Pytest Concepts Examples and More

Pytest is a popular testing framework for Python. It’s designed to be easy to use and to support a wide range of testing needs. Here are some examples to get you started with pytest.

Installing pytest

Before you can use pytest, you need to install it. You can install pytest using pip:

pip install pytest

Writing tests

In pytest, tests are represented by functions. To write a test, you define a function with a name that begins with test_. Here's an example of a simple test function:

def test_example():
    assert 1 + 1 == 2

This test function tests that the expression 1 + 1 is equal to 2. If the test passes, the test function will complete without raising an exception. If the test fails, the test function will raise an AssertionError.

You can write as many test functions as you like in a single file. It’s a good idea to use descriptive names for your test functions to make it easy to understand what each test is for.

Running tests

To run your tests, you can use the pytest command. By default, pytest will search for test files (files with names that begin with test_ or end with _test) in the current directory and its subdirectories…