Creating and Running Your First Test

In this lesson, you will learn:

• The basics of building a Pytest test.
• About Python Assert.
• How to build a basic test in Pytest.
• How to run a test in Pytest.
• About Pytests test discovery.

You can find the scripts and code for this lesson within the Pytest repo under the directory: 002_getting_started/001_creating_first_test.

Creating Your First Test

Tests within Pytest are based upon using the assert keyword.

What’s Assert?

Python assert is a built-in keyword within Python that allows us to:

test if a condition in our code returns True.

If the condition after the assert does not return True, then an AssertionError exception will be raised (example shown below):

>>> assert 1 == 2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AssertionError

>>> assert 1 == 1
>>>