Modern QA2026Constraint Testing — tiles
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Constraint Testing

4.1OverviewDatabase constraints are the database's built-in test suite. They enforce data integrity rules at the lowest level — even if the…43 words4.2Types of Constraints107 words4.3Testing Each Constraint Type19 words4.4Why Test Constraints?"If the database has the constraint, why test it?" Because:59 words4.5Discovering Existing Constraints0 words4.6Practical Exercise1. Write tests for each constraint type on a users table: PK, FK, UNIQUE, NOT NULL, CHECK 2. Test CASCADE vs RESTRICT behavior on a foreign…65 words4.7Key Takeaways- Database constraints are the last line of defense for data integrity - Test every constraint type: PK, FK, UNIQUE, NOT NULL, CHECK…63 words