Book Image

pytest Quick Start Guide

By : Bruno Oliveira
Book Image

pytest Quick Start Guide

By: Bruno Oliveira

Overview of this book

Python's standard unittest module is based on the xUnit family of frameworks, which has its origins in Smalltalk and Java, and tends to be verbose to use and not easily extensible.The pytest framework on the other hand is very simple to get started, but powerful enough to cover complex testing integration scenarios, being considered by many the true Pythonic approach to testing in Python. In this book, you will learn how to get started right away and get the most out of pytest in your daily work?ow, exploring powerful mechanisms and plugins to facilitate many common testing tasks. You will also see how to use pytest in existing unittest-based test suites and will learn some tricks to make the jump to a pytest-style test suite quickly and easily.
Table of Contents (9 chapters)

Tips/discussion

The following are some short topics and tips that did not fit into the previous sections, but that I think are worth mentioning.

When to use fixtures, as opposed to simple functions

Sometimes, all you need is to construct a simple object for your tests, and arguably this can be done in a plain function, not necessarily needing to be implemented as a fixture. Suppose we have a WindowManager class, that does not receive any parameters:

class WindowManager:
...

One way to use it in our tests would be to write a fixture:

@pytest.fixture
def manager():
return WindowManager()

def test_windows_creation(manager):
window = manager.new_help_window("pipes_help.rst")
assert window.title() == &quot...