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.

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Table of Contents (18 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
1
Section 1: Software Testing and Test-Driven Development
Section 1: Software Testing and Test-Driven Development
Free Chapter
2
Getting Started with Software Testing
Getting Started with Software Testing
Technical requirements
Introducing software testing and quality control
Introducing automatic tests and test suites
Introducing test-driven development and unit tests
Understanding integration and functional tests
Understanding the testing pyramid and trophy
Summary
3
Test Doubles with a Chat Application
Test Doubles with a Chat Application
Technical requirements
Introducing test doubles
Starting our chat application with TDD
Using dummy objects
Replacing components with stubs
Checking behaviors with spies
Using mocks
Replacing dependencies with fakes
Understanding acceptance tests and doubles
Managing dependencies with dependency injection
Summary
4
Test-Driven Development while Creating a TODO List
Test-Driven Development while Creating a TODO List
Technical requirements
Starting projects with TDD
Building applications the TDD way
Preventing regressions
Summary
5
Scaling the Test Suite
Scaling the Test Suite
Technical requirements
Scaling tests
Working with multiple suites
Carrying out performance testing
Enabling continuous integration
Summary
6
Section 2: PyTest for Python Testing
Section 2: PyTest for Python Testing
7
Introduction to PyTest
Introduction to PyTest
Technical requirements
Running tests with PyTest
Writing PyTest fixtures
Managing temporary data with tmp_path
Testing I/O with capsys
Running subsets of the testsuite
Summary
8
Dynamic and Parametric Tests and Fixtures
Dynamic and Parametric Tests and Fixtures
Technical requirements
Configuring the test suite
Generating fixtures
Generating tests with parametric tests
Summary
9
Fitness Function with a Contact Book Application
Fitness Function with a Contact Book Application
Technical requirements
Writing acceptance tests
Using behavior-driven development
Embracing specifications by example
Summary
10
PyTest Essential Plugins
PyTest Essential Plugins
Technical requirements
Using pytest-cov for coverage reporting
Using pytest-benchmark for benchmarking
Using flaky to rerun unstable tests
Using pytest-testmon to rerun tests on code changes
Running tests in parallel with pytest-xdist
Summary
11
Managing Test Environments with Tox
Managing Test Environments with Tox
Technical requirements
Introducing Tox
Testing multiple Python versions with Tox
Using Tox with Travis
Summary
12
Testing Documentation and Property-Based Testing
Testing Documentation and Property-Based Testing
Technical requirements
Testing documentation
Property-based testing
Summary
13
Section 3: Testing for the Web
Section 3: Testing for the Web
14
Testing for the Web: WSGI versus HTTP
Testing for the Web: WSGI versus HTTP
Technical requirements
Testing HTTP
Testing WSGI with WebTest
Using WebTest with web frameworks
Writing Django tests with Django's test client
Summary
15
End-to-End Testing with the Robot Framework
End-to-End Testing with the Robot Framework
Technical requirements
Introducing the Robot Framework
Testing with web browsers
Extending the Robot Framework
Summary
16
About Packt
About Packt
Why subscribe?
17
Other Books You May Enjoy
Other Books You May Enjoy
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