Jan 30, 2023 · Fundamentals

Mastering Effective Unit Tests: Principles, Practices, and Common Pitfalls

This article explains why unit tests should focus on verifying behavior rather than merely increasing coverage, outlines essential testing principles such as AIR, FIRST, and ASCII, provides concrete Java examples for writing, validating, and asserting tests, and offers detailed guidance on handling exceptions and method‑call verification to avoid ineffective testing.

Mockitocode coveragemethod verification

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Mastering Effective Unit Tests: Principles, Practices, and Common Pitfalls