arbuckle d. - learning python testing - 2014.pdf

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Learning Python Testing
Table of Contents
Learning Python Testing
Credits
About the Author
About the Reviewers
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Free access for Packt account holders
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Errata
Piracy
Questions
1. Python and Testing
Testing for fun and profit
Levels of testing
Unit testing
Integration testing
System testing
Acceptance testing
Regression testing
Test-driven development
You’ll need Python
Summary
2. Working with doctest
Where doctest performs best
The doctest language
Example – creating and running a simple doctest
Result – three times three does not equal ten
The syntax of doctests
Example – a more complex test
Result – five tests run
Expecting exceptions
Example – checking for an exception
Result – success at failing
Expecting blank lines
Controlling doctest behavior with directives
Ignoring part of the result
Example – ellipsis test drive
Result – ellipsis elides
Ignoring white space
Example – invoking normality
Result – white space matches any other white space
Skipping an example
Example – humans only
Result – it looks like a test, but it’s not
The other directives
The execution scope of doctest tests
Check your understanding
Exercise – English to doctest
Embedding doctests into docstrings
Example – a doctest in a docstring
Result – the code is now self-documenting and self-testable
Putting it into practice – an AVL tree

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