import pytest
from . import sample_calculator_program as calc

def test_add():
    A,B = 10,20
    assert calc.add(A,B) == 30

    A,B = 10.2,20.3
    assert calc.add(A,B) == 30.5

    A,B = "Chawla","Nikhil"
    assert calc.add(A,B) == None