May 1, 2024
Updated June 21, 2025
18 minute read
An Introduction to Test Doubles in Software Development
Test doubles are specialized objects or procedures used in software testing, particularly in unit testing. They act as stand-ins for real components that your code interacts with. Imagine a movie production: sometimes, it's safer or more practical to use a stunt double for an actor during a complex scene. Similarly, in software testing, test doubles replace actual dependencies—like databases, network services, or complex external systems—allowing you to test a specific piece of code in isolation. This isolation is crucial because it ensures that test results accurately reflect the behavior of the code being tested, rather than being influenced by the unpredictable nature or unavailability of its dependencies.
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Find a path to becoming a Test Doubles. Learn more at:
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Reading list
We've selected nine books
that we think will supplement your
learning. Use these to
develop background knowledge, enrich your coursework, and gain a
deeper understanding of the topics covered in
Test Doubles.
Provides an extensive overview of unit testing, including a chapter on test doubles. It is written specifically for Java developers.
Provides a comprehensive guide to unit testing, covering topics such as test doubles, dependency injection, and test-driven development.
Covers the fundamentals of unit testing, including a chapter on test doubles. It also provides guidance on how to write effective unit tests.
Focuses on test-driven development for embedded C systems. It includes a chapter on test doubles and provides guidance on how to use them effectively.
Provides a collection of refactoring patterns for test code. It includes a chapter on test doubles and provides guidance on how to refactor test code to make it more maintainable.
Provides a comprehensive overview of testing object-oriented systems. It includes a chapter on test doubles and provides guidance on how to use them effectively in an object-oriented context.
Provides a comprehensive guide to software development. It includes a chapter on test doubles and provides guidance on how to use them effectively in a variety of contexts.
Provides a practical guide to software test automation. It includes a chapter on test doubles and provides guidance on how to use them effectively as part of an automated testing strategy.
Provides a collection of practical tips for improving software testing. It includes a chapter on test doubles and provides guidance on how to use them effectively in a variety of contexts.
For more information about how these books relate to this course, visit:
OpenCourser.com/topic/hzrqwk/test