When is it worth writing a test versus just checking manually? #33
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martex-dev
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When is it worth writing a test versus just checking manually? Notes and answer below. |
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martex-dev
Aug 27, 2026
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Test the parts that are not allowed to be wrong and that a human cannot eyeball: money arithmetic, date boundaries, and any figure with legal or financial consequence. Manual checking is fine for layout and copy, where a human notices breakage instantly. The dividing line is whether a silent wrong answer would look plausible, because that is exactly the failure a test catches and a human does not. |
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Test the parts that are not allowed to be wrong and that a human cannot eyeball: money arithmetic, date boundaries, and any figure with legal or financial consequence. Manual checking is fine for layout and copy, where a human notices breakage instantly. The dividing line is whether a silent wrong answer would look plausible, because that is exactly the failure a test catches and a human does not.