[Python-modules-team] Bug#934116: nose2: Requires mock 2.0 (for python < 3.6) but 3.0 is in unstable

[Bas Couwenberg]

Source: nose2
Version: 0.9.1-1
Severity: serious
Justification: makes the package in question unusable or mostly so
Control: affects -1 src:python-pyproj

Dear Maintainer,

The rebuild on the buildd of python-pyproj failed [0] due to a version
mismatch between nose2 & python-mock:

 pkg_resources.DistributionNotFound: The 'mock==2.0.0' distribution was not found and is required by nose2

The setup.py for nose2 contains:

    install_requires=[
        "six>=1.7",
        "coverage>=4.4.1",
        # mock on py2, py3.4 and py3.5
        # not just py2: py3 versions of mock don't all have the same
        # interface and this can cause issues
        'mock==2.0.0;python_version<"3.6"',
    ],

But the dependencies of python-nose2 don't reflect this version constraint:

 Depends: python-mock, [...]

Until 2019-07-16 python-mock was at version 2.0.0, but has since
upgraded to 3.0.5.

Please make nose2 work for Python < 3.6 again.

[0] https://buildd.debian.org/status/fetch.php?pkg=python-pyproj&arch=amd64&ver=1.9.6-1%2Bb1&stamp=1565162830&raw=0

Kind Regards,

Bas