[Debian-med-packaging] Bug#813782: python-matplotlib-venn: FTBFS: [failed test] Intersection with the arc along the same circle (which means infinitely many points usually) is reported as no intersection at all.

[Andreas Tille]

Hi,

as you can read below,  one test of the test suite fails.  As far as I
can see it is possibly a rounding issue rather than a failure.  I wonder
how the test could be tweaked to pass successfully if you share my
opinion or what else could be done to pass the test suite successfully.

Kind regards

     Andreas.

On Fri, Feb 05, 2016 at 09:37:32AM +0100, Chris Lamb wrote:
> Source: python-matplotlib-venn
> Version: 0.11-2
> Severity: serious
> 
> Dear Maintainer,
> 
> python-matplotlib-venn fails to build from source in unstable/amd64:
> 
>   [..]
> 
>   running test
>   running egg_info
>   creating matplotlib_venn.egg-info
>   writing requirements to matplotlib_venn.egg-info/requires.txt
>   writing matplotlib_venn.egg-info/PKG-INFO
>   writing top-level names to matplotlib_venn.egg-info/top_level.txt
>   writing dependency_links to matplotlib_venn.egg-info/dependency_links.txt
>   writing manifest file 'matplotlib_venn.egg-info/SOURCES.txt'
>   warning: manifest_maker: standard file 'setup.py' not found
>   
>   reading manifest file 'matplotlib_venn.egg-info/SOURCES.txt'
>   writing manifest file 'matplotlib_venn.egg-info/SOURCES.txt'
>   running build_ext
>   ============================= test session starts ==============================
>   platform linux2 -- Python 2.7.11, pytest-2.8.5, py-1.4.31, pluggy-0.3.1 -- /usr/bin/python2.7
>   cachedir: ../../../.cache
>   rootdir: /home/lamby/temp/cdt.20160205085405.L1EHTA93Fx/python-matplotlib-venn-0.11, inifile: setup.cfg
>   collecting ... collected 49 items
>   
>   matplotlib_venn/_arc.py::matplotlib_venn._arc.Arc.__init__ PASSED
>   matplotlib_venn/_arc.py::matplotlib_venn._arc.Arc.angle_as_point PASSED
>   ...
>   matplotlib_venn/_venn3.py::matplotlib_venn._venn3.venn3 PASSED
>   matplotlib_venn/_venn3.py::matplotlib_venn._venn3.venn3_circles PASSED
>   
>   =================================== FAILURES ===================================
>   _______________ [doctest] matplotlib_venn._arc.Arc.intersect_arc _______________
>   339         Intersection with the arc along the same circle (which means infinitely many points usually) is reported as no intersection at all.
>   340         
>   341         >>> a = Arc((0, 0), 1, -90, 90, True)
>   342         >>> a.intersect_arc(Arc((1, 0), 1, 90, 270, True))
>   343         [array([ 0.5      , -0.866...]), array([ 0.5      ,  0.866...])]
>   344         >>> a.intersect_arc(Arc((1, 0), 1, 90, 180, True))
>   345         [array([ 0.5      ,  0.866...])]
>   346         >>> a.intersect_arc(Arc((1, 0), 1, 121, 239, True))
>   347         []
>   348         >>> a.intersect_arc(Arc((1, 0), 1, 120, 240, True))
>   Expected:
>       [array([ 0.5      , -0.866...]), array([ 0.5      ,  0.866...])]
>   Got:
>       [array([ 0.5      ,  0.8660254])]
>   
>   /home/lamby/temp/cdt.20160205085405.L1EHTA93Fx/python-matplotlib-venn-0.11/.pybuild/pythonX.Y_2.7/build/matplotlib_venn/_arc.py:348: DocTestFailure
>   ===================== 1 failed, 48 passed in 0.51 seconds ======================
>   E: pybuild pybuild:274: test: plugin custom failed with: exit code=1: cp -a README.rst /home/lamby/temp/cdt.20160205085405.L1EHTA93Fx/python-matplotlib-venn-0.11/.pybuild/pythonX.Y_2.7/build && cd /home/lamby/temp/cdt.20160205085405.L1EHTA93Fx/python-matplotlib-venn-0.11/.pybuild/pythonX.Y_2.7/build && python2.7 /home/lamby/temp/cdt.20160205085405.L1EHTA93Fx/python-matplotlib-venn-0.11/setup.py test && rm README.rst
>   dh_auto_test: pybuild --test --test-pytest -i python{version} -p 2.7 --test --system=custom --test-args=cp -a README.rst {home_dir}/build && cd {home_dir}/build && {interpreter} /home/lamby/temp/cdt.20160205085405.L1EHTA93Fx/python-matplotlib-venn-0.11/setup.py test && rm README.rst --dir . returned exit code 13


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