Code Coverage Analysis
Code coverage analysis is a software testing metric that measures the percentage of a program's source code that is executed during a test suite. In smart contract development, high code coverage is a prerequisite for a secure deployment, as it ensures that the majority of the logic has been exercised.
However, high coverage does not guarantee the absence of bugs; it only confirms that the code was reached. Security engineers use coverage reports to identify untested branches or functions, allowing them to create more targeted tests.
By focusing on paths that are difficult to reach, auditors can uncover hidden vulnerabilities that might only appear under specific conditions. It is a foundational practice in the development lifecycle, ensuring that the protocol's complexity is fully understood and verified before the code is finalized.