Coveralls.io is service to publish your coverage stats online with a lot of nice features. This package provides seamless integration with coverage.py in your python projects. For ruby projects, there is an official gem. Only projects hosted on Github are supported.

Works with python 2.6+, 3.2+ and pypy 1.9.

This library will publish your coverage results on coveralls.io for everyone to see (unless you're using pro account). This package can possibly work with different CI environments, but it's only tested to work with Travis CI atm.

1. First, log in via Github and add your repo on Coveralls website.
2. Add pip install coveralls to install section of .travis.yml

3. Make sure you run your tests with coverage during the build in script part. Example:

   # --source specifies what packages to cover, you probably want to use that option
   script:
     coverage run --source=yourpackagename setup.py test

   Note, that example command will gather coverage for specified package. If you wish to customize what's included in your reports, consult coverage docs.

4. Execute run coveralls in after_success section:

   after_success:
     coveralls

Full example of .travis.yml:

language: python
python:
  - 2.7
  - 3.3
install:
  - pip install -r requirements.txt
  - pip install coveralls
script:
  coverage run --source=moscowdjango,meetup manage.py test
after_success:
  coveralls

If you're NOT using Travis, first option is to provide a repo_token option in .coveralls.yml at the root of your repo. This is your own secret token, which is available at the bottom of your repository's page on Coveralls. Make sure it stays secret, do not put it in your public repo.

Example of .coveralls.yml:

# .coveralls.yml
repo_token: TjkDuVpGjuQcRhNW8dots9c8SSnv7ReM5

Another alternative is to use COVERALLS_REPO_TOKEN env variable.

Nosetests provide a plugin for coverage measurement of your code:

$ nosetests  --with-coverage --cover-package=<your_package_name>

However, it gathers coverage for all executed code, ignoring source config option in .coveragerc. It means, that coveralls will report unnecessary files, which is inconvenient. Here is a workaround, use omit option in your .coveragerc to specify a list of filename patterns, the files to leave out of reporting (your paths might differ) :

[report]
omit =
    */python?.?/*
    */site-packages/nose/*

Note, that native coverage.py and py.test are not affected by this problem and do not require this workaround.

It makes custom report for data generated by coverage.py package and sends it to json API of coveralls.io service. All python files in your coverage analysis are posted to this service along with coverage stats, so please make sure you're not ruining your own security! For private projects there is Coveralls Pro.

This section is a list of most common options for coverage.py, which collects all the data. Coveralls feeds from this data, so it's good to know how to to configure coverage.py.

To limit the report with only your packages, specify their names (or directories):

[run]
source = pkgname,your_otherpackage

To exclude parts of your source from coverage, for example migrations folders:

[report]
omit = */migrations/*

Some lines are never executed in your tests, but that can be ok. To mark those lines use inline comments right in your source code:

if debug:   # pragma: no cover
    msg = "blah blah"
    log_message(msg, a)

Sometimes it can be tedious to mark them in code, so you can specify whole lines to .coveragerc:

[report]
exclude_lines =
    pragma: no cover
    def __repr__
    raise AssertionError
    raise NotImplementedError
    if __name__ == .__main__.:

Finally, if you're using non-default configuration file, specify it to coveralls command:

$ coveralls --rcfile=<file>

In case your coverage is not submitted to coveralls.io, despite your best efforts to configure, you can use debug:

$ coveralls debug

Debug mode doesn't send anything, just outputs prepared json and reported files list to stdout.

Run tests:

$ python setup.py test

Install latest unstable version:

$ pip install coveralls==dev