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Modern Python Cookbook

You're reading from   Modern Python Cookbook 133 recipes to develop flawless and expressive programs in Python 3.8

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Product type Paperback
Published in Jul 2020
Publisher Packt
ISBN-13 9781800207455
Length 822 pages
Edition 2nd Edition
Languages
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Author (1):
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Steven F. Lott Steven F. Lott
Author Profile Icon Steven F. Lott
Steven F. Lott
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Toc

Table of Contents (18) Chapters Close

Preface 1. Numbers, Strings, and Tuples 2. Statements and Syntax FREE CHAPTER 3. Function Definitions 4. Built-In Data Structures Part 1: Lists and Sets 5. Built-In Data Structures Part 2: Dictionaries 6. User Inputs and Outputs 7. Basics of Classes and Objects 8. More Advanced Class Design 9. Functional Programming Features 10. Input/Output, Physical Format, and Logical Layout 11. Testing 12. Web Services 13. Application Integration: Configuration 14. Application Integration: Combination 15. Statistical Programming and Linear Regression 16. Other Books You May Enjoy
17. Index

Unit testing with the unittest module

The unittest module allows us to step beyond the examples used by doctest. Each test case can have one more scenario built as a subclass of the unittest.TestCase class. These use result checks that are more sophisticated than the literal text matching used by the doctest tool.

The unittest module also allows us to package tests outside docstrings. This can be helpful for tests for edge cases that might be too detailed to be helpful documentation. Often, doctest cases focus on the happy path—the most common use cases, where everything works as expected. We can use the unittest module to define test cases that are both on as well as off the happy path.

This recipe will show how we can use the unittest module to create more sophisticated tests. It will step beyond simple text comparison to use the more sophisticated assertion methods of the unittest.TestCase class.

Getting ready

It's sometimes helpful to summarize...

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