Unit Tests

Idea

We want to test a unit of code to make sure it does what we expect, i.e.

def test_addition():
    # given
    summands = [3, 2]

    # when
    the_sum = sum(summands)

    # then
    assert the_sum == 5

Main ingredience of a unit test

• test data

• the functionality you want to test

• meaningful assert statements

Code of Conduct

Some things to keep in mind when writing your unit tests.

Does	Do nots
bring your own test data	API calls
temporary files	read test data from files
negative control	mocks
self-sufficiency
focus on your own package