Added tests to classify_diop
Added tests to classify_diop

jaimahajan1997/sympy,drufat/sympy,postvakje/sympy,yashsharan/sympy,sampadsaha5/sympy,drufat/sympy,skidzo/sympy,aktech/sympy,sampadsaha5/sympy,jaimahajan1997/sympy,souravsingh/sympy,aktech/sympy,kaushik94/sympy,chaffra/sympy,sampadsaha5/sympy,chaffra/sympy,souravsingh/sympy,madan96/sympy,madan96/sympy,yashsharan/sympy,souravsingh/sympy,jaimahajan1997/sympy,skidzo/sympy,skidzo/sympy,kaushik94/sympy,chaffra/sympy,yashsharan/sympy,drufat/sympy,postvakje/sympy,postvakje/sympy,madan96/sympy,kaushik94/sympy,aktech/sympy