Thanks for clearing that up. I've made an issue based on your gist https://github.com/sympy/sympy/issues/8121
On Sat, Sep 27, 2014 at 8:46 AM, Ronan Lamy <[email protected]> wrote: > Le 26/09/14 20:14, Peter Brady a écrit : > > I've been trying to get better compatibility with py.test recently and >> have come across a very strange error: >> >> | >> $ py.test sympy/physics/vector/tests -k test_coordinate_vars -v >> ============================= test session starts >> ============================== >> platform linux -- Python 3.4.1 -- py-1.4.20 -- pytest-2.5.2 -- >> /home/ptb/miniconda3/bin/python3 >> architecture: 64-bit >> cache: yes >> ground types: python >> >> collected 39 items >> >> sympy/physics/vector/tests/test_frame.py:10: test_coordinate_vars FAILED >> >> =================================== FAILURES >> =================================== >> _____________________________ test_coordinate_vars >> _____________________________ >> >> def test_coordinate_vars(): >> """Tests the coordinate variables functionality""" >> >>> assert CoordinateSym('Ax', A, 0) == A[0] >>> >> E assert Ax == A_x >> E + where Ax = CoordinateSym('Ax', A, 0) >> >> sympy/physics/vector/tests/test_frame.py:12: AssertionError >> DO *NOT* COMMIT! >> =============== 38 tests deselected by '-ktest_coordinate_vars' >> ================ >> =================== 1 failed, 38 deselected in 0.22 seconds >> ==================== >> | >> >> | >> $ py.test sympy/physics/vector/tests/test_frame.py -k >> test_coordinate_vars -v >> ============================= test session starts >> ============================== >> platform linux -- Python 3.4.1 -- py-1.4.20 -- pytest-2.5.2 -- >> /home/ptb/miniconda3/bin/python3 >> architecture: 64-bit >> cache: yes >> ground types: python >> >> collected 4 items >> >> sympy/physics/vector/tests/test_frame.py:10: test_coordinate_vars PASSED >> >> ================ 3 tests deselected by '-ktest_coordinate_vars' >> ================ >> ==================== 1 passed, 3 deselected in 2.11 seconds >> ==================== >> | >> >> The same test passes or fails depending on if the test file is specified >> exactly or if the test is found via py.test collection... Any py.test >> gurus know why? >> > > The only difference is that in the first case, all the test_ modules are > imported. Calling ReferenceFrame('A') multiple times is the problem, > presumably due to caching shenanigans in CoordinateSym. Here's a test that > shows the issue more clearly: https://gist.github.com/rlamy/ > 2fcb944ed462164ac4f8 > > -- > You received this message because you are subscribed to a topic in the > Google Groups "sympy" group. > To unsubscribe from this topic, visit https://groups.google.com/d/ > topic/sympy/OqW6m8xz6Ic/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/sympy. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/sympy/5426CDD4.30002%40gmail.com. > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CALoNiQfK9oLETYbNeXh8%3DBGJB8h6zr8rKX%3DRfYK%3D4kjPPX_Pig%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
