Test Doubles - Terminology, Definitions and Illustrations - with Examples - Part 1

Published: 14 Sep 2025

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This deck is about a subset of the test automation patterns in Gerard Meszaros’ great book, xUnit Test Patterns – Refactoring Test Code.
The subset in question consists of the patterns relating to the concept of Test Doubles.
The deck is inspired by the patterns, and heavily reliant on extracts from the book.
The motivation for the deck is my belief that it is quite beneficial, when using and discussing Test Doubles, to rely on standardised terminology and patterns.