Code Coverage by Sentry allows developers to see the untested code causing errors directly in their stack trace. This helps to avoid similar errors from happening in the future. It provides code coverage at every stage of development, allowing developers to check and correct code coverage before release in their code host, and find it in the stack trace when issues arise. The tool aggregates coverage reporting, shows changes over time, and provides cross-repo analytics for visibility across all services. It also allows users to group their testing concerns by creating custom statuses and grouping coverage in their repo without modifying their test setup using Flags and Components. Codecov unifies coverage data in one place and visualizes the data, providing an API to query the data for analytics purposes. It provides feedback on pull requests directly, improving the developer experience and shortening the feedback loop.

Features:

• Code Coverage Understand test coverage of code.
• Coverage by Project Track coverage metrics for individual projects.
• Coverage by Change/Patch Monitor coverage with each code change.
• PR Comments Feedback on pull requests with coverage insights.
• Flags Define coverage requirements for projects.