/i18n/index>` for details.
+
+ * Please don't put your name in the code you contribute. Our policy is to
+ keep contributors' names in the ``AUTHORS`` file distributed with Django
+ -- not scattered throughout the codebase itself. Feel free to include a
+ change to the ``AUTHORS`` file in your patch if you make more than a
+ single trivial change.
+
+.. _pep8.py: http://pypi.python.org/pypi/pep8/
diff --git a/docs/internals/contributing/writing-code/index.txt b/docs/internals/contributing/writing-code/index.txt
new file mode 100644
index 0000000000..bd9b2a346a
--- /dev/null
+++ b/docs/internals/contributing/writing-code/index.txt
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+============
+Writing code
+============
+
+So you'd like to write some code to improve Django. Awesome! Browse the
+following sections to find out how to give your code patches the best
+chances to be included in Django core:
+
+.. toctree::
+ :maxdepth: 1
+
+ coding-style
+ unit-tests
+ submitting-patches
+ branch-policy
diff --git a/docs/internals/contributing/writing-code/submitting-patches.txt b/docs/internals/contributing/writing-code/submitting-patches.txt
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+++ b/docs/internals/contributing/writing-code/submitting-patches.txt
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+==================
+Submitting patches
+==================
+
+We're always grateful for patches to Django's code. Indeed, bug reports
+with associated patches will get fixed *far* more quickly than those
+without patches.
+
+"Claiming" tickets
+------------------
+
+In an open-source project with hundreds of contributors around the world, it's
+important to manage communication efficiently so that work doesn't get
+duplicated and contributors can be as effective as possible. Hence, our policy
+is for contributors to "claim" tickets in order to let other developers know
+that a particular bug or feature is being worked on.
+
+If you have identified a contribution you want to make and you're capable of
+fixing it (as measured by your coding ability, knowledge of Django internals
+and time availability), claim it by following these steps:
+
+ * `Create an account`_ to use in our ticket system. If you have an account
+ but have forgotten your password, you can reset it using the
+ `password reset page`_.
+
+ * If a ticket for this issue doesn't exist yet, create one in our
+ `ticket tracker`_.
+
+ * If a ticket for this issue already exists, make sure nobody else has
+ claimed it. To do this, look at the "Assigned to" section of the ticket.
+ If it's assigned to "nobody," then it's available to be claimed.
+ Otherwise, somebody else is working on this ticket, and you either find
+ another bug/feature to work on, or contact the developer working on the
+ ticket to offer your help.
+
+ * Log into your account, if you haven't already, by clicking "Login" in
+ the upper right of the ticket page.
+
+ * Claim the ticket by clicking the radio button next to "Accept ticket"
+ near the bottom of the page, then clicking "Submit changes."
+
+.. _Create an account: https://www.djangoproject.com/accounts/register/
+.. _password reset page: https://www.djangoproject.com/accounts/password/reset/
+
+Ticket claimers' responsibility
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Once you've claimed a ticket, you have a responsibility to work on that ticket
+in a reasonably timely fashion. If you don't have time to work on it, either
+unclaim it or don't claim it in the first place!
+
+If there's no sign of progress on a particular claimed ticket for a week or
+two, another developer may ask you to relinquish the ticket claim so that it's
+no longer monopolized and somebody else can claim it.
+
+If you've claimed a ticket and it's taking a long time (days or weeks) to code,
+keep everybody updated by posting comments on the ticket. If you don't provide
+regular updates, and you don't respond to a request for a progress report,
+your claim on the ticket may be revoked. As always, more communication is
+better than less communication!
+
+Which tickets should be claimed?
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Of course, going through the steps of claiming tickets is overkill in some
+cases. In the case of small changes, such as typos in the documentation or
+small bugs that will only take a few minutes to fix, you don't need to jump
+through the hoops of claiming tickets. Just submit your patch and be done with
+it.
+
+.. _patch-style:
+
+Patch style
+-----------
+
+ * Make sure your code matches our :doc:`coding-style`.
+
+ * Submit patches in the format returned by the ``svn diff`` command.
+ An exception is for code changes that are described more clearly in
+ plain English than in code. Indentation is the most common example; it's
+ hard to read patches when the only difference in code is that it's
+ indented.
+
+ Patches in ``git diff`` format are also acceptable.
+
+ * When creating patches, always run ``svn diff`` from the top-level
+ ``trunk`` directory -- i.e., the one that contains ``django``, ``docs``,
+ ``tests``, ``AUTHORS``, etc. This makes it easy for other people to
+ apply your patches.
+
+ * Attach patches to a ticket in the `ticket tracker`_, using the "attach
+ file" button. Please *don't* put the patch in the ticket description
+ or comment unless it's a single line patch.
+
+ * Name the patch file with a ``.diff`` extension; this will let the ticket
+ tracker apply correct syntax highlighting, which is quite helpful.
+
+ * Check the "Has patch" box on the ticket details. This will make it
+ obvious that the ticket includes a patch, and it will add the ticket to
+ the `list of tickets with patches`_.
+
+ * The code required to fix a problem or add a feature is an essential part
+ of a patch, but it is not the only part. A good patch should also
+ include a regression test to validate the behavior that has been fixed
+ (and prevent the problem from arising again).
+
+ * If the code associated with a patch adds a new feature, or modifies
+ behavior of an existing feature, the patch should also contain
+ documentation.
+
+Non-trivial patches
+-------------------
+
+A "non-trivial" patch is one that is more than a simple bug fix. It's a patch
+that introduces Django functionality and makes some sort of design decision.
+
+If you provide a non-trivial patch, include evidence that alternatives have
+been discussed on `django-developers`_. If you're not sure whether your patch
+should be considered non-trivial, just ask.
+
+Javascript patches
+------------------
+
+.. versionadded:: 1.2
+
+Django's admin system leverages the jQuery framework to increase the
+capabilities of the admin interface. In conjunction, there is an emphasis on
+admin javascript performance and minimizing overall admin media file size.
+Serving compressed or "minified" versions of javascript files is considered
+best practice in this regard.
+
+To that end, patches for javascript files should include both the original
+code for future development (e.g. "foo.js"), and a compressed version for
+production use (e.g. "foo.min.js"). Any links to the file in the codebase
+should point to the compressed version.
+
+To simplify the process of providing optimized javascript code, Django
+includes a handy script which should be used to create a "minified" version.
+This script is located at ``/contrib/admin/media/js/compress.py``.
+
+Behind the scenes, ``compress.py`` is a front-end for Google's
+`Closure Compiler`_ which is written in Java. However, the Closure Compiler
+library is not bundled with Django directly, so those wishing to contribute
+complete javascript patches will need to download and install the library
+independently.
+
+The Closure Compiler library requires Java version 6 or higher (Java 1.6 or
+higher on Mac OS X). Note that Mac OS X 10.5 and earlier did not ship with
+Java 1.6 by default, so it may be necessary to upgrade your Java installation
+before the tool will be functional. Also note that even after upgrading Java,
+the default `/usr/bin/java` command may remain linked to the previous Java
+binary, so relinking that command may be necessary as well.
+
+Please don't forget to run ``compress.py`` and include the ``diff`` of the
+minified scripts when submitting patches for Django's javascript.
+
+.. _Closure Compiler: http://code.google.com/closure/compiler/
+.. _django-developers: http://groups.google.com/group/django-developers
+.. _list of tickets with patches: http://code.djangoproject.com/query?status=new&status=assigned&status=reopened&has_patch=1&order=priority
+.. _ticket tracker: http://code.djangoproject.com/newticket
diff --git a/docs/internals/contributing/writing-code/unit-tests.txt b/docs/internals/contributing/writing-code/unit-tests.txt
new file mode 100644
index 0000000000..fd9024e1a9
--- /dev/null
+++ b/docs/internals/contributing/writing-code/unit-tests.txt
@@ -0,0 +1,167 @@
+==========
+Unit tests
+==========
+
+Django comes with a test suite of its own, in the ``tests`` directory of the
+Django tarball. It's our policy to make sure all tests pass at all times.
+
+The tests cover:
+
+ * Models and the database API (``tests/modeltests/``).
+ * Everything else in core Django code (``tests/regressiontests``)
+ * Contrib apps (``django/contrib/<contribapp>/tests``, see below)
+
+We appreciate any and all contributions to the test suite!
+
+The Django tests all use the testing infrastructure that ships with Django for
+testing applications. See :doc:`Testing Django applications </topics/testing>`
+for an explanation of how to write new tests.
+
+.. _running-unit-tests:
+
+Running the unit tests
+----------------------
+
+Quickstart
+~~~~~~~~~~
+
+Running the tests requires a Django settings module that defines the
+databases to use. To make it easy to get started. Django provides a
+sample settings module that uses the SQLite database. To run the tests
+with this sample ``settings`` module, ``cd`` into the Django
+``tests/`` directory and run:
+
+.. code-block:: bash
+
+ ./runtests.py --settings=test_sqlite
+
+If you get an ``ImportError: No module named django.contrib`` error,
+you need to add your install of Django to your ``PYTHONPATH``. For
+more details on how to do this, read
+:ref:`pointing-python-at-the-new-django-version`.
+
+Using another ``settings`` module
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The included settings module allows you to run the test suite using
+SQLite. If you want to test behavior using a different database (and
+if you're proposing patches for Django, it's a good idea to test
+across databases), you may need to define your own settings file.
+
+To run the tests with different settings, ``cd`` to the ``tests/`` directory
+and type:
+
+.. code-block:: bash
+
+ ./runtests.py --settings=path.to.django.settings
+
+The :setting:`DATABASES` setting in this test settings module needs to define
+two databases:
+
+ * A ``default`` database. This database should use the backend that
+ you want to use for primary testing
+
+ * A database with the alias ``other``. The ``other`` database is
+ used to establish that queries can be directed to different
+ databases. As a result, this database can use any backend you
+ want. It doesn't need to use the same backend as the ``default``
+ database (although it can use the same backend if you want to).
+
+If you're using a backend that isn't SQLite, you will need to provide other
+details for each database:
+
+ * The :setting:`USER` option for each of your databases needs to
+ specify an existing user account for the database.
+
+ * The :setting:`PASSWORD` option needs to provide the password for
+ the :setting:`USER` that has been specified.
+
+ * The :setting:`NAME` option must be the name of an existing database to
+ which the given user has permission to connect. The unit tests will not
+ touch this database; the test runner creates a new database whose name
+ is :setting:`NAME` prefixed with ``test_``, and this test database is
+ deleted when the tests are finished. This means your user account needs
+ permission to execute ``CREATE DATABASE``.
+
+You will also need to ensure that your database uses UTF-8 as the default
+character set. If your database server doesn't use UTF-8 as a default charset,
+you will need to include a value for ``TEST_CHARSET`` in the settings
+dictionary for the applicable database.
+
+Running only some of the tests
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Django's entire test suite takes a while to run, and running every single test
+could be redundant if, say, you just added a test to Django that you want to
+run quickly without running everything else. You can run a subset of the unit
+tests by appending the names of the test modules to ``runtests.py`` on the
+command line.
+
+For example, if you'd like to run tests only for generic relations and
+internationalization, type:
+
+.. code-block:: bash
+
+ ./runtests.py --settings=path.to.settings generic_relations i18n
+
+How do you find out the names of individual tests? Look in
+``tests/modeltests`` and ``tests/regressiontests`` -- each directory name
+there is the name of a test.
+
+If you just want to run a particular class of tests, you can specify a list of
+paths to individual test classes. For example, to run the ``TranslationTests``
+of the ``i18n`` module, type:
+
+.. code-block:: bash
+
+ ./runtests.py --settings=path.to.settings i18n.TranslationTests
+
+Going beyond that, you can specify an individual test method like this:
+
+.. code-block:: bash
+
+ ./runtests.py --settings=path.to.settings i18n.TranslationTests.test_lazy_objects
+
+Running all the tests
+~~~~~~~~~~~~~~~~~~~~~
+
+If you want to run the full suite of tests, you'll need to install a number of
+dependencies:
+
+ * PyYAML_
+ * Markdown_
+ * Textile_
+ * Docutils_
+ * setuptools_
+ * memcached_, plus a :ref:`supported Python binding <memcached>`
+ * gettext_ (:ref:`gettext_on_windows`)
+
+If you want to test the memcached cache backend, you'll also need to define
+a :setting:`CACHES` setting that points at your memcached instance.
+
+Each of these dependencies is optional. If you're missing any of them, the
+associated tests will be skipped.
+
+.. _PyYAML: http://pyyaml.org/wiki/PyYAML
+.. _Markdown: http://pypi.python.org/pypi/Markdown/1.7
+.. _Textile: http://pypi.python.org/pypi/textile
+.. _docutils: http://pypi.python.org/pypi/docutils/0.4
+.. _setuptools: http://pypi.python.org/pypi/setuptools/
+.. _memcached: http://www.danga.com/memcached/
+.. _gettext: http://www.gnu.org/software/gettext/manual/gettext.html
+
+Contrib apps
+------------
+
+Tests for apps in ``django/contrib/`` go in their respective directories under
+``django/contrib/``, in a ``tests.py`` file. (You can split the tests over
+multiple modules by using a ``tests`` directory in the normal Python way.)
+
+For the tests to be found, a ``models.py`` file must exist (it doesn't
+have to have anything in it). If you have URLs that need to be
+mapped, put them in ``tests/urls.py``.
+
+To run tests for just one contrib app (e.g. ``markup``), use the same
+method as above::
+
+ ./runtests.py --settings=settings markup