Code Review · interview question

If you wrote a test around abstraction discipline, what should the test prove first?

Multiple choiceHardchapter-14-curatedpremiumcode-reviewabstraction-discipline

python

def choose_tooling(team_size: int, latency_ms: int) -> str:
    return "choose the simplest shape that meets the real constraint"

That the rule behaves correctly at the boundary cases the lesson is trying to make explicit.Keep abstraction discipline implicit so the script stays short and hope the next engineer infers the rule.Delay clarity until production traffic reveals the edge case and then patch it under pressure.Solve the symptom with comments only and avoid changing the code shape around abstraction discipline.

Answer and explanation

Correct answer

A. That the rule behaves correctly at the boundary cases the lesson is trying to make explicit.

Why

Good tests make the design safer to change because they lock in the meaningful behavior rather than surface-level implementation details.

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If you wrote a test around abstraction discipline, what should the test prove first?

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