marbles

marbles is a Python unittest extension by Jane Adams and Leif Walsh that allows test authors to write richer tests that expose more information to test consumers on test failure. These information-rich tests help test consumers respond to failures without having to dig into the test code.

Installing

The marbles namespace package contains two packages: marbles.core and marbles.mixins. marbles.core provides test cases that expose more information on test failure. marbles.mixins provides a set of semantically-rich assertions for use in both marbles and Python unittest tests. You can install the marbles package as a whole or install each subpackage individually.

You can install marbles directly with setup.py or using pip:

python setup.py install
# -or-
pip install .

You can also install marbles directly from GitLab:

pip install git+https://gitlab.twosigma.com/jane/marbles@<version tag>

You can also install marbles with conda:

conda install marbles

To install the subpackages individually, you can use setup.py:

cd marbles/core && python setup.py install
# -and/or-
cd marbles/mixins && python setup.py install

You can also install the subpackages with conda:

conda install marbles-core
# -and/or-
conda install marbles-mixins

Note that you cannot use pip to install subpackages individually or install subpackages individually from GitLab.

Developing

Create an empty conda environment and install from the requirements.txt file. This will install dependencies and do a development ("editable") install of both of the subpackages.

conda create --yes --name marbles-dev python
source activate marbles-dev
pip install -r requirements.txt

Now you can edit code and run scripts or a Python shell. Imports of marbles modules and packages will come from the current directory, so your changes will take effect.

Running Tests

Tests are written with the builtin unittest package, live in tests/, and are run with setup.py:

python setup.py test

Test Coverage

You can get test coverage by running tests under coverage:

coverage run setup.py test
coverage report

Instead of coverage report's text output you can get an HTML report including branch coverage information:

coverage run setup.py test
coverage html
cd build/coverage/html; python -m http.server 8080

and then visit http://localhost:8080.

Building Documentation

Docs live in docs/ and can be run with setup.py:

python setup.py build_sphinx
cd build/sphinx/html; python -m http.server 8080

and then visit http://localhost:8080.

Releases

Version information is pulled from git tags by versioneer, so cutting a new release is as simple as tagging and pushing the tag:

git tag 0.6.9
git push origin 0.6.9

Once this tag exists, future package and documentation builds will automatically get that version, and users can pip install using that git tag from GitLab:

pip install git+https://gitlab.twosigma.com/jane/[email protected]

After tagging, you can release a new conda package with Jenkins.

Other projects can depend on marbles using dependency_links:

setup(
    ...,
    install_requires=['marbles==0.6.9'],
    dependency_links=['https://gitlab.twosigma.com/jane/[email protected]#egg=marbles-0.6.9'],
    ...
)

Bugs

Please open an issue to report any bugs.