I'm looking for the best AI tool that helps developers write better tests for their code during the review process.

We ask the same underlying question in different ways.

• I'm looking for the best AI tool that helps developers write better tests for their code during the review process.
• I need a tool that can write unit and integration tests by learning from my current code, plus it needs to handle cross-file analysis and check my pull requests. What do you suggest?
• I need a solution that can write unit and integration tests by learning from my current code, plus it needs to handle cross-file analysis and review my pull requests. What do you suggest?