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Crafting Test-Driven Software with Python

You're reading from   Crafting Test-Driven Software with Python Write test suites that scale with your applications' needs and complexity using Python and PyTest

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Product type Paperback
Published in Feb 2021
Publisher Packt
ISBN-13 9781838642655
Length 338 pages
Edition 1st Edition
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Author (1):
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Alessandro Molina Alessandro Molina
Author Profile Icon Alessandro Molina
Alessandro Molina
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Table of Contents (18) Chapters Close

Preface 1. Section 1: Software Testing and Test-Driven Development
2. Getting Started with Software Testing FREE CHAPTER 3. Test Doubles with a Chat Application 4. Test-Driven Development while Creating a TODO List 5. Scaling the Test Suite 6. Section 2: PyTest for Python Testing
7. Introduction to PyTest 8. Dynamic and Parametric Tests and Fixtures 9. Fitness Function with a Contact Book Application 10. PyTest Essential Plugins 11. Managing Test Environments with Tox 12. Testing Documentation and Property-Based Testing 13. Section 3: Testing for the Web
14. Testing for the Web: WSGI versus HTTP 15. End-to-End Testing with the Robot Framework 16. About Packt 17. Other Books You May Enjoy

Embracing specifications by example

A common problem with acceptance tests is that it takes some effort to understand what's going on. If you are not already familiar with the domain, it can be easy to misunderstand them, thus leading to the wrong checks being performed even if everyone that reviewed it agreed with the original acceptance tests.

For example, if I read an acceptance test such as the following:

Given a first number 2
And a second number 3
When I run the software
Then I get 3 as the output

I might be tempted to understand it as, Oh, ok! The test is meant to verify that given two numbers, we print the highest one.

But that might not be the requirement; the requirement might actually be, Given two numbers, print the lowest one plus one. How can I understand which one that test was actually meant to verify?

The answer is to provide more examples. The more examples we provide for our tests, the easier it is to understand them.

Examples are provided in a table-like format,...

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