PyTest

The simplest way of testing is to use pytest.

Writing tests

Pytest automatically runs functions whose names begin with test. Use assert to check that values are what you expect.

## double.py
def double(x): return 2*x
def test_double():
    assert 10 == double(5)
    assert 90 == double(45)

Running tests

There are two ways to run your tests: manually or automatically.

Method 1: Manually Run

Open the console and type pytest main.py. All of your test cases in main.py will run.

Method 2: Automatically Run

1. Create a separate file called test_something.py that contains your testing code. The "test_" part of the filename is required.

2. In the main file, run the pytest main method:

## main.py - automatically run when you hit "run"
import pytest
pytest.main()