Swift Testing Pro

From Paul Hudson, this does exactly what you'd expect: writes Swift Testing code and reviews existing tests against modern best practices. It catches the usual migration issues like using structs instead of XCTest classes, switching XCTAssertEqual to #expect, and using #require for safe unwrapping. What's genuinely helpful is that it knows the newer Swift Testing features like confirmations, exit tests, and attachments that most other resources miss. The review format is clean with before/after code snippets and prioritized summaries, making it easy to fix the important stuff first.