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Software Engineering

464What are Test Doubles and Why Use Them
465Dummy Objects: The Simplest Test Double
466Stubs: Providing Canned Responses
467Fakes: Working Implementations for Testing
468Spies: Recording Interactions for Verification
469Mocks: Verifying Expected Interactions
470Distinguishing Between Mock Types
471Test Double Libraries and Frameworks
472When to Use Each Type of Test Double
473The Cost-Benefit Trade-offs of Test Doubles
474When to Mock vs When to Use Real Implementations
475Mocking at the Boundary
476The Test Double Pyramid
477Interaction-Based vs State-Based Testing
478Mock Frameworks and Hand-Rolled Doubles
479Partial Mocking and Spying on Real Objects
480Avoiding Over-Mocking
481Testing Through Interfaces
482State Verification: Testing Outcomes
483Behavior Verification: Testing Interactions
484When to Use State vs Behavior Verification
485Over-Specification with Behavior Verification
486Combining State and Behavior Verification
487Test Maintainability and Verification Style

Software Engineering

464What are Test Doubles and Why Use Them
465Dummy Objects: The Simplest Test Double
466Stubs: Providing Canned Responses
467Fakes: Working Implementations for Testing
468Spies: Recording Interactions for Verification
469Mocks: Verifying Expected Interactions
470Distinguishing Between Mock Types
471Test Double Libraries and Frameworks
472When to Use Each Type of Test Double
473The Cost-Benefit Trade-offs of Test Doubles
474When to Mock vs When to Use Real Implementations
475Mocking at the Boundary
476The Test Double Pyramid
477Interaction-Based vs State-Based Testing
478Mock Frameworks and Hand-Rolled Doubles
479Partial Mocking and Spying on Real Objects
480Avoiding Over-Mocking
481Testing Through Interfaces
482State Verification: Testing Outcomes
483Behavior Verification: Testing Interactions
484When to Use State vs Behavior Verification
485Over-Specification with Behavior Verification
486Combining State and Behavior Verification
487Test Maintainability and Verification Style

← Software Engineering

Lesson 464 of 1,933·14. Test DoublesPro lesson

What are Test Doubles and Why Use Them

Understanding test doubles as stand-ins for dependencies to enable isolated, fast, and deterministic unit tests.

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