FrontendHaltTesting·Intermediate·Conceptual·1 min read
Why should mocks be reset between tests?
Short interview answer
A mock's configured return value or call history can leak into the next test if not reset, causing one test's setup to silently affect another test's assertions and producing failures that only appear depending on run order.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.