test-coverage-review

To find behavioral test coverage gaps, you map changed file diffs to existing project tests to identify unverified critical code paths, focusing on missing error handling, edge cases, and integration boundaries.

Behavioral test coverage evaluates whether tests verify user-facing outcomes and business rules, whereas line coverage only measures which statements execute, often hiding untested error paths and boundary conditions.

You check integration test coverage by analyzing test files against code diffs to uncover untested cross-module interactions, ensuring tests protect critical integration boundaries rather than just implementation details.

Behavioral test coverage review applies across language ecosystems for feature branches and new modules, requiring access to project test files and configurations alongside a diff of changed files to map code paths.

You improve test design by discovering untested error handling paths and boundary conditions, then applying actionable recommendations for concrete test additions or refactors to strengthen regression safety.

High line coverage misses critical edge cases because it only tracks executed statements, failing to verify behavioral gaps where tests do not validate actual runtime behavior, error handling, or boundary conditions.