Testing · interview question

What is the healthiest performance judgment around arrange act assert?

Multiple choiceMediumchapter-9-curatedpremiumtestingarrange-act-assert

python

def test_discount_rate() -> None:
    # arrange
    subtotal = 120.0
    # act
    result = discount_rate(True, subtotal)
    # assert
    assert result == 0.15

Delay clarity until production traffic reveals the edge case and then patch it under pressure.Keep arrange act assert implicit so the script stays short and hope the next engineer infers the rule.Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.Solve the symptom with comments only and avoid changing the code shape around arrange act assert.

Answer and explanation

Correct answer

C. Measure before optimizing, then change the part that actually dominates cost instead of guessing from style alone.

Why

Premature optimization is usually weaker than targeted optimization backed by measurement.

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What is the healthiest performance judgment around arrange act assert?

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