Replace deprecated assert_ with assertTrue in unittests
Replace deprecated assert_ with assertTrue in unittests

ooguntola/numexpr,tectronics/numexpr,Alwnikrotikz/numexpr,Alwnikrotikz/numexpr,tectronics/numexpr,tectronics/numexpr,ooguntola/numexpr,ooguntola/numexpr,Alwnikrotikz/numexpr