[yt-dev] Issue #1139: Cannot run nose tests (yt_analysis/yt)

[Erik Schnetter]

New issue 1139: Cannot run nose tests
https://bitbucket.org/yt_analysis/yt/issues/1139/cannot-run-nose-tests

Erik Schnetter:

I have cloned and installed yt, but running the self-tests fails (see below). I am using Python 2.7 installed via Macports on OS X El Capitan.

Can you give me a pointer to remedy this?

```
$ python setup.py develop --user --prefix=
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/setuptools/dist.py:285: UserWarning: Normalizing '3.1dev' to '3.1.dev0'
  normalized_version,
non-existing path in 'yt/utilities/spatial': 'yt/utilities/spatial/tests'
running develop
running build_scripts
running egg_info
running build_src
build_src
building py_modules sources
building extension "yt.analysis_modules.halo_finding.fof.EnzoFOF" sources
building extension "yt.analysis_modules.halo_finding.hop.EnzoHop" sources
building extension "yt.analysis_modules.ppv_cube.ppv_utils" sources
building extension "yt.frontends.artio._artio_caller" sources
building extension "yt.frontends.sph.smoothing_kernel" sources
building extension "yt.geometry.oct_container" sources
building extension "yt.geometry.oct_visitors" sources
building extension "yt.geometry.particle_oct_container" sources
building extension "yt.geometry.selection_routines" sources
building extension "yt.geometry.particle_deposit" sources
building extension "yt.geometry.particle_smooth" sources
building extension "yt.geometry.fake_octree" sources
building extension "yt.utilities.spatial.ckdtree" sources
building extension "yt.utilities.spatial._distance_wrap" sources
building extension "yt.utilities.lib.CICDeposit" sources
building extension "yt.utilities.lib.ContourFinding" sources
building extension "yt.utilities.lib.DepthFirstOctree" sources
building extension "yt.utilities.lib.fortran_reader" sources
building extension "yt.utilities.lib.geometry_utils" sources
building extension "yt.utilities.lib.Interpolators" sources
building extension "yt.utilities.lib.alt_ray_tracers" sources
building extension "yt.utilities.lib.marching_cubes" sources
building extension "yt.utilities.lib.misc_utilities" sources
building extension "yt.utilities.lib.Octree" sources
building extension "yt.utilities.lib.origami" sources
building extension "yt.utilities.lib.image_utilities" sources
building extension "yt.utilities.lib.PointsInVolume" sources
building extension "yt.utilities.lib.QuadTree" sources
building extension "yt.utilities.lib.RayIntegrators" sources
building extension "yt.utilities.lib.mesh_utilities" sources
building extension "yt.utilities.lib.grid_traversal" sources
building extension "yt.utilities.lib.write_array" sources
building extension "yt.utilities.lib.ragged_arrays" sources
building extension "yt.utilities.lib.GridTree" sources
building extension "yt.utilities.lib.amr_kdtools" sources
building extension "yt.utilities.data_point_utilities" sources
building extension "yt.visualization._MPL" sources
building data_files sources
build_src: building npy-pkg config files
writing yt.egg-info/PKG-INFO
writing top-level names to yt.egg-info/top_level.txt
writing dependency_links to yt.egg-info/dependency_links.txt
writing entry points to yt.egg-info/entry_points.txt
reading manifest template 'MANIFEST.in'
no previously-included directories found matching 'doc/source/reference/api/generated'
no previously-included directories found matching 'doc/build/'
writing manifest file 'yt.egg-info/SOURCES.txt'
running build_ext
customize UnixCCompiler
customize UnixCCompiler using build_ext
Creating /Users/eschnett/Library/Python/2.7/lib/python/site-packages/yt.egg-link (link to .)
yt 3.1.dev0 is already the active version in easy-install.pth
Installing yt script to /Users/eschnett/Library/Python/2.7/bin
Installing iyt script to /Users/eschnett/Library/Python/2.7/bin
Installing pyro_queue.py script to /Users/eschnett/Library/Python/2.7/bin
Installing yt_lodgeit.py script to /Users/eschnett/Library/Python/2.7/bin

Installed /Users/eschnett/src/yt
Processing dependencies for yt==3.1.dev0
Finished processing dependencies for yt==3.1.dev0
```

```
$ python
Python 2.7.10 (default, Oct  1 2015, 12:52:17) 
[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.72)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import yt
>>> yt.run_nose()
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/plugins/manager.py:395: RuntimeWarning: Unable to load plugin answer-testing = yt.utilities.answer_testing.framework:AnswerTesting: No module named answer_testing.framework
  RuntimeWarning)
E
======================================================================
ERROR: Failure: OSError ([Errno 2] No such file or directory: '')
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/loader.py", line 411, in loadTestsFromName
    addr.filename, addr.module)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/importer.py", line 47, in importFromPath
    return self.importFromDir(dir_path, fqname)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/importer.py", line 86, in importFromDir
    if (self.sameModule(old, filename)
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/importer.py", line 131, in sameModule
    if _samefile(mod_path, new_path):
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/posixpath.py", line 155, in samefile
    s1 = os.stat(f1)
OSError: [Errno 2] No such file or directory: ''

----------------------------------------------------------------------
Ran 1 test in 0.001s

FAILED (errors=1)
```