7.8 testing your code

This lesson describes unit testing in python.

If you are writing a code which you think will not be used by you or anyone else in the future, then you can skip this lesson. However, if you intend to write a code, which will used by you and others in future then you must write tests for your code, so that your code is reliable. The purpose of writing tests is to make sure that the code works and will keep on working the way it should work.

Consider the following function which adds two numbers

def add(a,b):
    return a+b

Now if we want to write a test for this function, it will look something like below

summation = add(2,2)
assert summation==4

Above we are testing the add function. But we have tested it only with integers as input. We should probably check it with float or other types as well.

assert add(2.0, 2.0)==4.0