All the mitmproxy projects strive to maintain 100% code coverage. In general, patches and pull requests will be declined unless they're accompanied by a suitable extension to the test suite. Our tests are written for the [nose](https://nose.readthedocs.org/en/latest/). At the point where you send your pull request, a command like this:

    > nosetests --with-cov --cov-report term-missing ./test

Should give output something like this:

    > ---------- coverage: platform darwin, python 2.7.2-final-0 --
    > Name                   Stmts   Miss  Cover   Missing
    > ----------------------------------------------------
    > libmproxy/__init__         0      0   100%
    > libmproxy/app              4      0   100%
    > libmproxy/cmdline        100      0   100%
    > libmproxy/controller      69      0   100%
    > libmproxy/dump           150      0   100%
    > libmproxy/encoding        39      0   100%
    > libmproxy/filt           201      0   100%
    > libmproxy/flow           891      0   100%
    > libmproxy/proxy          427      0   100%
    > libmproxy/script          27      0   100%
    > libmproxy/utils          133      0   100%
    > libmproxy/version          4      0   100%
    > ----------------------------------------------------
    > TOTAL                   2045      0   100%
    > ----------------------------------------------------
    > Ran 251 tests in 11.864s

There are exceptions to the coverage requirement - for instance, much of the console interface code can't sensibly be unit tested. These portions are excluded from coverage analysis either in the **.coveragerc** file, or using **#pragma no-cover** directives. To keep our coverage analysis relevant, we use these measures as sparingly as possible.