Book Image

Crafting Test-Driven Software with Python

By : Alessandro Molina
Book Image

Crafting Test-Driven Software with Python

By: Alessandro Molina

Overview of this book

Test-driven development (TDD) is a set of best practices that helps developers to build more scalable software and is used to increase the robustness of software by using automatic tests. This book shows you how to apply TDD practices effectively in Python projects. You’ll begin by learning about built-in unit tests and Mocks before covering rich frameworks like PyTest and web-based libraries such as WebTest and Robot Framework, discovering how Python allows you to embrace all modern testing practices with ease. Moving on, you’ll find out how to design tests and balance them with new feature development and learn how to create a complete test suite with PyTest. The book helps you adopt a hands-on approach to implementing TDD and associated methodologies that will have you up and running and make you more productive in no time. With the help of step-by-step explanations of essential concepts and practical examples, you’ll explore automatic tests and TDD best practices and get to grips with the methodologies and tools available in Python for creating effective and robust applications. By the end of this Python book, you will be able to write reliable test suites in Python to ensure the long-term resilience of your application using the range of libraries offered by Python for testing and development.
Table of Contents (18 chapters)
1
Section 1: Software Testing and Test-Driven Development
6
Section 2: PyTest for Python Testing
13
Section 3: Testing for the Web
16
About Packt

Testing with web browsers

We have seen how, using libraries, we can extend Robot with additional commands that allow us to write most different kinds of tests. One of the most frequent use cases for Robot is actually web development as it has a very convenient SeleniumLibrary library that provides many commands to control a real web browser and perform tests that can involve JavaScript (Selenium library reference: https://robotframework.org/SeleniumLibrary/SeleniumLibrary.html).

Once we have installed the robotframework and robotframework-seleniumlibrary Python distributions, in order to be able to write tests that involve a real browser, we will need to enable the web drivers for the browsers we want to use. So, we will need those browsers to be available and then, through the webdrivermanager utility that we installed previously, we can enable the drivers for all the browsers we have available:

$ webdrivermanager firefox chrome
Downloading WebDriver for browser: "firefox"
2588kb...