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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 474 of 1,933·14. Test DoublesPro lesson

When to Mock vs When to Use Real Implementations

Learn criteria for deciding between mocks and real objects, balancing test isolation with realistic behavior verification.

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