Missing test coverage

Missing test coverage refers to sections or components of code that lack adequate unit or integration tests. Insufficient test coverage means certain code paths or logic aren't verified during automated testing, allowing bugs or unexpected behavior to persist unnoticed. Low coverage leads to reduced confidence in code reliability, complicates refactoring efforts, and increases the likelihood of introducing regressions during updates. Monitoring test coverage, typically measured through tools like Jest, helps ensure thorough testing and dependable application behavior.

To fix missing test coverage, write comprehensive unit tests for previously untested code paths or functionalities, focusing on edge cases and critical logic. Employ automated testing frameworks such as Jest to systematically measure and track coverage, setting clear thresholds to maintain or improve coverage over time. Integrate coverage checks into continuous integration (CI) workflows to enforce coverage standards and identify gaps early. Regularly review and analyze coverage reports to proactively target and resolve untested or under-tested areas, ensuring consistent quality and reliability across your codebase.