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[1.4.X] Fixed #16817 - Added a guide of code coverage to contributing…

… docs.

Thanks Pedro Lima for the draft patch.

Backport of 06f5da3 from master
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commit 3ac70a5907e054c734ca26e435f1ec1215797b08 1 parent 1be0515
@timgraham timgraham authored
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2  .gitignore
@@ -2,3 +2,5 @@
*.pot
*.py[co]
docs/_build/
+tests/coverage_html/
+tests/.coverage
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2  .hgignore
@@ -4,3 +4,5 @@ syntax:glob
*.pot
*.py[co]
docs/_build/
+tests/coverage_html/
+tests/.coverage
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20 docs/internals/contributing/writing-code/unit-tests.txt
@@ -165,6 +165,26 @@ associated tests will be skipped.
.. _gettext: http://www.gnu.org/software/gettext/manual/gettext.html
.. _selenium: http://pypi.python.org/pypi/selenium
+Code coverage
+~~~~~~~~~~~~~
+
+Contributors are encouraged to run coverage on the test suite to identify areas
+that need additional tests. The coverage tool installation and use is described
+in :ref:`testing code coverage<topics-testing-code-coverage>`.
+
+To run coverage on the Django test suite using the standard test settings::
+
+ coverage run ./runtests.py --settings=test_sqlite
+
+After running coverage, generate the html report by running::
+
+ coverage html
+
+When running coverage for the Django tests, the included ``.coveragerc``
+settings file defines ``coverage_html`` as the output directory for the report
+and also excludes several directories not relevant to the results
+(test code or external code included in Django).
+
.. _contrib-apps:
Contrib apps
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2  docs/topics/testing.txt
@@ -575,6 +575,8 @@ to a faster hashing algorithm::
Don't forget to also include in :setting:`PASSWORD_HASHERS` any hashing
algorithm used in fixtures, if any.
+.. _topics-testing-code-coverage:
+
Integration with coverage.py
----------------------------
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5 tests/.coveragerc
@@ -0,0 +1,5 @@
+[run]
+omit = runtests,test_sqlite,regressiontests*,modeltests*,*/django/contrib/*/tests*,*/django/utils/unittest*,*/django/utils/simplejson*,*/django/utils/importlib.py,*/django/test/_doctest.py,*/django/core/servers/fastcgi.py,*/django/utils/autoreload.py,*/django/utils/dictconfig.py
+
+[html]
+directory = coverage_html
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