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Isolation Levels in SQL: The Setting Most Developers Never Touch

Published
Author
Arif Ikhsanudin
Backend Developer

The default isolation level is not always correct for your use case — understanding what read committed, repeatable read, and serializable actually guarantee determines whether your application has subtle data consistency bugs you haven't found yet.

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Mocking Everything in Your Tests Is a Sign Something Is Wrong

Published
Author
Arif Ikhsanudin
Backend Developer

Tests that mock every dependency are not unit tests — they are tests of mock configuration. When a test setup contains more mock declarations than real assertions, the test has stopped verifying behavior and started verifying wiring.

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