Practical Testing Habits That Prevent Costly Production Bugs

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A software developer writing for DEV Community shares testing strategies focused on maximizing return with minimal effort, drawing from a personal experience of a payment bug reaching production. The core advice is to prioritize tests for high-impact areas like authentication, pricing logic, and database-writing endpoints rather than chasing full code coverage. The article recommends balancing unit tests for isolated logic with a small number of integration tests for critical flows, while limiting slow and brittle end-to-end tests. Writing readable tests with descriptive names and reusable factory functions is emphasized to keep the test suite maintainable and easy to expand. Automating test runs via pre-commit hooks or CI pipelines, along with writing regression tests whenever a bug is found, are highlighted as habits that make testing a seamless part of the development workflow.

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