Book Image

Python GUI Programming with Tkinter.

By : Alan D. Moore
Book Image

Python GUI Programming with Tkinter.

By: Alan D. Moore

Overview of this book

Tkinter is a lightweight, portable, and easy-to-use graphical toolkit available in the Python Standard Library, widely used to build Python GUIs due to its simplicity and availability. This book teaches you to design and build graphical user interfaces that are functional, appealing, and user-friendly using the powerful combination of Python and Tkinter. After being introduced to Tkinter, you will be guided step-by-step through the application development process. Over the course of the book, your application will evolve from a simple data-entry form to a complex data management and visualization tool while maintaining a clean and robust design. In addition to building the GUI, you'll learn how to connect to external databases and network resources, test your code to avoid errors, and maximize performance using asynchronous programming. You'll make the most of Tkinter's cross-platform availability by learning how to maintain compatibility, mimic platform-native look and feel, and build executables for deployment across popular computing platforms. By the end of this book, you will have the skills and confidence to design and build powerful high-end GUI applications to solve real-world problems.
Table of Contents (23 chapters)
Title Page
Copyright and Credits
Dedication
Packt Upsell
Contributors
Preface
Index

Automated testing basics


Up until now, testing our application has been a process of launching it, running it through a few basic procedures, and verifying that it did what we expected it to do. This approach works acceptably on a very small script, but, as our application grows, it becomes an increasingly time-consuming and error-prone process to verify the application's behavior. Using automated testing, we can consistently verify our application logic within seconds.

There are several forms of automated testing, but the two most common are unit testing and integration testing. Unit tests work with discrete pieces of code in isolation, allowing us to quickly verify the behavior of specific sections. Integration tests verify the interactions of multiple units of code. We'll be writing both kinds of tests to verify the behavior of our application.

A simple unit test

At its most basic, a unit test is just a short program that runs a unit of code under different conditions and compares its output...