Passing Tests Don't Guarantee Correct Code, Developers Warned

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A green test suite only confirms that an implementation satisfies the tests written for it, not that the underlying logic is truly correct. Developers are cautioned that a small code change could still pass all tests while introducing faulty behaviour. The concern centres on tests that are too closely tailored to a specific implementation, leaving gaps in coverage. This highlights a broader software quality issue where test suites can produce false confidence if they lack robustness against behavioural variations.

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