SgtMook/sympy — comment on commit 130b92a95d8f799cc7474f8ae52d103e0c1bb84f
File: sympy/core/tests/test_numbers.py line 344
By asmeurer:

I take it the cases you didn't do here `nan + x` and `nan*x` were already tested somewhere?

Let's add them anyway (unless they are tested in this file), because they may just be tested by some other computation, and it might change in the future if that computation changes.