govindaraj s. - test-driven python development - 2015(1).pdf

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Test-Driven Python Development
Table of Contents
Test-Driven Python Development
Credits
About the Author
Acknowledgments
About the Reviewers
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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. Getting Started with Test-Driven Development
Prerequisites
Understanding test-driven development
TDD versus unit testing versus integration testing
Using TDD to build a stock alert application
Writing our first test
Analyzing the test output
Test errors versus test failures
Making the test pass
Reorganizing the test code
Running the tests after the reorganization
Summary
2. Red-Green-Refactor – The TDD Cycle
Tests are executable requirements
Arrange-Act-Assert
Documenting our tests
Testing for exceptions
Exploring assert methods
Specific asserts versus generic asserts
Setup and teardown
Brittle tests
Refactoring the design
Refactoring tests
Exploring the Rule classes
Exercise
Summary
3. Code Smells and Refactoring
A dual crossover moving average
Implementing the dual crossover moving average
Identifying code smells
Refactoring
The Rename Variable and Rename Method refactorings
Commenting Styles
Replace Magic Literals with Constants
The Extract Method refactoring
Replace Calculation with Temporary Variable
Extract Conditional to Method
The DRY principle
Single Responsibility Principle
Extract Class

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