FrontendHaltTesting·Intermediate·Conceptual·1 min read
What should frontend component tests assert?
Short interview answer
Assert behavior users can observe—roles, names, text, state, navigation, and side effects—rather than private component instances or implementation calls. This makes tests resilient to refactoring while still catching broken contracts.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.